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2016-05-20lib/GCD.c: use binary GCD algorithm instead of EuclideanZhaoxiu Zeng1-0/+1
The binary GCD algorithm is based on the following facts: 1. If a and b are all evens, then gcd(a,b) = 2 * gcd(a/2, b/2) 2. If a is even and b is odd, then gcd(a,b) = gcd(a/2, b) 3. If a and b are all odds, then gcd(a,b) = gcd((a-b)/2, b) = gcd((a+b)/2, b) Even on x86 machines with reasonable division hardware, the binary algorithm runs about 25% faster (80% the execution time) than the division-based Euclidian algorithm. On platforms like Alpha and ARMv6 where division is a function call to emulation code, it's even more significant. There are two variants of the code here, depending on whether a fast __ffs (find least significant set bit) instruction is available. This allows the unpredictable branches in the bit-at-a-time shifting loop to be eliminated. If fast __ffs is not available, the "even/odd" GCD variant is used. I use the following code to benchmark: #include <stdio.h> #include <stdlib.h> #include <stdint.h> #include <string.h> #include <time.h> #include <unistd.h> #define swap(a, b) \ do { \ a ^= b; \ b ^= a; \ a ^= b; \ } while (0) unsigned long gcd0(unsigned long a, unsigned long b) { unsigned long r; if (a < b) { swap(a, b); } if (b == 0) return a; while ((r = a % b) != 0) { a = b; b = r; } return b; } unsigned long gcd1(unsigned long a, unsigned long b) { unsigned long r = a | b; if (!a || !b) return r; b >>= __builtin_ctzl(b); for (;;) { a >>= __builtin_ctzl(a); if (a == b) return a << __builtin_ctzl(r); if (a < b) swap(a, b); a -= b; } } unsigned long gcd2(unsigned long a, unsigned long b) { unsigned long r = a | b; if (!a || !b) return r; r &= -r; while (!(b & r)) b >>= 1; for (;;) { while (!(a & r)) a >>= 1; if (a == b) return a; if (a < b) swap(a, b); a -= b; a >>= 1; if (a & r) a += b; a >>= 1; } } unsigned long gcd3(unsigned long a, unsigned long b) { unsigned long r = a | b; if (!a || !b) return r; b >>= __builtin_ctzl(b); if (b == 1) return r & -r; for (;;) { a >>= __builtin_ctzl(a); if (a == 1) return r & -r; if (a == b) return a << __builtin_ctzl(r); if (a < b) swap(a, b); a -= b; } } unsigned long gcd4(unsigned long a, unsigned long b) { unsigned long r = a | b; if (!a || !b) return r; r &= -r; while (!(b & r)) b >>= 1; if (b == r) return r; for (;;) { while (!(a & r)) a >>= 1; if (a == r) return r; if (a == b) return a; if (a < b) swap(a, b); a -= b; a >>= 1; if (a & r) a += b; a >>= 1; } } static unsigned long (*gcd_func[])(unsigned long a, unsigned long b) = { gcd0, gcd1, gcd2, gcd3, gcd4, }; #define TEST_ENTRIES (sizeof(gcd_func) / sizeof(gcd_func[0])) #if defined(__x86_64__) #define rdtscll(val) do { \ unsigned long __a,__d; \ __asm__ __volatile__("rdtsc" : "=a" (__a), "=d" (__d)); \ (val) = ((unsigned long long)__a) | (((unsigned long long)__d)<<32); \ } while(0) static unsigned long long benchmark_gcd_func(unsigned long (*gcd)(unsigned long, unsigned long), unsigned long a, unsigned long b, unsigned long *res) { unsigned long long start, end; unsigned long long ret; unsigned long gcd_res; rdtscll(start); gcd_res = gcd(a, b); rdtscll(end); if (end >= start) ret = end - start; else ret = ~0ULL - start + 1 + end; *res = gcd_res; return ret; } #else static inline struct timespec read_time(void) { struct timespec time; clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &time); return time; } static inline unsigned long long diff_time(struct timespec start, struct timespec end) { struct timespec temp; if ((end.tv_nsec - start.tv_nsec) < 0) { temp.tv_sec = end.tv_sec - start.tv_sec - 1; temp.tv_nsec = 1000000000ULL + end.tv_nsec - start.tv_nsec; } else { temp.tv_sec = end.tv_sec - start.tv_sec; temp.tv_nsec = end.tv_nsec - start.tv_nsec; } return temp.tv_sec * 1000000000ULL + temp.tv_nsec; } static unsigned long long benchmark_gcd_func(unsigned long (*gcd)(unsigned long, unsigned long), unsigned long a, unsigned long b, unsigned long *res) { struct timespec start, end; unsigned long gcd_res; start = read_time(); gcd_res = gcd(a, b); end = read_time(); *res = gcd_res; return diff_time(start, end); } #endif static inline unsigned long get_rand() { if (sizeof(long) == 8) return (unsigned long)rand() << 32 | rand(); else return rand(); } int main(int argc, char **argv) { unsigned int seed = time(0); int loops = 100; int repeats = 1000; unsigned long (*res)[TEST_ENTRIES]; unsigned long long elapsed[TEST_ENTRIES]; int i, j, k; for (;;) { int opt = getopt(argc, argv, "n:r:s:"); /* End condition always first */ if (opt == -1) break; switch (opt) { case 'n': loops = atoi(optarg); break; case 'r': repeats = atoi(optarg); break; case 's': seed = strtoul(optarg, NULL, 10); break; default: /* You won't actually get here. */ break; } } res = malloc(sizeof(unsigned long) * TEST_ENTRIES * loops); memset(elapsed, 0, sizeof(elapsed)); srand(seed); for (j = 0; j < loops; j++) { unsigned long a = get_rand(); /* Do we have args? */ unsigned long b = argc > optind ? strtoul(argv[optind], NULL, 10) : get_rand(); unsigned long long min_elapsed[TEST_ENTRIES]; for (k = 0; k < repeats; k++) { for (i = 0; i < TEST_ENTRIES; i++) { unsigned long long tmp = benchmark_gcd_func(gcd_func[i], a, b, &res[j][i]); if (k == 0 || min_elapsed[i] > tmp) min_elapsed[i] = tmp; } } for (i = 0; i < TEST_ENTRIES; i++) elapsed[i] += min_elapsed[i]; } for (i = 0; i < TEST_ENTRIES; i++) printf("gcd%d: elapsed %llu\n", i, elapsed[i]); k = 0; srand(seed); for (j = 0; j < loops; j++) { unsigned long a = get_rand(); unsigned long b = argc > optind ? strtoul(argv[optind], NULL, 10) : get_rand(); for (i = 1; i < TEST_ENTRIES; i++) { if (res[j][i] != res[j][0]) break; } if (i < TEST_ENTRIES) { if (k == 0) { k = 1; fprintf(stderr, "Error:\n"); } fprintf(stderr, "gcd(%lu, %lu): ", a, b); for (i = 0; i < TEST_ENTRIES; i++) fprintf(stderr, "%ld%s", res[j][i], i < TEST_ENTRIES - 1 ? ", " : "\n"); } } if (k == 0) fprintf(stderr, "PASS\n"); free(res); return 0; } Compiled with "-O2", on "VirtualBox 4.4.0-22-generic #38-Ubuntu x86_64" got: zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10 gcd0: elapsed 10174 gcd1: elapsed 2120 gcd2: elapsed 2902 gcd3: elapsed 2039 gcd4: elapsed 2812 PASS zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10 gcd0: elapsed 9309 gcd1: elapsed 2280 gcd2: elapsed 2822 gcd3: elapsed 2217 gcd4: elapsed 2710 PASS zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10 gcd0: elapsed 9589 gcd1: elapsed 2098 gcd2: elapsed 2815 gcd3: elapsed 2030 gcd4: elapsed 2718 PASS zhaoxiuzeng@zhaoxiuzeng-VirtualBox:~/develop$ ./gcd -r 500000 -n 10 gcd0: elapsed 9914 gcd1: elapsed 2309 gcd2: elapsed 2779 gcd3: elapsed 2228 gcd4: elapsed 2709 PASS [ avoid #defining a CONFIG_ variable] Signed-off-by: Zhaoxiu Zeng <> Signed-off-by: George Spelvin <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
