treewide: use get_random_u32_below() instead of deprecated function

This is a simple mechanical transformation done by:

@@
expression E;
@@
- prandom_u32_max
+ get_random_u32_below
  (E)

Reviewed-by: Kees Cook <keescook@chromium.org>
Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: Darrick J. Wong <djwong@kernel.org> # for xfs
Reviewed-by: SeongJae Park <sj@kernel.org> # for damon
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> # for infiniband
Reviewed-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> # for arm
Acked-by: Ulf Hansson <ulf.hansson@linaro.org> # for mmc
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

4 files changed, 7 insertions, 7 deletions

diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c
index 25a54e04560e..38159f39e2af 100644
--- a/kernel/bpf/core.c
+++ b/kernel/bpf/core.c
@@ -1032,7 +1032,7 @@ bpf_jit_binary_alloc(unsigned int proglen, u8 **image_ptr,
 	hdr->size = size;
 	hole = min_t(unsigned int, size - (proglen + sizeof(*hdr)),
 		     PAGE_SIZE - sizeof(*hdr));
-	start = prandom_u32_max(hole) & ~(alignment - 1);
+	start = get_random_u32_below(hole) & ~(alignment - 1);
 
 	/* Leave a random number of instructions before BPF code. */
 	*image_ptr = &hdr->image[start];
@@ -1094,7 +1094,7 @@ bpf_jit_binary_pack_alloc(unsigned int proglen, u8 **image_ptr,
 
 	hole = min_t(unsigned int, size - (proglen + sizeof(*ro_header)),
 		     BPF_PROG_CHUNK_SIZE - sizeof(*ro_header));
-	start = prandom_u32_max(hole) & ~(alignment - 1);
+	start = get_random_u32_below(hole) & ~(alignment - 1);
 
 	*image_ptr = &ro_header->image[start];
 	*rw_image = &(*rw_header)->image[start];
diff --git a/kernel/kcsan/selftest.c b/kernel/kcsan/selftest.c
index 1740ce389e7f..7b619f16a492 100644
--- a/kernel/kcsan/selftest.c
+++ b/kernel/kcsan/selftest.c
@@ -31,8 +31,8 @@ static bool __init test_encode_decode(void)
 	int i;
 
 	for (i = 0; i < ITERS_PER_TEST; ++i) {
-		size_t size = prandom_u32_max(MAX_ENCODABLE_SIZE) + 1;
-		bool is_write = !!prandom_u32_max(2);
+		size_t size = get_random_u32_below(MAX_ENCODABLE_SIZE) + 1;
+		bool is_write = !!get_random_u32_below(2);
 		unsigned long verif_masked_addr;
 		long encoded_watchpoint;
 		bool verif_is_write;
diff --git a/kernel/locking/test-ww_mutex.c b/kernel/locking/test-ww_mutex.c
index 43efb2a04160..29dc253d03af 100644
--- a/kernel/locking/test-ww_mutex.c
+++ b/kernel/locking/test-ww_mutex.c
@@ -399,7 +399,7 @@ static int *get_random_order(int count)
 		order[n] = n;
 
 	for (n = count - 1; n > 1; n--) {
-		r = prandom_u32_max(n + 1);
+		r = get_random_u32_below(n + 1);
 		if (r != n) {
 			tmp = order[n];
 			order[n] = order[r];
@@ -538,7 +538,7 @@ static void stress_one_work(struct work_struct *work)
 {
 	struct stress *stress = container_of(work, typeof(*stress), work);
 	const int nlocks = stress->nlocks;
-	struct ww_mutex *lock = stress->locks + prandom_u32_max(nlocks);
+	struct ww_mutex *lock = stress->locks + get_random_u32_below(nlocks);
 	int err;
 
 	do {
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index 8058bec87ace..9cf32ccda715 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -310,7 +310,7 @@ static void clocksource_verify_choose_cpus(void)
 	 * CPUs that are currently online.
 	 */
 	for (i = 1; i < n; i++) {
-		cpu = prandom_u32_max(nr_cpu_ids);
+		cpu = get_random_u32_below(nr_cpu_ids);
 		cpu = cpumask_next(cpu - 1, cpu_online_mask);
 		if (cpu >= nr_cpu_ids)
 			cpu = cpumask_first(cpu_online_mask);