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authorPeter Zijlstra <peterz@infradead.org>2013-11-14 14:31:52 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2013-11-15 09:32:20 +0900
commit539edb5846c740d78a8b6c2e43a99ca4323df68f (patch)
treedd03e1a7149f101f42311eac41e2857816cce36c /kernel/bounds.c
parent49076ec2ccaf68610aa03d96bced9a6694b93ca1 (diff)
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.c2
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 */
}