2016-05-20printk/nmi: generic solution for safe printk in NMIPetr Mladek1-0/+1
printk() takes some locks and could not be used a safe way in NMI context. The chance of a deadlock is real especially when printing stacks from all CPUs. This particular problem has been addressed on x86 by the commit a9edc8809328 ("x86/nmi: Perform a safe NMI stack trace on all CPUs"). The patchset brings two big advantages. First, it makes the NMI backtraces safe on all architectures for free. Second, it makes all NMI messages almost safe on all architectures (the temporary buffer is limited. We still should keep the number of messages in NMI context at minimum). Note that there already are several messages printed in NMI context: WARN_ON(in_nmi()), BUG_ON(in_nmi()), anything being printed out from MCE handlers. These are not easy to avoid. This patch reuses most of the code and makes it generic. It is useful for all messages and architectures that support NMI. The alternative printk_func is set when entering and is reseted when leaving NMI context. It queues IRQ work to copy the messages into the main ring buffer in a safe context. __printk_nmi_flush() copies all available messages and reset the buffer. Then we could use a simple cmpxchg operations to get synchronized with writers. There is also used a spinlock to get synchronized with other flushers. We do not longer use seq_buf because it depends on external lock. It would be hard to make all supported operations safe for a lockless use. It would be confusing and error prone to make only some operations safe. The code is put into separate printk/nmi.c as suggested by Steven Rostedt. It needs a per-CPU buffer and is compiled only on architectures that call nmi_enter(). This is achieved by the new HAVE_NMI Kconfig flag. The are MN10300 and Xtensa architectures. We need to clean up NMI handling there first. Let's do it separately. The patch is heavily based on the draft from Peter Zijlstra, see [ printk-nmi: use %zu format string for size_t] [ min_t->min - all types are size_t here] Signed-off-by: Petr Mladek <> Suggested-by: Peter Zijlstra <> Suggested-by: Steven Rostedt <> Cc: Jan Kara <> Acked-by: Russell King <> [arm part] Cc: Daniel Thompson <> Cc: Jiri Kosina <> Cc: Ingo Molnar <> Cc: Thomas Gleixner <> Cc: Ralf Baechle <> Cc: Benjamin Herrenschmidt <> Cc: Martin Schwidefsky <> Cc: David Miller <> Cc: Daniel Thompson <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
2016-05-20exit_thread: remove empty bodiesJiri Slaby1-0/+1
Define HAVE_EXIT_THREAD for archs which want to do something in exit_thread. For others, let's define exit_thread as an empty inline. This is a cleanup before we change the prototype of exit_thread to accept a task parameter. [ fix mips] Signed-off-by: Jiri Slaby <> Cc: "David S. Miller" <> Cc: "H. Peter Anvin" <> Cc: "James E.J. Bottomley" <> Cc: Aurelien Jacquiot <> Cc: Benjamin Herrenschmidt <> Cc: Catalin Marinas <> Cc: Chen Liqin <> Cc: Chris Metcalf <> Cc: Chris Zankel <> Cc: David Howells <> Cc: Fenghua Yu <> Cc: Geert Uytterhoeven <> Cc: Guan Xuetao <> Cc: Haavard Skinnemoen <> Cc: Hans-Christian Egtvedt <> Cc: Heiko Carstens <> Cc: Helge Deller <> Cc: Ingo Molnar <> Cc: Ivan Kokshaysky <> Cc: James Hogan <> Cc: Jeff Dike <> Cc: Jesper Nilsson <> Cc: Jiri Slaby <> Cc: Jonas Bonn <> Cc: Koichi Yasutake <> Cc: Lennox Wu <> Cc: Ley Foon Tan <> Cc: Mark Salter <> Cc: Martin Schwidefsky <> Cc: Matt Turner <> Cc: Max Filippov <> Cc: Michael Ellerman <> Cc: Michal Simek <> Cc: Mikael Starvik <> Cc: Paul Mackerras <> Cc: Peter Zijlstra <> Cc: Ralf Baechle <> Cc: Rich Felker <> Cc: Richard Henderson <> Cc: Richard Kuo <> Cc: Richard Weinberger <> Cc: Russell King <> Cc: Steven Miao <> Cc: Thomas Gleixner <> Cc: Tony Luck <> Cc: Vineet Gupta <> Cc: Will Deacon <> Cc: Yoshinori Sato <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
2016-05-17Merge tag 'gpio-v4.7-1' of ↵Linus Torvalds1-1/+0
git:// Pull GPIO updates from Linus Walleij: "This is the bulk of GPIO changes for kernel cycle v4.7: Core infrastructural changes: - Support for natively single-ended GPIO driver stages. This means that if the hardware has registers to configure open drain or open source configuration, we use that rather than (as we did before) try to emulate it by switching the line to an input to get high impedance. This is also documented throughly in Documentation/gpio/driver.txt for those of you who did not understand one word of what I just wrote. - Start to do away with the unnecessarily complex and unitelligible ARCH_REQUIRE_GPIOLIB and ARCH_WANT_OPTIONAL_GPIOLIB, another evolutional artifact from the time when the GPIO subsystem was unmaintained. Archs can now just select GPIOLIB and be done with it, cleanups to arches will trickle in for the next kernel. Some minor archs ACKed the changes immediately so these are included in this pull request. - Advancing the use of the data pointer inside the GPIO device for storing driver data by switching the PowerPC, Super-H Unicore and a few other subarches or subsystem drivers in ALSA SoC, Input, serial, SSB, staging etc to use it. - The initialization now reads the input/output state of the GPIO lines, so that each GPIO descriptor knows - if this callback is implemented - whether the line is input or output. This also reflects