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authorNick Piggin <npiggin@suse.de>2008-07-25 19:45:32 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-26 12:00:06 -0700
commit19fd6231279be3c3bdd02ed99f9b0eb195978064 (patch)
treeee09121054262d73c551b57114acd855b82a7a82 /include/asm-arm/cacheflush.h
parentmm: lockless pagecache (diff)
downloadlinux-dev-19fd6231279be3c3bdd02ed99f9b0eb195978064.tar.xz
linux-dev-19fd6231279be3c3bdd02ed99f9b0eb195978064.zip
mm: spinlock tree_lock
mapping->tree_lock has no read lockers. convert the lock from an rwlock to a spinlock. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Hugh Dickins <hugh@veritas.com> Cc: "Paul E. McKenney" <paulmck@us.ibm.com> Reviewed-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
-rw-r--r--include/asm-arm/cacheflush.h4
1 files changed, 2 insertions, 2 deletions
diff --git a/include/asm-arm/cacheflush.h b/include/asm-arm/cacheflush.h
index 70b0fe724b62..03cf1ee977b7 100644
--- a/include/asm-arm/cacheflush.h
+++ b/include/asm-arm/cacheflush.h
@@ -424,9 +424,9 @@ static inline void flush_anon_page(struct vm_area_struct *vma,
}
#define flush_dcache_mmap_lock(mapping) \
- write_lock_irq(&(mapping)->tree_lock)
+ spin_lock_irq(&(mapping)->tree_lock)
#define flush_dcache_mmap_unlock(mapping) \
- write_unlock_irq(&(mapping)->tree_lock)
+ spin_unlock_irq(&(mapping)->tree_lock)
#define flush_icache_user_range(vma,page,addr,len) \
flush_dcache_page(page)