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author | Heiko Carstens <heiko.carstens@de.ibm.com> | 2009-08-31 14:43:37 +0200 |
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committer | Ingo Molnar <mingo@elte.hu> | 2009-08-31 18:08:50 +0200 |
commit | 892a7c67c12da63fa4b51728bbe5b982356a090a (patch) | |
tree | ba6cb9cf1be394428d9ef2596b0575e28ab0b19a /kernel/spinlock.c | |
parent | 69d0ee7377eef808e34ba5542b554ec97244b871 (diff) | |
download | lwn-892a7c67c12da63fa4b51728bbe5b982356a090a.tar.gz lwn-892a7c67c12da63fa4b51728bbe5b982356a090a.zip |
locking: Allow arch-inlined spinlocks
This allows an architecture to specify per lock variant if the
locking code should be kept out-of-line or inlined.
If an architecure wants out-of-line locking code no change is
needed. To force inlining of e.g. spin_lock() the line:
#define __always_inline__spin_lock
needs to be added to arch/<...>/include/asm/spinlock.h
If CONFIG_DEBUG_SPINLOCK or CONFIG_GENERIC_LOCKBREAK are
defined the per architecture defines are (partly) ignored and
still out-of-line spinlock code will be generated.
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: <20090831124418.375299024@de.ibm.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'kernel/spinlock.c')
-rw-r--r-- | kernel/spinlock.c | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/kernel/spinlock.c b/kernel/spinlock.c index 2c000f5c070b..5ddab730cb2f 100644 --- a/kernel/spinlock.c +++ b/kernel/spinlock.c @@ -21,23 +21,29 @@ #include <linux/debug_locks.h> #include <linux/module.h> +#ifndef _spin_trylock int __lockfunc _spin_trylock(spinlock_t *lock) { return __spin_trylock(lock); } EXPORT_SYMBOL(_spin_trylock); +#endif +#ifndef _read_trylock int __lockfunc _read_trylock(rwlock_t *lock) { return __read_trylock(lock); } EXPORT_SYMBOL(_read_trylock); +#endif +#ifndef _write_trylock int __lockfunc _write_trylock(rwlock_t *lock) { return __write_trylock(lock); } EXPORT_SYMBOL(_write_trylock); +#endif /* * If lockdep is enabled then we use the non-preemption spin-ops @@ -46,77 +52,101 @@ EXPORT_SYMBOL(_write_trylock); */ #if !defined(CONFIG_GENERIC_LOCKBREAK) || defined(CONFIG_DEBUG_LOCK_ALLOC) +#ifndef _read_lock void __lockfunc _read_lock(rwlock_t *lock) { __read_lock(lock); } EXPORT_SYMBOL(_read_lock); +#endif +#ifndef _spin_lock_irqsave unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock) { return __spin_lock_irqsave(lock); } EXPORT_SYMBOL(_spin_lock_irqsave); +#endif +#ifndef _spin_lock_irq void __lockfunc _spin_lock_irq(spinlock_t *lock) { __spin_lock_irq(lock); } EXPORT_SYMBOL(_spin_lock_irq); +#endif +#ifndef _spin_lock_bh void __lockfunc _spin_lock_bh(spinlock_t *lock) { __spin_lock_bh(lock); } EXPORT_SYMBOL(_spin_lock_bh); +#endif +#ifndef _read_lock_irqsave unsigned long __lockfunc _read_lock_irqsave(rwlock_t *lock) { return __read_lock_irqsave(lock); } EXPORT_SYMBOL(_read_lock_irqsave); +#endif +#ifndef _read_lock_irq void __lockfunc _read_lock_irq(rwlock_t *lock) { __read_lock_irq(lock); } EXPORT_SYMBOL(_read_lock_irq); +#endif +#ifndef _read_lock_bh void __lockfunc _read_lock_bh(rwlock_t *lock) { __read_lock_bh(lock); } EXPORT_SYMBOL(_read_lock_bh); +#endif +#ifndef _write_lock_irqsave unsigned long __lockfunc _write_lock_irqsave(rwlock_t *lock) { return __write_lock_irqsave(lock); } EXPORT_SYMBOL(_write_lock_irqsave); +#endif +#ifndef _write_lock_irq void __lockfunc _write_lock_irq(rwlock_t *lock) { __write_lock_irq(lock); } EXPORT_SYMBOL(_write_lock_irq); +#endif +#ifndef _write_lock_bh void __lockfunc _write_lock_bh(rwlock_t *lock) { __write_lock_bh(lock); } EXPORT_SYMBOL(_write_lock_bh); +#endif +#ifndef _spin_lock void __lockfunc _spin_lock(spinlock_t *lock) { __spin_lock(lock); } EXPORT_SYMBOL(_spin_lock); +#endif +#ifndef _write_lock void __lockfunc _write_lock(rwlock_t *lock) { __write_lock(lock); } EXPORT_SYMBOL(_write_lock); +#endif #else /* CONFIG_PREEMPT: */ @@ -242,83 +272,109 @@ EXPORT_SYMBOL(_spin_lock_nest_lock); #endif +#ifndef _spin_unlock void __lockfunc _spin_unlock(spinlock_t *lock) { __spin_unlock(lock); } EXPORT_SYMBOL(_spin_unlock); +#endif +#ifndef _write_unlock void __lockfunc _write_unlock(rwlock_t *lock) { __write_unlock(lock); } EXPORT_SYMBOL(_write_unlock); +#endif +#ifndef _read_unlock void __lockfunc _read_unlock(rwlock_t *lock) { __read_unlock(lock); } EXPORT_SYMBOL(_read_unlock); +#endif +#ifndef _spin_unlock_irqrestore void __lockfunc _spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags) { __spin_unlock_irqrestore(lock, flags); } EXPORT_SYMBOL(_spin_unlock_irqrestore); +#endif +#ifndef _spin_unlock_irq void __lockfunc _spin_unlock_irq(spinlock_t *lock) { __spin_unlock_irq(lock); } EXPORT_SYMBOL(_spin_unlock_irq); +#endif +#ifndef _spin_unlock_bh void __lockfunc _spin_unlock_bh(spinlock_t *lock) { __spin_unlock_bh(lock); } EXPORT_SYMBOL(_spin_unlock_bh); +#endif +#ifndef _read_unlock_irqrestore void __lockfunc _read_unlock_irqrestore(rwlock_t *lock, unsigned long flags) { __read_unlock_irqrestore(lock, flags); } EXPORT_SYMBOL(_read_unlock_irqrestore); +#endif +#ifndef _read_unlock_irq void __lockfunc _read_unlock_irq(rwlock_t *lock) { __read_unlock_irq(lock); } EXPORT_SYMBOL(_read_unlock_irq); +#endif +#ifndef _read_unlock_bh void __lockfunc _read_unlock_bh(rwlock_t *lock) { __read_unlock_bh(lock); } EXPORT_SYMBOL(_read_unlock_bh); +#endif +#ifndef _write_unlock_irqrestore void __lockfunc _write_unlock_irqrestore(rwlock_t *lock, unsigned long flags) { __write_unlock_irqrestore(lock, flags); } EXPORT_SYMBOL(_write_unlock_irqrestore); +#endif +#ifndef _write_unlock_irq void __lockfunc _write_unlock_irq(rwlock_t *lock) { __write_unlock_irq(lock); } EXPORT_SYMBOL(_write_unlock_irq); +#endif +#ifndef _write_unlock_bh void __lockfunc _write_unlock_bh(rwlock_t *lock) { __write_unlock_bh(lock); } EXPORT_SYMBOL(_write_unlock_bh); +#endif +#ifndef _spin_trylock_bh int __lockfunc _spin_trylock_bh(spinlock_t *lock) { return __spin_trylock_bh(lock); } EXPORT_SYMBOL(_spin_trylock_bh); +#endif notrace int in_lock_functions(unsigned long addr) { |