diff options
| author | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-05-03 21:41:35 +0200 |
|---|---|---|
| committer | Daniel Vetter <daniel.vetter@ffwll.ch> | 2017-05-03 21:41:35 +0200 |
| commit | ad15f74ac6c7ed1c7c252a760b017da042ec83fb (patch) | |
| tree | 0b8643ae709d8f413f9b58b544d65aeaf48a0c7a /mm/z3fold.c | |
| parent | 8a2d6ae1f737fd22eaeadd0dc32b85c92f239025 (diff) | |
| parent | 8b03d1ed2c43a2ba5ef3381322ee4515b97381bf (diff) | |
Merge tag 'tags/drm-for-v4.12' into drm-intel-next-queued
Backmerge the main drm-next pull to sync up.
Chris also pointed out that
commit ade0b0c965f59176daddbef9c4717354034f9bce
Author: Chris Wilson <chris@chris-wilson.co.uk>
Date: Sat Apr 22 09:15:37 2017 +0100
drm/i915: Confirm the request is still active before adding it to the await
is double-applied in the git merge, so make sure we get this right.
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Diffstat (limited to 'mm/z3fold.c')
| -rw-r--r-- | mm/z3fold.c | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/mm/z3fold.c b/mm/z3fold.c index f9492bccfd79..54f63c4a809a 100644 --- a/mm/z3fold.c +++ b/mm/z3fold.c @@ -185,6 +185,12 @@ static inline void z3fold_page_lock(struct z3fold_header *zhdr) spin_lock(&zhdr->page_lock); } +/* Try to lock a z3fold page */ +static inline int z3fold_page_trylock(struct z3fold_header *zhdr) +{ + return spin_trylock(&zhdr->page_lock); +} + /* Unlock a z3fold page */ static inline void z3fold_page_unlock(struct z3fold_header *zhdr) { @@ -385,7 +391,7 @@ static int z3fold_alloc(struct z3fold_pool *pool, size_t size, gfp_t gfp, spin_lock(&pool->lock); zhdr = list_first_entry_or_null(&pool->unbuddied[i], struct z3fold_header, buddy); - if (!zhdr) { + if (!zhdr || !z3fold_page_trylock(zhdr)) { spin_unlock(&pool->lock); continue; } @@ -394,7 +400,6 @@ static int z3fold_alloc(struct z3fold_pool *pool, size_t size, gfp_t gfp, spin_unlock(&pool->lock); page = virt_to_page(zhdr); - z3fold_page_lock(zhdr); if (zhdr->first_chunks == 0) { if (zhdr->middle_chunks != 0 && chunks >= zhdr->start_middle) |