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-rw-r--r--lib/stackdepot.c19
1 files changed, 16 insertions, 3 deletions
diff --git a/lib/stackdepot.c b/lib/stackdepot.c
index f87d138e9672..e513459a5601 100644
--- a/lib/stackdepot.c
+++ b/lib/stackdepot.c
@@ -163,6 +163,21 @@ static inline u32 hash_stack(unsigned long *entries, unsigned int size)
STACK_HASH_SEED);
}
+/* Use our own, non-instrumented version of memcmp().
+ *
+ * We actually don't care about the order, just the equality.
+ */
+static inline
+int stackdepot_memcmp(const unsigned long *u1, const unsigned long *u2,
+ unsigned int n)
+{
+ for ( ; n-- ; u1++, u2++) {
+ if (*u1 != *u2)
+ return 1;
+ }
+ return 0;
+}
+
/* Find a stack that is equal to the one stored in entries in the hash */
static inline struct stack_record *find_stack(struct stack_record *bucket,
unsigned long *entries, int size,
@@ -173,10 +188,8 @@ static inline struct stack_record *find_stack(struct stack_record *bucket,
for (found = bucket; found; found = found->next) {
if (found->hash == hash &&
found->size == size &&
- !memcmp(entries, found->entries,
- size * sizeof(unsigned long))) {
+ !stackdepot_memcmp(entries, found->entries, size))
return found;
- }
}
return NULL;
}