nicely in userspace "lsgpio". - It is now possible to name GPIO producer names, line names, from the device tree. (Platform data has been supported for a while). I bet we will get a similar mechanism for ACPI one of those days. This makes is possible to get sensible producer names for e.g. GPIO rails in "lsgpio" in userspace. New drivers: - New driver for the Loongson1. - The XLP driver now supports Broadcom Vulcan ARM64. - The IT87 driver now supports IT8620 and IT8628. - The PCA953X driver now supports Galileo Gen2. Driver improvements: - MCP23S08 was switched to use the gpiolib irqchip helpers and now also suppors level-triggered interrupts. - 74x164 and RCAR now supports the .set_multiple() callback - AMDPT was converted to use generic GPIO. - TC3589x, TPS65218, SX150X, F7188X, MENZ127, VX855, WM831X, WM8994 support the new single ended callback for open drain and in some cases open source. - Implement the .get_direction() callback for a few more drivers like PL061, Xgene. Cleanups: - Paul Gortmaker combed through the drivers and de-modularized those who are not really modules. - Move the GPIO poweroff DT bindings to the power subdir where they belong. - Rename gpio-generic.c to gpio-mmio.c, which is much more to the point. That's what it is handling, nothing more, nothing less" * tag 'gpio-v4.7-1' of git:// (126 commits) MIPS: do away with ARCH_[WANT_OPTIONAL|REQUIRE]_GPIOLIB gpio: zevio: make it explicitly non-modular gpio: timberdale: make it explicitly non-modular gpio: stmpe: make it explicitly non-modular gpio: sodaville: make it explicitly non-modular pinctrl: sh-pfc: Let gpio_chip.to_irq() return zero on error gpio: dwapb: Add ACPI device ID for DWAPB GPIO controller on X-Gene platforms gpio: dt-bindings: add wd,mbl-gpio bindings gpio: of: make it possible to name GPIO lines gpio: make gpiod_to_irq() return negative for NO_IRQ gpio: xgene: implement .get_direction() gpio: xgene: Enable ACPI support for X-Gene GFC GPIO driver gpio: tegra: Implement gpio_get_direction callback gpio: set up initial state from .get_direction() gpio: rename gpio-generic.c into gpio-mmio.c gpio: generic: fix GPIO_GENERIC_PLATFORM is set to module case gpio: dwapb: add gpio-signaled acpi event support gpio: dwapb: convert device node to fwnode gpio: dwapb: remove name from dwapb_port_property gpio/qoriq: select IRQ_DOMAIN ...
2016-05-16bpf: split HAVE_BPF_JIT into cBPF and eBPF variantDaniel Borkmann1-1/+1
Split the HAVE_BPF_JIT into two for distinguishing cBPF and eBPF JITs. Current cBPF ones: # git grep -n HAVE_CBPF_JIT arch/ arch/arm/Kconfig:44: select HAVE_CBPF_JIT arch/mips/Kconfig:18: select HAVE_CBPF_JIT if !CPU_MICROMIPS arch/powerpc/Kconfig:129: select HAVE_CBPF_JIT arch/sparc/Kconfig:35: select HAVE_CBPF_JIT Current eBPF ones: # git grep -n HAVE_EBPF_JIT arch/ arch/arm64/Kconfig:61: select HAVE_EBPF_JIT arch/s390/Kconfig:126: select HAVE_EBPF_JIT if PACK_STACK && HAVE_MARCH_Z196_FEATURES arch/x86/Kconfig:94: select HAVE_EBPF_JIT if X86_64 Later code also needs this facility to check for eBPF JITs. Signed-off-by: Daniel Borkmann <> Acked-by: Alexei Starovoitov <> Signed-off-by: David S. Miller <>
2016-04-26sparc: remove ARCH_WANT_OPTIONAL_GPIOLIBLinus Walleij1-1/+0
This symbols is not needed to get access to selecting the GPIOLIB anymore: any arch can select GPIOLIB. Cc: Michael Büsch <> Cc: Acked-by: David S. Miller <> Signed-off-by: Linus Walleij <>
2016-01-20dma-mapping: always provide the dma_map_ops based implementationChristoph Hellwig1-1/+0
Move the generic implementation to <linux/dma-mapping.h> now that all architectures support it and remove the HAVE_DMA_ATTR Kconfig symbol now that everyone supports them. [ remove leftovers in Kconfig] Signed-off-by: Christoph Hellwig <> Cc: "David S. Miller" <> Cc: Aurelien Jacquiot <> Cc: Chris Metcalf <> Cc: David Howells <> Cc: Geert Uytterhoeven <> Cc: Haavard Skinnemoen <> Cc: Hans-Christian Egtvedt <> Cc: Helge Deller <> Cc: James Hogan <> Cc: Jesper Nilsson <> Cc: Koichi Yasutake <> Cc: Ley Foon Tan <> Cc: Mark Salter <> Cc: Mikael Starvik <> Cc: Steven Miao <> Cc: Vineet Gupta <> Cc: Christian Borntraeger <> Cc: Joerg Roedel <> Cc: Sebastian Ott <> Signed-off-by: Valentin Rothberg <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
2016-01-16Kconfig: remove HAVE_LATENCYTOP_SUPPORTWill Deacon1-4/+0
As illustrated by commit a3afe70b83fd ("[S390] latencytop s390 support."), HAVE_LATENCYTOP_SUPPORT is defined by an architecture to advertise an implementation of save_stack_trace_tsk. However, as of 9212ddb5eada ("stacktrace: provide save_stack_trace_tsk() weak alias") a dummy implementation is provided if STACKTRACE=y. Given that LATENCYTOP already depends on STACKTRACE_SUPPORT and selects STACKTRACE, we can remove HAVE_LATENCYTOP_SUPPORT altogether. Signed-off-by: Will Deacon <> Acked-by: Heiko Carstens <> Cc: Vineet Gupta <> Cc: Russell King <> Cc: James Hogan <> Cc: Michal Simek <> Cc: Helge Deller <> Acked-by: Michael Ellerman <> Cc: "David S. Miller" <> Cc: Guan Xuetao <> Cc: Ingo Molnar <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
2015-06-25sparc: time: Replace update_persistent_clock() with CONFIG_RTC_SYSTOHCXunlei Pang1-1/+1
On Sparc systems, update_persistent_clock() uses RTC drivers to do the job, it makes more sense to hand it over to CONFIG_RTC_SYSTOHC. In the long run, all the update_persistent_clock() should migrate to proper class RTC drivers if any and use CONFIG_RTC_SYSTOHC instead. Signed-off-by: Xunlei Pang <> Acked-by: David S. Miller <> Signed-off-by: Alexandre Belloni <>
2015-04-14sparc: expose number of page table levelsKirill A. Shutemov1-0/+4
We would want to use number of page table level to define mm_struct. Let's expose it as CONFIG_PGTABLE_LEVELS. Signed-off-by: Kirill A. Shutemov <> Cc: "David S. Miller" <> Tested-by: Guenter Roeck <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
2015-03-18sparc: Fix /proc/kcoreDavid S. Miller1-0/+3
