提交 b680f097 编写于 作者: T Tony Luck

[IA64] Fix rwsem: RWSEM_WAITING_BIAS must not be unsigned.

Some nice improvements were made to rwsem in commit:

 424acaae
 rwsem: wake queued readers when writer blocks on active read lock

but this change overlooked that ia64 had defined RWSEM_WAITING_BIAS
as an unsigned value, while the new code required a signed value (as
it is in every other architecture).

This fix suggested by the original patch author: Michel Lespinasse.
Signed-off-by: NTony Luck <tony.luck@intel.com>
上级 5af568cb
...@@ -40,9 +40,9 @@ struct rw_semaphore { ...@@ -40,9 +40,9 @@ struct rw_semaphore {
}; };
#define RWSEM_UNLOCKED_VALUE __IA64_UL_CONST(0x0000000000000000) #define RWSEM_UNLOCKED_VALUE __IA64_UL_CONST(0x0000000000000000)
#define RWSEM_ACTIVE_BIAS __IA64_UL_CONST(0x0000000000000001) #define RWSEM_ACTIVE_BIAS (1L)
#define RWSEM_ACTIVE_MASK __IA64_UL_CONST(0x00000000ffffffff) #define RWSEM_ACTIVE_MASK (0xffffffffL)
#define RWSEM_WAITING_BIAS -__IA64_UL_CONST(0x0000000100000000) #define RWSEM_WAITING_BIAS (-0x100000000L)
#define RWSEM_ACTIVE_READ_BIAS RWSEM_ACTIVE_BIAS #define RWSEM_ACTIVE_READ_BIAS RWSEM_ACTIVE_BIAS
#define RWSEM_ACTIVE_WRITE_BIAS (RWSEM_WAITING_BIAS + RWSEM_ACTIVE_BIAS) #define RWSEM_ACTIVE_WRITE_BIAS (RWSEM_WAITING_BIAS + RWSEM_ACTIVE_BIAS)
......
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