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authorMatthew Wilcox <willy@linux.intel.com>2016-05-20 17:03:01 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-05-20 17:58:30 -0700
commitb76ba4af4ddd6a06f7f65769e7be1bc56556cdf5 (patch)
treed7e4d94f0cc2e3c224949de671f2513fff0680db
parent6b053b8e5f5e12089fbbc127167199746bb5b4c1 (diff)
downloadlinux-b76ba4af4ddd6a06f7f65769e7be1bc56556cdf5.tar.bz2
drivers/hwspinlock: use correct radix tree API
radix_tree_is_indirect_ptr() is an internal API. The correct call to use is radix_tree_deref_retry() which has the appropriate unlikely() annotation. Fixes: c6400ba7e13a ("drivers/hwspinlock: fix race between radix tree insertion and lookup") Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Cc: Konstantin Khlebnikov <koct9i@gmail.com> Cc: Kirill Shutemov <kirill.shutemov@linux.intel.com> Cc: Jan Kara <jack@suse.com> Cc: Neil Brown <neilb@suse.de> Cc: Ross Zwisler <ross.zwisler@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--drivers/hwspinlock/hwspinlock_core.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/hwspinlock/hwspinlock_core.c b/drivers/hwspinlock/hwspinlock_core.c
index d50c701b19d6..4074441444fe 100644
--- a/drivers/hwspinlock/hwspinlock_core.c
+++ b/drivers/hwspinlock/hwspinlock_core.c
@@ -313,7 +313,7 @@ int of_hwspin_lock_get_id(struct device_node *np, int index)
hwlock = radix_tree_deref_slot(slot);
if (unlikely(!hwlock))
continue;
- if (radix_tree_is_indirect_ptr(hwlock)) {
+ if (radix_tree_deref_retry(hwlock)) {
slot = radix_tree_iter_retry(&iter);
continue;
}