UBIFS: rename random32() to prandom_u32()

Use more preferable function name which implies using a pseudo-random
number generator.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>

fs/ubifs/debug.c

@@ -2459,7 +2459,7 @@ error_dump:
 
 static inline int chance(unsigned int n, unsigned int out_of)
 {
-	return !!((random32() % out_of) + 1 <= n);
+	return !!((prandom_u32() % out_of) + 1 <= n);
 
 }
 
@@ -2477,13 +2477,13 @@ static int power_cut_emulated(struct ubifs_info *c, int lnum, int write)
 			if (chance(1, 2)) {
 				d->pc_delay = 1;
 				/* Fail withing 1 minute */
-				delay = random32() % 60000;
+				delay = prandom_u32() % 60000;
 				d->pc_timeout = jiffies;
 				d->pc_timeout += msecs_to_jiffies(delay);
 				ubifs_warn("failing after %lums", delay);
 			} else {
 				d->pc_delay = 2;
-				delay = random32() % 10000;
+				delay = prandom_u32() % 10000;
 				/* Fail within 10000 operations */
 				d->pc_cnt_max = delay;
 				ubifs_warn("failing after %lu calls", delay);
@@ -2563,7 +2563,7 @@ static int corrupt_data(const struct ubifs_info *c, const void *buf,
 	unsigned int from, to, ffs = chance(1, 2);
 	unsigned char *p = (void *)buf;
 
-	from = random32() % (len + 1);
+	from = prandom_u32() % (len + 1);
 	/* Corruption may only span one max. write unit */
 	to = min(len, ALIGN(from, c->max_write_size));
 

fs/ubifs/lpt_commit.c

@@ -2007,28 +2007,28 @@ static int dbg_populate_lsave(struct ubifs_info *c)
 
 	if (!dbg_is_chk_gen(c))
 		return 0;
-	if (random32() & 3)
+	if (prandom_u32() & 3)
 		return 0;
 
 	for (i = 0; i < c->lsave_cnt; i++)
 		c->lsave[i] = c->main_first;
 
 	list_for_each_entry(lprops, &c->empty_list, list)
-		c->lsave[random32() % c->lsave_cnt] = lprops->lnum;
+		c->lsave[prandom_u32() % c->lsave_cnt] = lprops->lnum;
 	list_for_each_entry(lprops, &c->freeable_list, list)
-		c->lsave[random32() % c->lsave_cnt] = lprops->lnum;
+		c->lsave[prandom_u32() % c->lsave_cnt] = lprops->lnum;
 	list_for_each_entry(lprops, &c->frdi_idx_list, list)
-		c->lsave[random32() % c->lsave_cnt] = lprops->lnum;
+		c->lsave[prandom_u32() % c->lsave_cnt] = lprops->lnum;
 
 	heap = &c->lpt_heap[LPROPS_DIRTY_IDX - 1];
 	for (i = 0; i < heap->cnt; i++)
-		c->lsave[random32() % c->lsave_cnt] = heap->arr[i]->lnum;
+		c->lsave[prandom_u32() % c->lsave_cnt] = heap->arr[i]->lnum;
 	heap = &c->lpt_heap[LPROPS_DIRTY - 1];
 	for (i = 0; i < heap->cnt; i++)
-		c->lsave[random32() % c->lsave_cnt] = heap->arr[i]->lnum;
+		c->lsave[prandom_u32() % c->lsave_cnt] = heap->arr[i]->lnum;
 	heap = &c->lpt_heap[LPROPS_FREE - 1];
 	for (i = 0; i < heap->cnt; i++)
-		c->lsave[random32() % c->lsave_cnt] = heap->arr[i]->lnum;
+		c->lsave[prandom_u32() % c->lsave_cnt] = heap->arr[i]->lnum;
 
 	return 1;
 }

fs/ubifs/tnc_commit.c

@@ -683,7 +683,7 @@ static int alloc_idx_lebs(struct ubifs_info *c, int cnt)
 		c->ilebs[c->ileb_cnt++] = lnum;
 		dbg_cmt("LEB %d", lnum);
 	}
-	if (dbg_is_chk_index(c) && !(random32() & 7))
+	if (dbg_is_chk_index(c) && !(prandom_u32() & 7))
 		return -ENOSPC;
 	return 0;
 }