/proc/kcore investigates the "System RAM" elements in /proc/iomem to initialize it's memory tables. Therefore we have to register them before it tries to do so. kcore uses device_initcall() so let's use arch_initcall() for the registry. Also we need ARCH_PROC_KCORE_TEXT to get the virtual addresses of the kernel image correct. Reported-by: David Ahern <> Signed-off-by: David S. Miller <>
2014-10-05sparc64: sparse irqbob picco1-0/+1
This patch attempts to do a few things. The highlights are: 1) enable SPARSE_IRQ unconditionally, 2) kills off !SPARSE_IRQ code 3) allocates ivector_table at boot time and 4) default to cookie only VIRQ mechanism for supported firmware. The first firmware with cookie only support for me appears on T5. You can optionally force the HV firmware to not cookie only mode which is the sysino support. The sysino is a deprecated HV mechanism according to the most recent SPARC Virtual Machine Specification. HV_GRP_INTR is what controls the cookie/sysino firmware versioning. The history of this interface is: 1) Major version 1.0 only supported sysino based interrupt interfaces. 2) Major version 2.0 added cookie based VIRQs, however due to the fact that OSs were using the VIRQs without negoatiating major version 2.0 (Linux and Solaris are both guilty), the VIRQs calls were allowed even with major version 1.0 To complicate things even further, the VIRQ interfaces were only actually hooked up in the hypervisor for LDC interrupt sources. VIRQ calls on other device types would result in HV_EINVAL errors. So effectively, major version 2.0 is unusable. 3) Major version 3.0 was created to signal use of VIRQs and the fact that the hypervisor has these calls hooked up for all interrupt sources, not just those for LDC devices. A new boot option is provided should cookie only HV support have issues. hvirq - this is the version for HV_GRP_INTR. This is related to HV API versioning. The code attempts major=3 first by default. The option can be used to override this default. I've tested with SPARSE_IRQ on T5-8, M7-4 and T4-X and Jalap?no. Signed-off-by: Bob Picco <> Signed-off-by: David S. Miller <>
2014-08-08lib/scatterlist: make ARCH_HAS_SG_CHAIN an actual KconfigLaura Abbott1-0/+1
Rather than have architectures #define ARCH_HAS_SG_CHAIN in an architecture specific scatterlist.h, make it a proper Kconfig option and use that instead. At same time, remove the header files are are now mostly useless and just include asm-generic/scatterlist.h. [ powerpc files now need asm/dma.h] Signed-off-by: Laura Abbott <> Acked-by: Thomas Gleixner <> [x86] Acked-by: Benjamin Herrenschmidt <> [powerpc] Acked-by: Heiko Carstens <> Cc: Russell King <> Cc: Tony Luck <> Cc: Fenghua Yu <> Cc: Paul Mackerras <> Cc: Ingo Molnar <> Cc: "H. Peter Anvin" <> Cc: "James E.J. Bottomley" <> Cc: Martin Schwidefsky <> Signed-off-by: Stephen Rothwell <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
2014-08-04Merge tag 'trace-3.17' of ↵Linus Torvalds1-1/+0
git:// Pull tracing updates from Steven Rostedt: "This pull request has a lot of work done. The main thing is the changes to the ftrace function callback infrastructure. It's introducing a way to allow different functions to call directly different trampolines instead of all calling the same "mcount" one. The only user of this for now is the function graph tracer, which always had a different trampoline, but the function tracer trampoline was called and did basically nothing, and then the function graph tracer trampoline was called. The difference now, is that the function graph tracer trampoline can be called directly if a function is only being traced by the function graph trampoline. If function tracing is also happening on the same function, the old way is still done. The accounting for this takes up more memory when function graph tracing is activated, as it needs to keep track of which functions it uses. I have a new way that wont take as much memory, but it's not ready yet for this merge window, and will have to wait for the next one. Another big change was the removal of the ftrace_start/stop() calls that were used by the suspend/resume code that stopped function tracing when entering into suspend and resume paths. The stop of ftrace was done because there was some function that would crash the system if one called smp_processor_id()! The stop/start was a big hammer to solve the issue at the time, which was when ftrace was first introduced into Linux. Now ftrace has better infrastructure to debug such issues, and I found the problem function and labeled it with "notrace" and function tracing can now safely be activated all the way down into the guts of suspend and resume Other changes include clean ups of uprobe code, clean up of the trace_seq() code, and other various small fixes and clean ups to ftrace and tracing" * tag 'trace-3.17' of git:// (57 commits) ftrace: Add warning if tramp hash does not match nr_trampolines ftrace: Fix trampoline hash update check on rec->flags ring-buffer: Use rb_page_size() instead of open coded head_page size ftrace: Rename ftrace_ops field from trampolines to nr_trampolines tracing: Convert local function_graph functions to static ftrace: Do not copy old hash when resetting tracing: let user specify tracing_thresh after selecting function_graph ring-buffer: Always run per-cpu ring buffer resize with schedule_work_on() tracing: Remove function_trace_stop and HAVE_FUNCTION_TRACE_MCOUNT_TEST s390/ftrace: remove check of obsolete variable function_trace_stop arm64, ftrace: Remove check of obsolete variable function_trace_stop Blackfin: ftrace: Remove check of obsolete variable function_trace_stop metag: ftrace: Remove check of obsolete variable function_trace_stop microblaze: ftrace: Remove check of obsolete variable function_trace_stop MIPS: ftrace: Remove check of obsolete variable function_trace_stop parisc: ftrace: Remove check of obsolete variable function_trace_stop sh: ftrace: Remove check of obsolete variable function_trace_stop sparc64,ftrace: Remove check of obsolete variable function_trace_stop tile: ftrace: Remove check of obsolete variable function_trace_stop ftrace: x86: Remove check of obsolete variable function_trace_stop ...
