Message ID | 20200916200539.23268-1-mateusznosek0@gmail.com (mailing list archive) |
---|---|
State | New, archived |
Headers | show
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[188.147.112.12]) by smtp.gmail.com with ESMTPSA id q4sm3376728lfm.46.2020.09.16.13.06.19 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Sep 2020 13:06:20 -0700 (PDT) From: mateusznosek0@gmail.com To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Mateusz Nosek <mateusznosek0@gmail.com>, cl@linux.com, penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, akpm@linux-foundation.org Subject: [PATCH] mm/slab.c: micro-optimization spare one branch in main flow Date: Wed, 16 Sep 2020 22:05:39 +0200 Message-Id: <20200916200539.23268-1-mateusznosek0@gmail.com> X-Mailer: git-send-email 2.20.1 MIME-Version: 1.0 X-Rspamd-Queue-Id: 2EC051A4A5 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam04 Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000565, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: <linux-mm.kvack.org> |
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mm/slab.c: micro-optimization spare one branch in main flow
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diff --git a/mm/slab.c b/mm/slab.c index 2cb494d98fe9..e04ea756bcbc 100644 --- a/mm/slab.c +++ b/mm/slab.c @@ -4186,9 +4186,10 @@ size_t __ksize(const void *objp) struct kmem_cache *c; size_t size; - BUG_ON(!objp); - if (unlikely(objp == ZERO_SIZE_PTR)) + if (unlikely(ZERO_OR_NULL_PTR(objp))) { + BUG_ON(!objp); return 0; + } c = virt_to_cache(objp); size = c ? c->object_size : 0;