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| author | Davidlohr Bueso <dave@stgolabs.net> | 2018-08-21 22:01:45 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2018-08-22 10:52:52 -0700 |
| commit | 93f976b5190df32793908d49165f78e67fcb66cf (patch) | |
| tree | 1ea0ab13c02e21d479ecdc2118f27769cd9cbd5d /lib/rhashtable.c | |
| parent | 82061c57ce93caa50fd01c11f8eb30ddc4c4bd75 (diff) | |
| download | lwn-93f976b5190df32793908d49165f78e67fcb66cf.tar.gz lwn-93f976b5190df32793908d49165f78e67fcb66cf.zip | |
lib/rhashtable: simplify bucket_table_alloc()
As of ce91f6ee5b3b ("mm: kvmalloc does not fallback to vmalloc for
incompatible gfp flags") we can simplify the caller and trust kvzalloc()
to just do the right thing. For the case of the GFP_ATOMIC context, we
can drop the __GFP_NORETRY flag for obvious reasons, and for the
__GFP_NOWARN case, however, it is changed such that the caller passes the
flag instead of making bucket_table_alloc() handle it.
This slightly changes the gfp flags passed on to nested_table_alloc() as
it will now also use GFP_ATOMIC | __GFP_NOWARN. However, I consider this
a positive consequence as for the same reasons we want nowarn semantics in
bucket_table_alloc().
[manfred@colorfullife.com: commit id extended to 12 digits, line wraps updated]
Link: http://lkml.kernel.org/r/20180712185241.4017-8-manfred@colorfullife.com
Signed-off-by: Davidlohr Bueso <dbueso@suse.de>
Signed-off-by: Manfred Spraul <manfred@colorfullife.com>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Dmitry Vyukov <dvyukov@google.com>
Cc: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Kees Cook <keescook@chromium.org>
Cc: Michael Kerrisk <mtk.manpages@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/rhashtable.c')
| -rw-r--r-- | lib/rhashtable.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/lib/rhashtable.c b/lib/rhashtable.c index ae4223e0f5bc..238c8daa9852 100644 --- a/lib/rhashtable.c +++ b/lib/rhashtable.c @@ -174,10 +174,7 @@ static struct bucket_table *bucket_table_alloc(struct rhashtable *ht, int i; size = sizeof(*tbl) + nbuckets * sizeof(tbl->buckets[0]); - if (gfp != GFP_KERNEL) - tbl = kzalloc(size, gfp | __GFP_NOWARN | __GFP_NORETRY); - else - tbl = kvzalloc(size, gfp); + tbl = kvzalloc(size, gfp); size = nbuckets; @@ -450,7 +447,7 @@ static int rhashtable_insert_rehash(struct rhashtable *ht, err = -ENOMEM; - new_tbl = bucket_table_alloc(ht, size, GFP_ATOMIC); + new_tbl = bucket_table_alloc(ht, size, GFP_ATOMIC | __GFP_NOWARN); if (new_tbl == NULL) goto fail; |