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authorHeiko Carstens <heiko.carstens@de.ibm.com>2009-08-31 14:43:38 +0200
committerIngo Molnar <mingo@elte.hu>2009-08-31 18:08:51 +0200
commitbb7bed082500179519c7caf0678ba3bed9752658 (patch)
tree59daa305235ec13b70f3f10a8f407df0e8516c62 /include/linux/spinlock_api_smp.h
parent892a7c67c12da63fa4b51728bbe5b982356a090a (diff)
downloadop-kernel-dev-bb7bed082500179519c7caf0678ba3bed9752658.zip
op-kernel-dev-bb7bed082500179519c7caf0678ba3bed9752658.tar.gz
locking: Simplify spinlock inlining
For !DEBUG_SPINLOCK && !PREEMPT && SMP the spin_unlock() functions were always inlined by using special defines which would call the __raw* functions. The out-of-line variants for these functions would be generated anyway. Use the new per unlock/locking variant mechanism to force inlining of the unlock functions like before. This is not a functional change, we just get rid of one additional way to force inlining. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Horst Hartmann <horsth@linux.vnet.ibm.com> Cc: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> Cc: Andrew Morton <akpm@linux-foundation.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: David Miller <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: <linux-arch@vger.kernel.org> LKML-Reference: <20090831124418.848735034@de.ibm.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'include/linux/spinlock_api_smp.h')
-rw-r--r--include/linux/spinlock_api_smp.h12
1 files changed, 12 insertions, 0 deletions
diff --git a/include/linux/spinlock_api_smp.h b/include/linux/spinlock_api_smp.h
index 1a411e3..7a7e18f 100644
--- a/include/linux/spinlock_api_smp.h
+++ b/include/linux/spinlock_api_smp.h
@@ -60,6 +60,18 @@ void __lockfunc _read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
void __lockfunc _write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
__releases(lock);
+/*
+ * We inline the unlock functions in the nondebug case:
+ */
+#if !defined(CONFIG_DEBUG_SPINLOCK) && !defined(CONFIG_PREEMPT)
+#define __always_inline__spin_unlock
+#define __always_inline__read_unlock
+#define __always_inline__write_unlock
+#define __always_inline__spin_unlock_irq
+#define __always_inline__read_unlock_irq
+#define __always_inline__write_unlock_irq
+#endif
+
#ifndef CONFIG_DEBUG_SPINLOCK
#ifndef CONFIG_GENERIC_LOCKBREAK
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