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authorPeter Zijlstra <peterz@infradead.org>2020-02-19 20:25:09 +0300
committerThomas Gleixner <tglx@linutronix.de>2020-06-11 16:14:53 +0300
commitdf65bba1dcd8ffadd922a71196b78c6d7630c33b (patch)
tree4e63ec64b11079ba25d827122b7e25b97423a3b1 /lib/bsearch.c
parentef882bfef933408360e4d9d0c2c83a1e2fc996f3 (diff)
downloadlinux-df65bba1dcd8ffadd922a71196b78c6d7630c33b.tar.xz
lib/bsearch: Provide __always_inline variant
For code that needs the ultimate performance (it can inline the @cmp function too) or simply needs to avoid calling external functions for whatever reason, provide an __always_inline variant of bsearch(). [ tglx: Renamed to __inline_bsearch() as suggested by Andy ] Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com> Acked-by: Andy Lutomirski <luto@kernel.org> Link: https://lkml.kernel.org/r/20200505135313.624443814@linutronix.de
Diffstat (limited to 'lib/bsearch.c')
-rw-r--r--lib/bsearch.c22
1 files changed, 2 insertions, 20 deletions
diff --git a/lib/bsearch.c b/lib/bsearch.c
index 8b3aae5ae77a..bf86aa66f2b2 100644
--- a/lib/bsearch.c
+++ b/lib/bsearch.c
@@ -28,27 +28,9 @@
* the key and elements in the array are of the same type, you can use
* the same comparison function for both sort() and bsearch().
*/
-void *bsearch(const void *key, const void *base, size_t num, size_t size,
- cmp_func_t cmp)
+void *bsearch(const void *key, const void *base, size_t num, size_t size, cmp_func_t cmp)
{
- const char *pivot;
- int result;
-
- while (num > 0) {
- pivot = base + (num >> 1) * size;
- result = cmp(key, pivot);
-
- if (result == 0)
- return (void *)pivot;
-
- if (result > 0) {
- base = pivot + size;
- num--;
- }
- num >>= 1;
- }
-
- return NULL;
+ return __inline_bsearch(key, base, num, size, cmp);
}
EXPORT_SYMBOL(bsearch);
NOKPROBE_SYMBOL(bsearch);