2014-07-18sparc64,ftrace: Remove check of obsolete variable function_trace_stopSteven Rostedt (Red Hat)1-1/+0
Nothing sets function_trace_stop to disable function tracing anymore. Remove the check for it in the arch code. Link: Cc: David S. Miller <> OKed-to-go-through-tracing-tree-by: David S. Miller <> Signed-off-by: Steven Rostedt <>
2014-07-16locking/mutex: Disable optimistic spinning on some architecturesPeter Zijlstra1-0/+1
The optimistic spin code assumes regular stores and cmpxchg() play nice; this is found to not be true for at least: parisc, sparc32, tile32, metag-lock1, arc-!llsc and hexagon. There is further wreckage, but this in particular seemed easy to trigger, so blacklist this. Opt in for known good archs. Signed-off-by: Peter Zijlstra <> Reported-by: Mikulas Patocka <> Cc: David Miller <> Cc: Chris Metcalf <> Cc: James Bottomley <> Cc: Vineet Gupta <> Cc: Jason Low <> Cc: Waiman Long <> Cc: "James E.J. Bottomley" <> Cc: Paul McKenney <> Cc: John David Anglin <> Cc: James Hogan <> Cc: Linus Torvalds <> Cc: Davidlohr Bueso <> Cc: Cc: Benjamin Herrenschmidt <> Cc: Catalin Marinas <> Cc: Russell King <> Cc: Will Deacon <> Cc: Cc: Cc: Cc: Link: Signed-off-by: Ingo Molnar <>
2014-04-12Merge git:// Torvalds1-0/+1
Pull audit updates from Eric Paris. * git:// (28 commits) AUDIT: make audit_is_compat depend on CONFIG_AUDIT_COMPAT_GENERIC audit: renumber AUDIT_FEATURE_CHANGE into the 1300 range audit: do not cast audit_rule_data pointers pointlesly AUDIT: Allow login in non-init namespaces audit: define audit_is_compat in kernel internal header kernel: Use RCU_INIT_POINTER(x, NULL) in audit.c sched: declare pid_alive as inline audit: use uapi/linux/audit.h for AUDIT_ARCH declarations syscall_get_arch: remove useless function arguments audit: remove stray newline from audit_log_execve_info() audit_panic() call audit: remove stray newlines from audit_log_lost messages audit: include subject in login records audit: remove superfluous new- prefix in AUDIT_LOGIN messages audit: allow user processes to log from another PID namespace audit: anchor all pid references in the initial pid namespace audit: convert PPIDs to the inital PID namespace. pid: get pid_t ppid of task in init_pid_ns audit: rename the misleading audit_get_context() to audit_take_context() audit: Add generic compat syscall support audit: Add CONFIG_HAVE_ARCH_AUDITSYSCALL ...
2014-03-20audit: Add CONFIG_HAVE_ARCH_AUDITSYSCALLAKASHI Takahiro1-0/+1
Currently AUDITSYSCALL has a long list of architecture depencency: depends on AUDIT && (X86 || PARISC || PPC || S390 || IA64 || UML || SPARC64 || SUPERH || (ARM && AEABI && !OABI_COMPAT) || ALPHA) The purpose of this patch is to replace it with HAVE_ARCH_AUDITSYSCALL for simplicity. Signed-off-by: AKASHI Takahiro <> Acked-by: Will Deacon <> (arm) Acked-by: Richard Guy Briggs <> (audit) Acked-by: Matt Turner <> (alpha) Acked-by: Michael Ellerman <> (powerpc) Signed-off-by: Eric Paris <>
2014-02-19sparc32: fix build failure for arch_jump_label_transformPaul Gortmaker1-1/+1
In arch/sparc/Kernel/Makefile, we see: obj-$(CONFIG_SPARC64) += jump_label.o However, the Kconfig selects HAVE_ARCH_JUMP_LABEL unconditionally for all SPARC. This in turn leads to the following failure when doing allmodconfig coverage builds: kernel/built-in.o: In function `__jump_label_update': jump_label.c:(.text+0x8560c): undefined reference to `arch_jump_label_transform' kernel/built-in.o: In function `arch_jump_label_transform_static': (.text+0x85cf4): undefined reference to `arch_jump_label_transform' make: *** [vmlinux] Error 1 Change HAVE_ARCH_JUMP_LABEL to be conditional on SPARC64 so that it matches the Makefile. Signed-off-by: Paul Gortmaker <> Signed-off-by: David S. Miller <>
2014-01-24Merge branch 'for-linus' of ↵Linus Torvalds1-0/+1
git:// Pull input subsystem updates from Dmitry Torokhov: "Just a swath of driver fixes and cleanups, no new drivers this time (although ALPS now supports one of the newer protocols, more to come)" * 'for-linus' of git:// (57 commits) Input: wacom - add support for DTU-1031 Input: wacom - fix wacom->shared guards for dual input devices Input: edt_ft5x06 - use devm_* functions where appropriate Input: hyperv-keyboard - pass through 0xE1 prefix Input: logips2pp - fix spelling s/reciver/receiver/ Input: delete non-required instances of include <linux/init.h> Input: twl4030-keypad - convert to using managed resources Input: twl6040-vibra - remove unneeded check for CONFIG_OF Input: twl4030-keypad - add device tree support Input: twl6040-vibra - add missing of_node_put Input: twl4030-vibra - add missing of_node_put Input: i8042 - cleanup SERIO_I8042 dependencies Input: i8042 - select ARCH_MIGHT_HAVE_PC_SERIO on x86 Input: i8042 - select ARCH_MIGHT_HAVE_PC_SERIO on unicore32 Input: i8042 - select ARCH_MIGHT_HAVE_PC_SERIO on sparc Input: i8042 - select ARCH_MIGHT_HAVE_PC_SERIO for SH_CAYMAN Input: i8042 - select ARCH_MIGHT_HAVE_PC_SERIO on powerpc Input: i8042 - select ARCH_MIGHT_HAVE_PC_SERIO on mips Input: i8042 - select ARCH_MIGHT_HAVE_PC_SERIO on IA64 Input: i8042 - select ARCH_MIGHT_HAVE_PC_SERIO on ARM/Footbridge ...
