[PATCH] read_can_lock and write_can_lock for MIPS

[PATCH] read_can_lock and write_can_lock for MIPS

[Manish Lachwani]

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Hi Ralf,

With SMP+PREEMPT, read_can_lock() and write_can_lock() need to be defined. Attached
patch does this. Please review.

Thanks
Manish Lachwani

[-- Attachment #2: common_mips_locks_preempt.patch --]
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Index: linux/include/asm-mips/spinlock.h
===================================================================
--- linux.orig/include/asm-mips/spinlock.h
+++ linux/include/asm-mips/spinlock.h
@@ -140,6 +140,9 @@
 
 #define rwlock_init(x)  do { *(x) = RW_LOCK_UNLOCKED; } while(0)
 
+#define read_can_lock(rw)	((rw)->lock >= 0)
+#define write_can_lock(rw)	(!(rw)->lock)
+
 static inline void _raw_read_lock(rwlock_t *rw)
 {
 	unsigned int tmp;

Re: [PATCH] read_can_lock and write_can_lock for MIPS

[Ralf Baechle]

On Tue, Feb 01, 2005 at 01:26:03PM -0800, Manish Lachwani wrote:

> Hi Ralf,
> 
> With SMP+PREEMPT, read_can_lock() and write_can_lock() need to be defined. Attached
> patch does this. Please review.

Thanks, applied.  In addition I copied the comments from the i386 code
into the spinlocks.h.

  Ralf