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authorVegard Nossum <vegard.nossum@oracle.com>2017-02-27 23:30:07 +0100
committerLinus Torvalds <torvalds@linux-foundation.org>2017-02-28 03:43:48 +0100
commitf1f1007644ffc8051a4c11427d58b1967ae7b75a (patch)
treee7e590cb1baa494b963d81b967a3f98d3c56f33e /arch/sh/kernel/smp.c
parentcheckpatch: warn when formats use %Z and suggest %z (diff)
downloadlinux-f1f1007644ffc8051a4c11427d58b1967ae7b75a.tar.xz
linux-f1f1007644ffc8051a4c11427d58b1967ae7b75a.zip
mm: add new mmgrab() helper
Apart from adding the helper function itself, the rest of the kernel is converted mechanically using: git grep -l 'atomic_inc.*mm_count' | xargs sed -i 's/atomic_inc(&\(.*\)->mm_count);/mmgrab\(\1\);/' git grep -l 'atomic_inc.*mm_count' | xargs sed -i 's/atomic_inc(&\(.*\)\.mm_count);/mmgrab\(\&\1\);/' This is needed for a later patch that hooks into the helper, but might be a worthwhile cleanup on its own. (Michal Hocko provided most of the kerneldoc comment.) Link: http://lkml.kernel.org/r/20161218123229.22952-1-vegard.nossum@oracle.com Signed-off-by: Vegard Nossum <vegard.nossum@oracle.com> Acked-by: Michal Hocko <mhocko@suse.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Acked-by: David Rientjes <rientjes@google.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/sh/kernel/smp.c')
-rw-r--r--arch/sh/kernel/smp.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/sh/kernel/smp.c b/arch/sh/kernel/smp.c
index 38e7860845db..ee379c699c08 100644
--- a/arch/sh/kernel/smp.c
+++ b/arch/sh/kernel/smp.c
@@ -178,7 +178,7 @@ asmlinkage void start_secondary(void)
struct mm_struct *mm = &init_mm;
enable_mmu();
- atomic_inc(&mm->mm_count);
+ mmgrab(mm);
atomic_inc(&mm->mm_users);
current->active_mm = mm;
#ifdef CONFIG_MMU