2014-01-23Kconfig: update flightly outdated CONFIG_SMP documentationRobert Graffham1-2/+2
Remove an outdated reference to "most personal computers" having only one CPU, and change the use of "singleprocessor" and "single processor" in CONFIG_SMP's documentation to "uniprocessor" across all arches where that documentation is present. Signed-off-by: Robert Graffham <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
2014-01-02Input: i8042 - select ARCH_MIGHT_HAVE_PC_SERIO on sparcMark Salter1-0/+1
Architectures which might use an i8042 for serial IO to keyboard, mouse, etc should select ARCH_MIGHT_HAVE_PC_SERIO. Signed-off-by: Mark Salter <> Acked-by: "David S. Miller" <> Signed-off-by: Dmitry Torokhov <>
2013-11-15Merge tag 'for-linus' of git:// Torvalds1-0/+1
Pull Kconfig cleanups from Mark Salter: "Remove some unused config options from C6X and clean up PC_PARPORT dependencies. The latter was discussed here:" * tag 'for-linus' of git:// c6x: remove unused COMMON_CLKDEV Kconfig parameter Kconfig cleanup (PARPORT_PC dependencies) x86: select ARCH_MIGHT_HAVE_PC_PARPORT unicore32: select ARCH_MIGHT_HAVE_PC_PARPORT sparc: select ARCH_MIGHT_HAVE_PC_PARPORT sh: select ARCH_MIGHT_HAVE_PC_PARPORT powerpc: select ARCH_MIGHT_HAVE_PC_PARPORT parisc: select ARCH_MIGHT_HAVE_PC_PARPORT mips: select ARCH_MIGHT_HAVE_PC_PARPORT microblaze: select ARCH_MIGHT_HAVE_PC_PARPORT m68k: select ARCH_MIGHT_HAVE_PC_PARPORT ia64: select ARCH_MIGHT_HAVE_PC_PARPORT arm: select ARCH_MIGHT_HAVE_PC_PARPORT alpha: select ARCH_MIGHT_HAVE_PC_PARPORT c6x: remove unused parameter in Kconfig
2013-11-15Merge git:// Torvalds1-0/+1
Pull sparc update from David Miller: 1) Implement support for up to 47-bit physical addresses on sparc64. 2) Support HAVE_CONTEXT_TRACKING on sparc64, from Kirill Tkhai. 3) Fix Simba bridge window calculations, from Kjetil Oftedal. * git:// sparc64: Implement HAVE_CONTEXT_TRACKING sparc64: Add self-IPI support for smp_send_reschedule() sparc: PCI: Fix incorrect address calculation of PCI Bridge windows on Simba-bridges sparc64: Encode huge PMDs using PTE encoding. sparc64: Move to 64-bit PGDs and PMDs. sparc64: Move from 4MB to 8MB huge pages. sparc64: Make PAGE_OFFSET variable. sparc64: Fix inconsistent max-physical-address defines. sparc64: Document the shift counts used to validate linear kernel addresses. sparc64: Define PAGE_OFFSET in terms of physical address bits. sparc64: Use PAGE_OFFSET instead of a magic constant. sparc64: Clean up 64-bit mmap exclusion defines.
2013-11-15kernel: remove CONFIG_USE_GENERIC_SMP_HELPERSChristoph Hellwig1-1/+0
We've switched over every architecture that supports SMP to it, so remove the new useless config variable. Signed-off-by: Christoph Hellwig <> Cc: Jan Kara <> Cc: Jens Axboe <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
2013-11-14sparc64: Implement HAVE_CONTEXT_TRACKINGKirill Tkhai1-0/+1
Mark the places when the system are in user or are in kernel. This is used to make full dynticks system (tickless) -- CONFIG_NO_HZ_FULL dependence. Signed-off-by: Kirill Tkhai <> CC: David Miller <> Signed-off-by: David S. Miller <>
2013-10-23sparc: select ARCH_MIGHT_HAVE_PC_PARPORTMark Salter1-0/+1
Architectures which support CONFIG_PARPORT_PC should select ARCH_MIGHT_HAVE_PC_PARPORT. Signed-off-by: Mark Salter <> CC: "David S. Miller" <> CC:
2013-10-02sparc: fix MSI build failure on Sparc32Thomas Petazzoni1-1/+6
Commit ebd97be635 ('PCI: remove ARCH_SUPPORTS_MSI kconfig option') removes the ARCH_SUPPORTS_MSI Kconfig option that allowed architectures to indicate whether they support PCI MSI or not. Now, PCI MSI support can be compiled in on any architecture thanks to the use of weak functions thanks to 4287d824f265 ('PCI: use weak functions for MSI arch-specific functions'). So, architecture specific code is now responsible to ensure that its PCI MSI code builds in all cases, or be appropriately conditionally compiled. On Sparc, the MSI support is only provided for Sparc64, so the ARCH_SUPPORTS_MSI kconfig option was only selected for SPARC64, and not for the Sparc architecture as a whole. Therefore, removing ARCH_SUPPORTS_MSI broke Sparc32 configurations with CONFIG_PCI_MSI=y, because the Sparc-specific MSI code is not designed to be built on Sparc32. To solve this, this commit ensures that the Sparc MSI code is only built on Sparc64. This is done thanks to a new Kconfig Makefile helper option SPARC64_PCI_MSI, modeled after the existing SPARC64_PCI. The SPARC64_PCI_MSI option is an hidden option that is true when both Sparc64 PCI support is enabled and MSI is enabled. The arch/sparc/kernel/pci_msi.c file is now only built when SPARC64_PCI_MSI is true. Signed-off-by: Thomas Petazzoni <> Reported-by: Guenter Roeck <> Tested-by: Guenter Roeck <> Signed-off-by: David S. Miller <>
2013-09-13Remove GENERIC_HARDIRQ config optionMartin Schwidefsky1-1/+0
After the last architecture switched to generic hard irqs the config options HAVE_GENERIC_HARDIRQS & GENERIC_HARDIRQS and the related code for !CONFIG_GENERIC_HARDIRQS can be removed. Signed-off-by: Martin Schwidefsky <>
2013-08-12PCI: remove ARCH_SUPPORTS_MSI kconfig optionThomas Petazzoni1-1/+0
Now that we have weak versions for each of the PCI MSI architecture functions, we can actually build the MSI support for all platforms, regardless of whether they provide or not architecture-specific versions of those functions. For this reason, the ARCH_SUPPORTS_MSI hidden kconfig boolean becomes useless, and this patch gets rid of it. Signed-off-by: Thomas Petazzoni <> Acked-by: Bjorn Helgaas <> Acked-by: Benjamin Herrenschmidt <> Tested-by: Daniel Price <> Tested-by: Thierry Reding <> Cc: Benjamin Herrenschmidt <> Cc: Paul Mackerras <> Cc: Cc: Martin Schwidefsky <> Cc: Heiko Carstens <> Cc: Cc: Cc: Thomas Gleixner <> Cc: Ingo Molnar <> Cc: H. Peter Anvin <> Cc: Cc: Russell King <> Cc: Tony Luck <> Cc: Fenghua Yu <> Cc: Cc: Ralf Baechle <> Cc: Cc: David S. Miller <> Cc: Cc: Chris Metcalf <> Signed-off-by: Jason Cooper <>
