lib/stackdepot.c: use array_size() helper in jhash2()

Use array_size() helper instead of the open-coded version in jhash2().
These sorts of multiplication factors need to be wrapped in array_size().

Also, use the preferred form for passing the size of an object type.

Link: https://lkml.kernel.org/r/cb8a682e4bba4dbddd2bd8aca7f8c02fea89639b.1601565471.git.gustavoars@kernel.org
Signed-off-by: Gustavo A. R. Silva <gustavoars@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/lib/stackdepot.c b/lib/stackdepot.c
index 683b6a8ddade15b9f788bf86ed92a9ed71d3703f..890dcc2e984e363268939d2b678a3d5f117b7e56 100644 (file)
--- a/lib/stackdepot.c
+++ b/lib/stackdepot.c
@@ -154,8 +154,8 @@ static struct stack_record *stack_table[STACK_HASH_SIZE] = {
 static inline u32 hash_stack(unsigned long *entries, unsigned int size)
 {
        return jhash2((u32 *)entries,
-                              size * sizeof(unsigned long) / sizeof(u32),
-                              STACK_HASH_SEED);
+                     array_size(size,  sizeof(*entries)) / sizeof(u32),
+                     STACK_HASH_SEED);
 }
 
 /* Use our own, non-instrumented version of memcmp().