GitHub-Mirror/Star64_linux
2
0
Fork 0
mirror of https://github.com/Fishwaldo/Star64_linux.git synced 2025-06-29 01:51:39 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

lockref: use BLOATED_SPINLOCKS to avoid explicit config dependencies

Browse source 
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>
This commit is contained in:
Peter Zijlstra 2013-11-14 14:31:54 -08:00 • committed by Linus Torvalds
parent ea1e7ed337
commit 57f4257eae
3 changed files with 7 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

7
include/linux/lockref.h
View file

@ -15,10 +15,15 @@
*/
#include <linux/spinlock.h>
#include <generated/bounds.h>
#define USE_CMPXCHG_LOCKREF \
(IS_ENABLED(CONFIG_ARCH_USE_CMPXCHG_LOCKREF) && \
IS_ENABLED(CONFIG_SMP) && !BLOATED_SPINLOCKS)
struct lockref {
union {
#ifdef CONFIG_CMPXCHG_LOCKREF
#if USE_CMPXCHG_LOCKREF
aligned_u64 lock_count;
#endif
struct {