2013-06-03Finally eradicate CONFIG_HOTPLUGStephen Rothwell1-1/+0
Ever since commit 45f035ab9b8f ("CONFIG_HOTPLUG should be always on"), it has been basically impossible to build a kernel with CONFIG_HOTPLUG turned off. Remove all the remaining references to it. Cc: Russell King <> Cc: Doug Thompson <> Cc: Bjorn Helgaas <> Cc: Steven Whitehouse <> Cc: Arnd Bergmann <> Cc: Pavel Machek <> Cc: "Rafael J. Wysocki" <> Cc: Andrew Morton <> Signed-off-by: Stephen Rothwell <> Acked-by: Mauro Carvalho Chehab <> Acked-by: Hans Verkuil <> Signed-off-by: Greg Kroah-Hartman <>
2013-05-09Merge tag 'gpio-for-linus' of git:// Torvalds1-5/+0
Pull removal of GENERIC_GPIO from Grant Likely: "GENERIC_GPIO now synonymous with GPIOLIB. There are no longer any valid cases for enableing GENERIC_GPIO without GPIOLIB, even though it is possible to do so which has been causing confusion and breakage. This branch does the work to completely eliminate GENERIC_GPIO." * tag 'gpio-for-linus' of git:// gpio: update gpio Chinese documentation Remove GENERIC_GPIO config option Convert selectors of GENERIC_GPIO to GPIOLIB blackfin: force use of gpiolib m68k: coldfire: use gpiolib mips: pnx833x: remove requirement for GENERIC_GPIO openrisc: default GENERIC_GPIO to false avr32: default GENERIC_GPIO to false xtensa: remove explicit selection of GENERIC_GPIO sh: replace CONFIG_GENERIC_GPIO by CONFIG_GPIOLIB powerpc: remove redundant GENERIC_GPIO selection unicore32: default GENERIC_GPIO to false unicore32: remove unneeded select GENERIC_GPIO arm: plat-orion: use GPIO driver on CONFIG_GPIOLIB arm: remove redundant GENERIC_GPIO selection mips: alchemy: require gpiolib mips: txx9: change GENERIC_GPIO to GPIOLIB mips: loongson: use GPIO driver on CONFIG_GPIOLIB mips: remove redundant GENERIC_GPIO select
2013-05-04Merge git:// S. Miller1-24/+2
Merge sparc bug fixes that didn't make it into v3.9 into sparc-next. Signed-off-by: David S. Miller <>
2013-05-01Merge branch 'for-linus' of ↵Linus Torvalds1-1/+0
git:// Pull compat cleanup from Al Viro: "Mostly about syscall wrappers this time; there will be another pile with patches in the same general area from various people, but I'd rather push those after both that and vfs.git pile are in." * 'for-linus' of git:// syscalls.h: slightly reduce the jungles of macros get rid of union semop in sys_semctl(2) arguments make do_mremap() static sparc: no need to sign-extend in sync_file_range() wrapper ppc compat wrappers for add_key(2) and request_key(2) are pointless x86: trim sys_ia32.h x86: sys32_kill and sys32_mprotect are pointless get rid of compat_sys_semctl() and friends in case of ARCH_WANT_OLD_COMPAT_IPC merge compat sys_ipc instances consolidate compat lookup_dcookie() convert vmsplice to COMPAT_SYSCALL_DEFINE switch getrusage() to COMPAT_SYSCALL_DEFINE switch epoll_pwait to COMPAT_SYSCALL_DEFINE convert sendfile{,64} to COMPAT_SYSCALL_DEFINE switch signalfd{,4}() to COMPAT_SYSCALL_DEFINE make SYSCALL_DEFINE<n>-generated wrappers do asmlinkage_protect make HAVE_SYSCALL_WRAPPERS unconditional consolidate cond_syscall and SYSCALL_ALIAS declarations teach SYSCALL_DEFINE<n> how to deal with long long/unsigned long long get rid of duplicate logics in __SC_....[1-6] definitions
2013-04-30Merge tag 'pm+acpi-3.10-rc1' of ↵Linus Torvalds1-23/+0
git:// Pull power management and ACPI updates from Rafael J Wysocki: - ARM big.LITTLE cpufreq driver from Viresh Kumar. - exynos5440 cpufreq driver from Amit Daniel Kachhap. - cpufreq core cleanup and code consolidation from Viresh Kumar and Stratos Karafotis. - cpufreq scalability improvement from Nathan Zimmer. - AMD "frequency sensitivity feedback" powersave bias for the ondemand cpufreq governor from Jacob Shin. - cpuidle code consolidation and cleanups from Daniel Lezcano. - ARM OMAP cpuidle fixes from Santosh Shilimkar and Daniel Lezcano. - ACPICA fixes and other improvements from Bob Moore, Jung-uk Kim, Lv Zheng, Yinghai Lu, Tang Chen, Colin Ian King, and Linn Crosetto. - ACPI core updates related to hotplug from Toshi Kani, Paul Bolle, Yasuaki Ishimatsu, and Rafael J Wysocki. - Intel Lynxpoint LPSS (Low-Power Subsystem) support improvements from Rafael J Wysocki and Andy Shevchenko. * tag 'pm+acpi-3.10-rc1' of git:// (192 commits) cpufreq: Revert incorrect commit 5800043 cpufreq: MAINTAINERS: Add co-maintainer cpuidle: add maintainer entry ACPI / thermal: do not always return THERMAL_TREND_RAISING for active trip points ARM: s3c64xx: cpuidle: use init/exit common routine cpufreq: pxa2xx: initialize variables ACPI: video: correct acpi_video_bus_add error processing SH: cpuidle: use init/exit common routine ARM: S5pv210: compiling issue, ARM_S5PV210_CPUFREQ needs CONFIG_CPU_FREQ_TABLE=y ACPI: Fix wrong parameter passed to memblock_reserve cpuidle: fix comment format pnp: use %*phC to dump small buffers isapnp: remove debug leftovers ARM: imx: cpuidle: use init/exit common routine ARM: davinci: cpuidle: use init/exit common routine ARM: kirkwood: cpuidle: use init/exit common routine ARM: calxeda: cpuidle: use init/exit common routine ARM: tegra: cpuidle: use init/exit common routine for tegra3 ARM: tegra: cpuidle: use init/exit common routine for tegra2 ARM: OMAP4: cpuidle: use init/exit common routine ...
