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kern: Factor out function to convert hash flags to malloc(9) flags

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Suggested by:	jhb
Reviewed by:	jhb, kib
Sponsored by:	Microsoft OSTC
Differential Revision:	https://reviews.freebsd.org/D6184
This commit is contained in:
Sepherosa Ziehau 2016-05-04 03:07:52 +00:00
parent d191ae19a2
commit d5f0ea7ca2
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=299040
1 changed files with 12 additions and 10 deletions
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22
sys/kern/subr_hash.c
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@ -41,6 +41,13 @@ __FBSDID("$FreeBSD$");
#include <sys/systm.h>
#include <sys/malloc.h>
static __inline int
hash_mflags(int flags)
{
return ((flags & HASH_NOWAIT) ? M_NOWAIT : M_WAITOK);
}
/*
* General routine to allocate a hash table with control of memory flags.
*/
@ -61,13 +68,8 @@ hashinit_flags(int elements, struct malloc_type *type, u_long *hashmask,
continue;
hashsize >>= 1;
if (flags & HASH_NOWAIT)
hashtbl = malloc((u_long)hashsize * sizeof(*hashtbl),
type, M_NOWAIT);
else
hashtbl = malloc((u_long)hashsize * sizeof(*hashtbl),
type, M_WAITOK);
hashtbl = malloc((u_long)hashsize * sizeof(*hashtbl), type,
hash_mflags(flags));
if (hashtbl != NULL) {
for (i = 0; i < hashsize; i++)
LIST_INIT(&hashtbl[i]);
@ -112,7 +114,7 @@ phashinit_flags(int elements, struct malloc_type *type, u_long *nentries, int fl
{
long hashsize;
LIST_HEAD(generic, generic) *hashtbl;
int i, m_flags;
int i;
KASSERT(elements > 0, ("%s: bad elements", __func__));
/* Exactly one of HASH_WAITOK and HASH_NOWAIT must be set. */
@ -127,8 +129,8 @@ phashinit_flags(int elements, struct malloc_type *type, u_long *nentries, int fl
}
hashsize = primes[i - 1];
m_flags = (flags & HASH_NOWAIT) ? M_NOWAIT : M_WAITOK;
hashtbl = malloc((u_long)hashsize * sizeof(*hashtbl), type, m_flags);
hashtbl = malloc((u_long)hashsize * sizeof(*hashtbl), type,
hash_mflags(flags));
if (hashtbl == NULL)
return (NULL);