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authorLinus Torvalds <torvalds@linux-foundation.org>2015-11-04 11:30:22 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2015-11-04 11:30:22 -0800
commit14c79092909a52b6fd6394b6ad5e7756c4f9565e (patch)
treec9ab2a50aa00c8888cc90006a0e012782b0ccc19 /arch
parent1b1050cdc5cdde43177b375b5f22dc070d45d8f8 (diff)
parenta01fece2e4185ac173abd16d10304d73d47ebf00 (diff)
downloadlinux-14c79092909a52b6fd6394b6ad5e7756c4f9565e.tar.gz
Merge branch 'parisc-4.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux
Pull parisc updates from Helge Deller: "The most important change is that we reduce L1_CACHE_BYTES to 16 bytes, for which a trivial patch for XPS in the network layer was needed. Then we wire up the sys_membarrier and userfaultfd syscalls and added two other small cleanups" * 'parisc-4.3-2' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux: parisc: Change L1_CACHE_BYTES to 16 net/xps: Fix calculation of initial number of xps queues parisc: reduce syslog debug output parisc: serial/mux: Convert to uart_console_device instead of open-coded parisc: Wire up userfaultfd syscall parisc: allocate sys_membarrier system call number
Diffstat (limited to 'arch')
-rw-r--r--arch/parisc/include/asm/cache.h18
-rw-r--r--arch/parisc/include/uapi/asm/unistd.h4
-rw-r--r--arch/parisc/kernel/syscall_table.S2
3 files changed, 10 insertions, 14 deletions
diff --git a/arch/parisc/include/asm/cache.h b/arch/parisc/include/asm/cache.h
index 47f11c707b65..3d0e17bcc8e9 100644
--- a/arch/parisc/include/asm/cache.h
+++ b/arch/parisc/include/asm/cache.h
@@ -7,20 +7,12 @@
/*
- * PA 2.0 processors have 64-byte cachelines; PA 1.1 processors have
- * 32-byte cachelines. The default configuration is not for SMP anyway,
- * so if you're building for SMP, you should select the appropriate
- * processor type. There is a potential livelock danger when running
- * a machine with this value set too small, but it's more probable you'll
- * just ruin performance.
+ * PA 2.0 processors have 64 and 128-byte L2 cachelines; PA 1.1 processors
+ * have 32-byte cachelines. The L1 length appears to be 16 bytes but this
+ * is not clearly documented.
*/
-#ifdef CONFIG_PA20
-#define L1_CACHE_BYTES 64
-#define L1_CACHE_SHIFT 6
-#else
-#define L1_CACHE_BYTES 32
-#define L1_CACHE_SHIFT 5
-#endif
+#define L1_CACHE_BYTES 16
+#define L1_CACHE_SHIFT 4
#ifndef __ASSEMBLY__
diff --git a/arch/parisc/include/uapi/asm/unistd.h b/arch/parisc/include/uapi/asm/unistd.h
index 2e639d7604f6..33170384d3ac 100644
--- a/arch/parisc/include/uapi/asm/unistd.h
+++ b/arch/parisc/include/uapi/asm/unistd.h
@@ -358,8 +358,10 @@
#define __NR_memfd_create (__NR_Linux + 340)
#define __NR_bpf (__NR_Linux + 341)
#define __NR_execveat (__NR_Linux + 342)
+#define __NR_membarrier (__NR_Linux + 343)
+#define __NR_userfaultfd (__NR_Linux + 344)
-#define __NR_Linux_syscalls (__NR_execveat + 1)
+#define __NR_Linux_syscalls (__NR_userfaultfd + 1)
#define __IGNORE_select /* newselect */
diff --git a/arch/parisc/kernel/syscall_table.S b/arch/parisc/kernel/syscall_table.S
index 8eefb12d1d33..78c3ef8c348d 100644
--- a/arch/parisc/kernel/syscall_table.S
+++ b/arch/parisc/kernel/syscall_table.S
@@ -438,6 +438,8 @@
ENTRY_SAME(memfd_create) /* 340 */
ENTRY_SAME(bpf)
ENTRY_COMP(execveat)
+ ENTRY_SAME(membarrier)
+ ENTRY_SAME(userfaultfd)
.ifne (. - 90b) - (__NR_Linux_syscalls * (91b - 90b))