[XFS] reducing the number of random number functions.

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>

4 files changed, 3 insertions, 20 deletions

diff --git a/fs/xfs/support/debug.c b/fs/xfs/support/debug.c
index 08bbd3cb87ae..f45a49ffd3a3 100644
--- a/fs/xfs/support/debug.c
+++ b/fs/xfs/support/debug.c
@@ -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 */
diff --git a/fs/xfs/support/debug.h b/fs/xfs/support/debug.h
index 2a70cc605ae3..a27a7c8c0526 100644
--- a/fs/xfs/support/debug.h
+++ b/fs/xfs/support/debug.h
@@ -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
diff --git a/fs/xfs/xfs_alloc.c b/fs/xfs/xfs_alloc.c
index e80dda3437d1..8e9a40aa0cd3 100644
--- a/fs/xfs/xfs_alloc.c
+++ b/fs/xfs/xfs_alloc.c
@@ -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.
diff --git a/fs/xfs/xfs_error.c b/fs/xfs/xfs_error.c
index b1af54464f00..8c4331631337 100644
--- a/fs/xfs/xfs_error.c
+++ b/fs/xfs/xfs_error.c
@@ -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));