2013-04-16Remove GENERIC_GPIO config optionAlexandre Courbot1-5/+0
GENERIC_GPIO has been made equivalent to GPIOLIB in architecture code and all driver code has been switch to depend on GPIOLIB. It is thus safe to have GENERIC_GPIO removed. Signed-off-by: Alexandre Courbot <> Acked-by: Linus Walleij <> Acked-by: Grant Likely <>
2013-04-10cpufreq: sparc: move cpufreq driver to drivers/cpufreqViresh Kumar1-23/+0
This patch moves cpufreq driver of SPARC architecture to drivers/cpufreq. Signed-off-by: Viresh Kumar <> Acked-by: David S. Miller <> Signed-off-by: Rafael J. Wysocki <>
2013-04-09USB: remove USB_EHCI_BIG_ENDIAN_{DESC,MMIO} depends on architecture symbolFlorian Fainelli1-0/+2
Just like the OHCI counter part we just can remove the architecture specific symbols which prevent these configuration symbols from being selected by platforms/architectures requiring it. The original implementation did not scale at all since it required each and every single architecture to be added for these configuration symbols to be selected. Now it is up to the EHCI driver and/or platform to select these configuration symbols accordingly. Acked-by: Alan Stern <> Signed-off-by: Florian Fainelli <> Signed-off-by: Greg Kroah-Hartman <>
2013-03-20sparc64: Hibernation supportTkhai Kirill1-0/+7
This patch adds CONFIG_HIBERNATION support for sparc64 architecture. The suspend function is the same as on another platforms. The restore function uses Bypass feature of MMU which allows to make the process more comfortable and plesant. Signed-off-by: Kirill Tkhai <> CC: David Miller <> CC: Sam Ravnborg <> Signed-off-by: David S. Miller <>
2013-03-20sparc,leon: updated GRPCI2 config nameDaniel Hellstrom1-1/+1
Signed-off-by: Daniel Hellstrom <> Acked-by: Sam Ravnborg <> Signed-off-by: David S. Miller <>
2013-03-20sparc,leon: support for GRPCI1 PCI host bridge controllerDaniel Hellstrom1-0/+11
Some of the GRPCI1 cores does not support detection of all PCI errors, the default is therefore limited PCI error handling. The property all_pci_errors my be set by the boot loader to enable interrupt on all PCI errors. Signed-off-by: Daniel Hellstrom <> Acked-by: Sam Ravnborg <> Signed-off-by: David S. Miller <>
2013-03-19sparc: remove unused "config BITS"Paul Bolle1-6/+0
sparc's asm/module.h got removed in commit 786d35d45cc40b2a51a18f73e14e135d47fdced7 ("Make most arch asm/module.h files use asm-generic/module.h"). That removed the only two uses of this Kconfig symbol. So we can remove its entry too. > >From arch/sparc/Makefile: > ifeq ($(CONFIG_SPARC32),y) > [...] > > [...] > export BITS := 32 > [...] > > else > [...] > > [...] > export BITS := 64 > [...] > > So $(BITS) is set depending on whether CONFIG_SPARC32 is set or not. > Using $(BITS) in sparc's Makefiles is not using CONFIG_BITS. That > doesn't count as usage of "config BITS". Signed-off-by: Paul Bolle <> Acked-by: Sam Ravnborg <> Signed-off-by: David S. Miller <>
2013-03-19sparc: delete "if !ULTRA_HAS_POPULATION_COUNT"Paul Bolle1-1/+1
Commit 2d78d4beb64eb07d50665432867971c481192ebf ("[PATCH] bitops: sparc64: use generic bitops") made the default of GENERIC_HWEIGHT depend on !ULTRA_HAS_POPULATION_COUNT. But since there's no Kconfig symbol with that name, this always evaluates to true. Delete this dependency. Signed-off-by: Paul Bolle <> Acked-by: Sam Ravnborg <> Signed-off-by: David S. Miller <>
2013-03-03make HAVE_SYSCALL_WRAPPERS unconditionalAl Viro1-1/+0
Signed-off-by: Al Viro <>
2013-02-27arch Kconfig: centralise CONFIG_ARCH_NO_VIRT_TO_BUSStephen Rothwell1-3/+0
Change it to CONFIG_HAVE_VIRT_TO_BUS and set it in all architecures that already provide virt_to_bus(). Signed-off-by: Stephen Rothwell <> Reviewed-by: James Hogan <> Cc: Bjorn Helgaas <> Cc: H Hartley Sweeten <> Cc: Benjamin Herrenschmidt <> Cc: Paul Mackerras <> Cc: "David S. Miller" <> Cc: Paul Mundt <> Cc: Vineet Gupta <> Cc: James Bottomley <> Cc: <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
2013-02-23Merge branch 'for-linus' of ↵Linus Torvalds1-0/+4
git:// Pull signal handling cleanups from Al Viro: "This is the first pile; another one will come a bit later and will contain SYSCALL_DEFINE-related patches. - a bunch of signal-related syscalls (both native and compat) unified. - a bunch of compat syscalls switched to COMPAT_SYSCALL_DEFINE (fixing several potential problems with missing argument validation, while we are at it) - a lot of now-pointless wrappers killed - a couple of architectures (cris and hexagon) forgot to save altstack settings into sigframe, even though they used the (uninitialized) values in sigreturn; fixed. - microblaze fixes for delivery of multiple signals arriving at once - saner set of helpers for signal delivery introduced, several architectures switched to using those." * 'for-linus' of git:// (143 commits) x86: convert to ksignal sparc: convert to ksignal arm: switch to struct ksignal * passing alpha: pass k_sigaction and siginfo_t using ksignal pointer burying unused conditionals make do_sigaltstack() static arm64: switch to generic old sigaction() (compat-only) arm64: switch to generic compat rt_sigaction() arm64: switch compat to generic old sigsuspend arm64: switch to generic compat rt_sigqueueinfo() arm64: switch to generic compat rt_sigpending() arm64: switch to generic compat rt_sigprocmask() arm64: switch to generic sigaltstack sparc: switch to generic old sigsuspend sparc: COMPAT_SYSCALL_DEFINE does all sign-extension as well as SYSCALL_DEFINE sparc: kill sign-extending wrappers for native syscalls kill sparc32_open() sparc: switch to use of generic old sigaction sparc: switch sys_compat_rt_sigaction() to COMPAT_SYSCALL_DEFINE mips: switch to generic sys_fork() and sys_clone() ...
2013-02-19Merge branch 'irq-core-for-linus' of ↵Linus Torvalds1-1/+0
git:// Pull irq core changes from Ingo Molnar: "The biggest changes are the IRQ-work and printk changes from Frederic Weisbecker, which prepare the code for 'full dynticks' (the ability to stop or slow down the periodic tick arbitrarily, not just in idle time as today): - Don't stop tick with irq works pending. This fix is generally useful and concerns archs that can't raise self IPIs. - Flush irq works before CPU offlining. - Introduce "lazy" irq works that can wait for the next tick to be executed, unless it's stopped. - Implement klogd wake up using irq work. This removes the ad-hoc printk_tick()/printk_needs_cpu() hooks and make it working even in dynticks mode. - Cleanups and fixes." * 'irq-core-for-linus' of git:// genirq: Export enable/disable_percpu_irq() arch Kconfig: Remove references to IRQ_PER_CPU irq_work: Remove return value from the irq_work_queue() function genirq: Avoid deadlock in spurious handling printk: Wake up klogd using irq_work irq_work: Make self-IPIs optable irq_work: Warn if there's still work on cpu_down irq_work: Flush work on CPU_DYING irq_work: Don't stop the tick with pending works nohz: Add API to check tick state irq_work: Remove CONFIG_HAVE_IRQ_WORK irq_work: Fix racy check on work pending flag irq_work: Fix racy IRQ_WORK_BUSY flag setting
2013-02-14burying unused conditionalsAl Viro1-5/+0
2013-02-13sparc64: Add missing HAVE_ARCH_TRANSPARENT_HUGEPAGE.David S. Miller1-0/+1
This got missed in the cleanups done for the S390 THP support. CC: Gerald Schaefer <> Signed-off-by: David S. Miller <>
2013-02-03sparc: switch to generic old sigsuspendAl Viro1-0/+1
Signed-off-by: Al Viro <>