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authorVivek Goyal <vgoyal@redhat.com>2014-08-08 14:25:52 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2014-08-08 15:57:32 -0700
commit815d5704a337a662bf960757edbff7a0680d40fd (patch)
tree54d34d4c4e345e1cfe583c81e3ad4fb585006779 /kernel
parent8c86e70acead629aacb4afcd818add66bf6844d9 (diff)
downloadlinux-815d5704a337a662bf960757edbff7a0680d40fd.tar.gz
kexec: make kexec_segment user buffer pointer a union
So far kexec_segment->buf was always a user space pointer as user space passed the array of kexec_segment structures and kernel copied it. But with new system call, list of kexec segments will be prepared by kernel and kexec_segment->buf will point to a kernel memory. So while I was adding code where I made assumption that ->buf is pointing to kernel memory, sparse started giving warning. Make ->buf a union. And where a user space pointer is expected, access it using ->buf and where a kernel space pointer is expected, access it using ->kbuf. That takes care of sparse warnings. Signed-off-by: Vivek Goyal <vgoyal@redhat.com> Cc: Borislav Petkov <bp@suse.de> Cc: Michael Kerrisk <mtk.manpages@gmail.com> Cc: Yinghai Lu <yinghai@kernel.org> Cc: Eric Biederman <ebiederm@xmission.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Matthew Garrett <mjg59@srcf.ucam.org> Cc: Greg Kroah-Hartman <greg@kroah.com> Cc: Dave Young <dyoung@redhat.com> Cc: WANG Chao <chaowang@redhat.com> Cc: Baoquan He <bhe@redhat.com> Cc: Andy Lutomirski <luto@amacapital.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel')
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