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authorLatchesar Ionkov <lucho@ionkov.net>2006-01-08 01:05:00 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-01-08 20:14:06 -0800
commit531b1094b74365dcc55fa464d28a9a2497ae825d (patch)
treea0384dabe3be1c844166d028b3ef7c21c3dfe5fc /fs/9p/error.c
parentd8da097afb765654c866062148fd98b11db9003e (diff)
downloadop-kernel-dev-531b1094b74365dcc55fa464d28a9a2497ae825d.zip
op-kernel-dev-531b1094b74365dcc55fa464d28a9a2497ae825d.tar.gz
[PATCH] v9fs: zero copy implementation
Performance enhancement reducing the number of copies in the data and stat paths. Signed-off-by: Latchesar Ionkov <lucho@ionkov.net> Cc: Eric Van Hensbergen <ericvh@ericvh.myip.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/9p/error.c')
-rw-r--r--fs/9p/error.c10
1 files changed, 5 insertions, 5 deletions
diff --git a/fs/9p/error.c b/fs/9p/error.c
index 834cb17..e4b6f8f 100644
--- a/fs/9p/error.c
+++ b/fs/9p/error.c
@@ -33,7 +33,6 @@
#include <linux/list.h>
#include <linux/jhash.h>
-#include <linux/string.h>
#include "debug.h"
#include "error.h"
@@ -55,7 +54,8 @@ int v9fs_error_init(void)
/* load initial error map into hash table */
for (c = errmap; c->name != NULL; c++) {
- bucket = jhash(c->name, strlen(c->name), 0) % ERRHASHSZ;
+ c->namelen = strlen(c->name);
+ bucket = jhash(c->name, c->namelen, 0) % ERRHASHSZ;
INIT_HLIST_NODE(&c->list);
hlist_add_head(&c->list, &hash_errmap[bucket]);
}
@@ -69,15 +69,15 @@ int v9fs_error_init(void)
*
*/
-int v9fs_errstr2errno(char *errstr)
+int v9fs_errstr2errno(char *errstr, int len)
{
int errno = 0;
struct hlist_node *p = NULL;
struct errormap *c = NULL;
- int bucket = jhash(errstr, strlen(errstr), 0) % ERRHASHSZ;
+ int bucket = jhash(errstr, len, 0) % ERRHASHSZ;
hlist_for_each_entry(c, p, &hash_errmap[bucket], list) {
- if (!strcmp(c->name, errstr)) {
+ if (c->namelen==len && !memcmp(c->name, errstr, len)) {
errno = c->val;
break;
}
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