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| author | Peter Zijlstra <peterz@infradead.org> | 2013-11-14 14:31:54 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-15 09:32:20 +0900 |
| commit | 57f4257eae33e036125973858934730250d464e3 (patch) | |
| tree | f8011cdf5b2e77abb4c721221793d40ed24985a7 /lib | |
| parent | ea1e7ed33708c7a760419ff9ded0a6cb90586a50 (diff) | |
| download | lwn-57f4257eae33e036125973858934730250d464e3.tar.gz lwn-57f4257eae33e036125973858934730250d464e3.zip | |
lockref: use BLOATED_SPINLOCKS to avoid explicit config dependencies
Avoid the fragile Kconfig construct guestimating spinlock_t sizes; use a
friendly compile-time test to determine this.
[kirill.shutemov@linux.intel.com: drop CONFIG_CMPXCHG_LOCKREF]
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 'lib')
| -rw-r--r-- | lib/Kconfig | 7 | ||||
| -rw-r--r-- | lib/lockref.c | 2 |
2 files changed, 1 insertions, 8 deletions
diff --git a/lib/Kconfig b/lib/Kconfig index 75485e163ca3..06dc74200a51 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -51,13 +51,6 @@ config PERCPU_RWSEM config ARCH_USE_CMPXCHG_LOCKREF bool -config CMPXCHG_LOCKREF - def_bool y if ARCH_USE_CMPXCHG_LOCKREF - depends on SMP - depends on !GENERIC_LOCKBREAK - depends on !DEBUG_SPINLOCK - depends on !DEBUG_LOCK_ALLOC - config CRC_CCITT tristate "CRC-CCITT functions" help diff --git a/lib/lockref.c b/lib/lockref.c index af6e95d0bed6..d2b123f8456b 100644 --- a/lib/lockref.c +++ b/lib/lockref.c @@ -1,7 +1,7 @@ #include <linux/export.h> #include <linux/lockref.h> -#ifdef CONFIG_CMPXCHG_LOCKREF +#if USE_CMPXCHG_LOCKREF /* * Allow weakly-ordered memory architectures to provide barrier-less |