Keith Owens wrote:
>
> ...
> @@ -47,7 +47,7 @@ static inline void __unhash_process(stru
> spin_unlock(&dcache_lock);
> }
> write_unlock_irq(&tasklist_lock);
> - if (unlikely(proc_dentry)) {
> + if (unlikely(proc_dentry != NULL)) {
> shrink_dcache_parent(proc_dentry);
> dput(proc_dentry);
> }
Is it not possible to fix it for all time?
--- linux-2.5.9/include/linux/compiler.h Sun Apr 14 15:45:08 2002
+++ 25/include/linux/compiler.h Tue Apr 23 11:27:37 2002
@@ -10,8 +10,8 @@
#define __builtin_expect(x, expected_value) (x)
#endif
-#define likely(x) __builtin_expect((x),1)
-#define unlikely(x) __builtin_expect((x),0)
+#define likely(x) __builtin_expect((x) != 0, 1)
+#define unlikely(x) __builtin_expect((x) != 0, 0)
/* This macro obfuscates arithmetic on a variable address so that gcc
shouldn't recognize the original var, and make assumptions about it */
(Interestingly, this patch shrinks my kernel by 32 bytes. hmm.)
BTW, it would be very useful if someone could invert the sense of
`likely' and `unlikely', so they always say the *wrong* thing, and
then actually demonstrate some real-world slowdown. coz if this
can't be done, why are we putting up with the visual clutter?
-
-
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This archive was generated by hypermail 2b29 : Tue Apr 23 2002 - 22:00:36 EST