Merge branch 'akpm' (patches from Andrew)

Merge misc updates from Andrew Morton:

 - kasan updates

 - procfs

 - lib/bitmap updates

 - other lib/ updates

 - checkpatch tweaks

 - rapidio

 - ubsan

 - pipe fixes and cleanups

 - lots of other misc bits

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (114 commits)
  Documentation/sysctl/user.txt: fix typo
  MAINTAINERS: update ARM/QUALCOMM SUPPORT patterns
  MAINTAINERS: update various PALM patterns
  MAINTAINERS: update "ARM/OXNAS platform support" patterns
  MAINTAINERS: update Cortina/Gemini patterns
  MAINTAINERS: remove ARM/CLKDEV SUPPORT file pattern
  MAINTAINERS: remove ANDROID ION pattern
  mm: docs: add blank lines to silence sphinx "Unexpected indentation" errors
  mm: docs: fix parameter names mismatch
  mm: docs: fixup punctuation
  pipe: read buffer limits atomically
  pipe: simplify round_pipe_size()
  pipe: reject F_SETPIPE_SZ with size over UINT_MAX
  pipe: fix off-by-one error when checking buffer limits
  pipe: actually allow root to exceed the pipe buffer limits
  pipe, sysctl: remove pipe_proc_fn()
  pipe, sysctl: drop 'min' parameter from pipe-max-size converter
  kasan: rework Kconfig settings
  crash_dump: is_kdump_kernel can be boolean
  kernel/mutex: mutex_is_locked can be boolean
  ...

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;
 }