Merge branch 'akpm' (patches from Andrew)

Merge more updates from Andrew Morton:

 - almost all of the rest of MM

 - misc bits

 - KASAN updates

 - procfs

 - lib/ updates

 - checkpatch updates

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (124 commits)
  checkpatch: remove false unbalanced braces warning
  checkpatch: notice unbalanced else braces in a patch
  checkpatch: add another old address for the FSF
  checkpatch: update $logFunctions
  checkpatch: warn on logging continuations
  checkpatch: warn on embedded function names
  lib/lz4: remove back-compat wrappers
  fs/pstore: fs/squashfs: change usage of LZ4 to work with new LZ4 version
  crypto: change LZ4 modules to work with new LZ4 module version
  lib/decompress_unlz4: change module to work with new LZ4 module version
  lib: update LZ4 compressor module
  lib/test_sort.c: make it explicitly non-modular
  lib: add CONFIG_TEST_SORT to enable self-test of sort()
  rbtree: use designated initializers
  linux/kernel.h: fix DIV_ROUND_CLOSEST to support negative divisors
  lib/find_bit.c: micro-optimise find_next_*_bit
  lib: add module support to atomic64 tests
  lib: add module support to glob tests
  lib: add module support to crc32 tests
  kernel/ksysfs.c: add __ro_after_init to bin_attribute structure
  ...

2 files changed, 11 insertions, 13 deletions

diff --git a/tools/lib/find_bit.c b/tools/lib/find_bit.c
index 6d8b8f22cf55..42c15f906aac 100644
--- a/tools/lib/find_bit.c
+++ b/tools/lib/find_bit.c
@@ -34,7 +34,7 @@ static unsigned long _find_next_bit(const unsigned long *addr,
 {
         unsigned long tmp;
 
-        if (!nbits || start >= nbits)
+        if (unlikely(start >= nbits))
                 return nbits;
 
         tmp = addr[start / BITS_PER_LONG] ^ invert;
diff --git a/tools/testing/selftests/vm/userfaultfd.c b/tools/testing/selftests/vm/userfaultfd.c
index 5a840a605a16..e9449c801888 100644
--- a/tools/testing/selftests/vm/userfaultfd.c
+++ b/tools/testing/selftests/vm/userfaultfd.c
@@ -398,12 +398,12 @@ static void *uffd_poll_thread(void *arg)
                         uffd = msg.arg.fork.ufd;
                         pollfd[0].fd = uffd;
                         break;
-                case UFFD_EVENT_MADVDONTNEED:
-                        uffd_reg.range.start = msg.arg.madv_dn.start;
-                        uffd_reg.range.len = msg.arg.madv_dn.end -
-                                msg.arg.madv_dn.start;
+                case UFFD_EVENT_REMOVE:
+                        uffd_reg.range.start = msg.arg.remove.start;
+                        uffd_reg.range.len = msg.arg.remove.end -
+                                msg.arg.remove.start;
                         if (ioctl(uffd, UFFDIO_UNREGISTER, &uffd_reg.range))
-                                fprintf(stderr, "madv_dn failure\n"), exit(1);
+                                fprintf(stderr, "remove failure\n"), exit(1);
                         break;
                 case UFFD_EVENT_REMAP:
                         area_dst = (char *)(unsigned long)msg.arg.remap.to;
@@ -569,9 +569,9 @@ static int userfaultfd_open(int features)
  * part is accessed after mremap. Since hugetlbfs does not support
  * mremap, the entire monitored area is accessed in a single pass for
  * HUGETLB_TEST.
- * The release of the pages currently generates event only for
- * anonymous memory (UFFD_EVENT_MADVDONTNEED), hence it is not checked
- * for hugetlb and shmem.
+ * The release of the pages currently generates event for shmem and
+ * anonymous memory (UFFD_EVENT_REMOVE), hence it is not checked
+ * for hugetlb.
  */
 static int faulting_process(void)
 {
@@ -610,7 +610,6 @@ static int faulting_process(void)
                 }
         }
 
-#ifndef SHMEM_TEST
         if (release_pages(area_dst))
                 return 1;
 
@@ -618,7 +617,6 @@ static int faulting_process(void)
                 if (my_bcmp(area_dst + nr * page_size, zeropage, page_size))
                         fprintf(stderr, "nr %lu is not zero\n", nr), exit(1);
         }
-#endif /* SHMEM_TEST */
 
 #endif /* HUGETLB_TEST */
 
@@ -715,14 +713,14 @@ static int userfaultfd_events_test(void)
         pid_t pid;
         char c;
 
-        printf("testing events (fork, remap, madv_dn): ");
+        printf("testing events (fork, remap, remove): ");
         fflush(stdout);
 
         if (release_pages(area_dst))
                 return 1;
 
         features = UFFD_FEATURE_EVENT_FORK | UFFD_FEATURE_EVENT_REMAP |
-                UFFD_FEATURE_EVENT_MADVDONTNEED;
+                UFFD_FEATURE_EVENT_REMOVE;
         if (userfaultfd_open(features) < 0)
                 return 1;
         fcntl(uffd, F_SETFL, uffd_flags | O_NONBLOCK);