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| author | Peter Zijlstra <peterz@infradead.org> | 2013-11-14 14:31:52 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-15 09:32:20 +0900 |
| commit | 539edb5846c740d78a8b6c2e43a99ca4323df68f (patch) | |
| tree | dd03e1a7149f101f42311eac41e2857816cce36c /kernel/bounds.c | |
| parent | 49076ec2ccaf68610aa03d96bced9a6694b93ca1 (diff) | |
| download | lwn-539edb5846c740d78a8b6c2e43a99ca4323df68f.tar.gz lwn-539edb5846c740d78a8b6c2e43a99ca4323df68f.zip | |
mm: properly separate the bloated ptl from the regular case
Use kernel/bounds.c to convert build-time spinlock_t size check into a
preprocessor symbol and apply that to properly separate the page::ptl
situation.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/bounds.c')
| -rw-r--r-- | kernel/bounds.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/kernel/bounds.c b/kernel/bounds.c index e8ca97b5c386..578782ef6ae1 100644 --- a/kernel/bounds.c +++ b/kernel/bounds.c @@ -11,6 +11,7 @@ #include <linux/kbuild.h> #include <linux/page_cgroup.h> #include <linux/log2.h> +#include <linux/spinlock.h> void foo(void) { @@ -21,5 +22,6 @@ void foo(void) #ifdef CONFIG_SMP DEFINE(NR_CPUS_BITS, ilog2(CONFIG_NR_CPUS)); #endif + DEFINE(BLOATED_SPINLOCKS, sizeof(spinlock_t) > sizeof(int)); /* End of constants */ } |