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[XFS] reducing the number of random number functions.

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Patch provided by Joe Perches

SGI-PV: 961696
SGI-Modid: xfs-linux-melb:xfs-kern:28209a

Signed-off-by: Joe Perches <joe@perches.com>
Signed-off-by: Lachlan McIlroy <lachlan@sgi.com>
Signed-off-by: Tim Shimmin <tes@sgi.com>
This commit is contained in:
Joe Perches 2007-05-08 13:49:03 +10:00 committed by Tim Shimmin
parent e9ed9d2240
commit e7a23a9b37
4 changed files with 3 additions and 20 deletions
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17
fs/xfs/support/debug.c
View File

@ -81,20 +81,3 @@ assfail(char *expr, char *file, int line)
printk("Assertion failed: %s, file: %s, line: %d\n", expr, file, line);
BUG();
}
#if ((defined(DEBUG) || defined(INDUCE_IO_ERRROR)) && !defined(NO_WANT_RANDOM))
unsigned long random(void)
{
static unsigned long RandomValue = 1;
/* cycles pseudo-randomly through all values between 1 and 2^31 - 2 */
register long rv = RandomValue;
register long lo;
register long hi;
hi = rv / 127773;
lo = rv % 127773;
rv = 16807 * lo - 2836 * hi;
if (rv <= 0) rv += 2147483647;
return RandomValue = rv;
}
#endif /* DEBUG || INDUCE_IO_ERRROR || !NO_WANT_RANDOM */

2
fs/xfs/support/debug.h
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@ -50,7 +50,7 @@ extern void assfail(char *expr, char *f, int l);
#else /* DEBUG */
# define ASSERT(expr) ASSERT_ALWAYS(expr)
extern unsigned long random(void);
# include <linux/random.h>
#ifndef STATIC
# define STATIC noinline

2
fs/xfs/xfs_alloc.c
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@ -764,7 +764,7 @@ xfs_alloc_ag_vextent_near(
*/
int dofirst; /* set to do first algorithm */
dofirst = random() & 1;
dofirst = random32() & 1;
#endif
/*
* Get a cursor for the by-size btree.

2
fs/xfs/xfs_error.c
View File

@ -80,7 +80,7 @@ xfs_error_test(int error_tag, int *fsidp, char *expression,
int i;
int64_t fsid;
if (random() % randfactor)
if (random32() % randfactor)
return 0;
memcpy(&fsid, fsidp, sizeof(xfs_fsid_t));