The patch titled
spin_lock_irq: Enable interrupts while spinning: i386 implementation
has been added to the -mm tree. Its filename is
spin_lock_irq-enable-interrupts-while-spinning-i386-implementation.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: spin_lock_irq: Enable interrupts while spinning: i386 implementation
From: Ravikiran G Thirumalai <kiran@xxxxxxxxxxxx>
Right now we have on mainline (non PREEMPT case);
i386 x86_64
-----------------------------------------------------------------------------
spin_lock_irq cli when spin cli when spin
spin_lock_irqsave spin with intr enabled spin with intr enabled
The posted patchset changed this to:
i386 x86_64
-----------------------------------------------------------------------------
spin_lock_irq cli when spin spin with intr enabled
spin_lock_irqsave spin with intr enabled spin with intr enabled
Here goes the i386 part as well for spin_lock_irq.
Signed-off-by: Ravikiran Thirumalai <kiran@xxxxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Cc: Michael Davidson <md@xxxxxxxxxx>
Cc: Pravin B. Shelar <pravin.shelar@xxxxxxxxxxxxxx>
Cc: Shai Fultheim <shai@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
include/asm-i386/spinlock.h | 17 ++++++++++++++++-
1 files changed, 16 insertions(+), 1 deletion(-)
diff -puN include/asm-i386/spinlock.h~spin_lock_irq-enable-interrupts-while-spinning-i386-implementation include/asm-i386/spinlock.h
--- a/include/asm-i386/spinlock.h~spin_lock_irq-enable-interrupts-while-spinning-i386-implementation
+++ a/include/asm-i386/spinlock.h
@@ -82,7 +82,22 @@ static inline void __raw_spin_lock_flags
CLI_STI_INPUT_ARGS
: "memory" CLI_STI_CLOBBERS);
}
-# define __raw_spin_lock_irq(lock) __raw_spin_lock(lock)
+
+static inline void __raw_spin_lock_irq(raw_spinlock_t *lock)
+{
+ asm volatile("\n1:\t"
+ LOCK_PREFIX " ; decb %0\n\t"
+ "jns 3f\n"
+ STI_STRING "\n"
+ "2:\t"
+ "rep;nop\n\t"
+ "cmpb $0,%0\n\t"
+ "jle 2b\n\t"
+ CLI_STRING "\n"
+ "jmp 1b\n"
+ "3:\n\t"
+ : "+m" (lock->slock) : : "memory");
+}
#endif
static inline int __raw_spin_trylock(raw_spinlock_t *lock)
_
Patches currently in -mm which might be from kiran@xxxxxxxxxxxx are
x86-fix-dev_to_node-for-x86-and-x86_64.patch
mm-set-hashdist_default-to-1-for-x86_64-numa.patch
spin_lock_irq-enable-interrupts-while-spinning-preparatory-patch.patch
spin_lock_irq-enable-interrupts-while-spinning-x86_64-implementation.patch
spin_lock_irq-enable-interrupts-while-spinning-i386-implementation.patch
slab-leaks3-default-y.patch
-
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