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authorBoris Brezillon <boris.brezillon@free-electrons.com>2017-08-28 18:04:15 +0200
committerBoris Brezillon <boris.brezillon@free-electrons.com>2017-08-28 18:04:15 +0200
commit5ffa70b2a38befadb920b85fe87f5da2b4cff623 (patch)
tree411b1d357731db5e2611f0ca67082a8c909b7d9d /kernel/futex.c
parentmtd: make device_type const (diff)
parentLinux 4.13-rc7 (diff)
downloadlinux-dev-5ffa70b2a38befadb920b85fe87f5da2b4cff623.tar.xz
linux-dev-5ffa70b2a38befadb920b85fe87f5da2b4cff623.zip
Merge tag 'v4.13-rc7' into mtd/next
Merge v4.13-rc7 back to resolve merge conflicts in drivers/mtd/nand/nandsim.c and include/asm-generic/vmlinux.lds.h.
Diffstat (limited to 'kernel/futex.c')
-rw-r--r--kernel/futex.c9
1 files changed, 5 insertions, 4 deletions
diff --git a/kernel/futex.c b/kernel/futex.c
index c934689043b2..f50b434756c1 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -212,7 +212,7 @@ struct futex_pi_state {
atomic_t refcount;
union futex_key key;
-};
+} __randomize_layout;
/**
* struct futex_q - The hashed futex queue entry, one per waiting task
@@ -246,7 +246,7 @@ struct futex_q {
struct rt_mutex_waiter *rt_waiter;
union futex_key *requeue_pi_key;
u32 bitset;
-};
+} __randomize_layout;
static const struct futex_q futex_q_init = {
/* list gets initialized in queue_me()*/
@@ -670,13 +670,14 @@ again:
* this reference was taken by ihold under the page lock
* pinning the inode in place so i_lock was unnecessary. The
* only way for this check to fail is if the inode was
- * truncated in parallel so warn for now if this happens.
+ * truncated in parallel which is almost certainly an
+ * application bug. In such a case, just retry.
*
* We are not calling into get_futex_key_refs() in file-backed
* cases, therefore a successful atomic_inc return below will
* guarantee that get_futex_key() will still imply smp_mb(); (B).
*/
- if (WARN_ON_ONCE(!atomic_inc_not_zero(&inode->i_count))) {
+ if (!atomic_inc_not_zero(&inode->i_count)) {
rcu_read_unlock();
put_page(page);