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9p: Use hashtable.h for hash_errmap

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Convert hash_errmap in error.c to use the generic hashtable
implementation from hashtable.h instead of the manual hlist_head array
implementation.

This simplifies the code and makes it more maintainable by using the
standard hashtable API and removes the need for manual hash table
management.

Signed-off-by: Sasha Levin <sashal@kernel.org>
Message-ID: <20250320145200.3124863-1-sashal@kernel.org>
Signed-off-by: Dominique Martinet <asmadeus@codewreck.org>
This commit is contained in:
Sasha Levin 2025-03-20 10:52:00 -04:00 • committed by Dominique Martinet
parent 34ceb69edd
commit ad2e2a77dc
1 changed files with 9 additions and 12 deletions
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21
net/9p/error.c
View file

@ -16,6 +16,7 @@
#include <linux/list.h>
#include <linux/jhash.h>
#include <linux/errno.h>
#include <linux/hashtable.h>
#include <net/9p/9p.h>
/**
@ -33,8 +34,8 @@ struct errormap {
struct hlist_node list;
};
#define ERRHASHSZ 32
static struct hlist_head hash_errmap[ERRHASHSZ];
#define ERRHASH_BITS 5
static DEFINE_HASHTABLE(hash_errmap, ERRHASH_BITS);
/* FixMe - reduce to a reasonable size */
static struct errormap errmap[] = {
@ -176,18 +177,14 @@ static struct errormap errmap[] = {
int p9_error_init(void)
{
struct errormap *c;
int bucket;
/* initialize hash table */
for (bucket = 0; bucket < ERRHASHSZ; bucket++)
INIT_HLIST_HEAD(&hash_errmap[bucket]);
u32 hash;
/* load initial error map into hash table */
for (c = errmap; c->name; c++) {
c->namelen = strlen(c->name);
bucket = jhash(c->name, c->namelen, 0) % ERRHASHSZ;
hash = jhash(c->name, c->namelen, 0);
INIT_HLIST_NODE(&c->list);
hlist_add_head(&c->list, &hash_errmap[bucket]);
hash_add(hash_errmap, &c->list, hash);
}
return 1;
@ -205,12 +202,12 @@ int p9_errstr2errno(char *errstr, int len)
{
int errno;
struct errormap *c;
int bucket;
u32 hash;
errno = 0;
c = NULL;
bucket = jhash(errstr, len, 0) % ERRHASHSZ;
hlist_for_each_entry(c, &hash_errmap[bucket], list) {
hash = jhash(errstr, len, 0);
hash_for_each_possible(hash_errmap, c, list, hash) {
if (c->namelen == len && !memcmp(c->name, errstr, len)) {
errno = c->val;
break;