Make NOPed versions of __raw_read_lock and family available
under uniprocessor kernels.
Discovered when compiling a uniprocessor kernel with the
fusyn patch applied.
The standard kernel does not use __raw_read_lock etc
outside of spinlock.c, which may account for this bug
being undiscovered until now.
2.6.16-rc1-git4-jak/include/linux/spinlock_up.h | 20 ++++++++++----------
1 files changed, 10 insertions(+), 10 deletions(-)
diff -puNa include/linux/spinlock_up.h~define.__raw_read_lock.and.family.for.uniproc-nodebug.combo include/linux/spinlock_up.h
--- 2.6.16-rc1-git4/include/linux/spinlock_up.h~define.__raw_read_lock.and.family.for.uniproc-nodebug.combo 2006-01-24 12:57:15.000000000 -0500
+++ 2.6.16-rc1-git4-jak/include/linux/spinlock_up.h 2006-01-24 12:58:51.000000000 -0500
@@ -47,16 +47,6 @@ static inline void __raw_spin_unlock(raw
lock->slock = 1;
}
-/*
- * Read-write spinlocks. No debug version.
- */
-#define __raw_read_lock(lock) do { (void)(lock); } while (0)
-#define __raw_write_lock(lock) do { (void)(lock); } while (0)
-#define __raw_read_trylock(lock) ({ (void)(lock); 1; })
-#define __raw_write_trylock(lock) ({ (void)(lock); 1; })
-#define __raw_read_unlock(lock) do { (void)(lock); } while (0)
-#define __raw_write_unlock(lock) do { (void)(lock); } while (0)
-
#else /* DEBUG_SPINLOCK */
#define __raw_spin_is_locked(lock) ((void)(lock), 0)
/* for sched.c and kernel_lock.c: */
@@ -71,4 +61,14 @@ static inline void __raw_spin_unlock(raw
#define __raw_spin_unlock_wait(lock) \
do { cpu_relax(); } while (__raw_spin_is_locked(lock))
+/*
+ * Read-write spinlocks. Only non-debug versions available.
+ */
+#define __raw_read_lock(lock) do { (void)(lock); } while (0)
+#define __raw_write_lock(lock) do { (void)(lock); } while (0)
+#define __raw_read_trylock(lock) ({ (void)(lock); 1; })
+#define __raw_write_trylock(lock) ({ (void)(lock); 1; })
+#define __raw_read_unlock(lock) do { (void)(lock); } while (0)
+#define __raw_write_unlock(lock) do { (void)(lock); } while (0)
+
#endif /* __LINUX_SPINLOCK_UP_H */
_
-
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