From: Christophe Leroy <christophe.leroy@c-s.fr>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Paul Mackerras <paulus@samba.org>,
Michael Ellerman <mpe@ellerman.id.au>,
aneesh.kumar@linux.vnet.ibm.com
Cc: linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org
Subject: [PATCH v2 4/4] powerpc/mm: remove unnecessary test in pgtable_cache_init()
Date: Tue, 14 Aug 2018 14:54:48 +0000 (UTC) [thread overview]
Message-ID: <5c322925aee8231af448a302aead72834cdb2ef0.1534258290.git.christophe.leroy@c-s.fr> (raw)
In-Reply-To: <2f96bf1a8df1091c642de099ed07c34b5ab9b90a.1534258290.git.christophe.leroy@c-s.fr>
pgtable_cache_add() gracefully handles the case when a cache that
size already exists by returning early with the following test:
if (PGT_CACHE(shift))
return; /* Already have a cache of this size */
It is then not needed to test the existence of the cache before.
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
---
arch/powerpc/mm/init-common.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/powerpc/mm/init-common.c b/arch/powerpc/mm/init-common.c
index b7ca03643d0b..1e6910eb70ed 100644
--- a/arch/powerpc/mm/init-common.c
+++ b/arch/powerpc/mm/init-common.c
@@ -111,13 +111,13 @@ void pgtable_cache_init(void)
{
pgtable_cache_add(PGD_INDEX_SIZE);
- if (PMD_CACHE_INDEX && !PGT_CACHE(PMD_CACHE_INDEX))
+ if (PMD_CACHE_INDEX)
pgtable_cache_add(PMD_CACHE_INDEX);
/*
* In all current configs, when the PUD index exists it's the
* same size as either the pgd or pmd index except with THP enabled
* on book3s 64
*/
- if (PUD_CACHE_INDEX && !PGT_CACHE(PUD_CACHE_INDEX))
+ if (PUD_CACHE_INDEX)
pgtable_cache_add(PUD_CACHE_INDEX);
}
--
2.13.3
prev parent reply other threads:[~2018-08-14 14:55 UTC|newest]
Thread overview: 15+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-08-14 14:54 [PATCH v2 1/4] powerpc/mm: enable the use of page table cache of order 0 Christophe Leroy
2018-08-14 14:54 ` [PATCH v2 2/4] powerpc/mm: replace hugetlb_cache by PGT_CACHE(PTE_T_ORDER) Christophe Leroy
2018-08-14 14:54 ` [PATCH v2 3/4] powerpc/mm: fix a warning when a cache is common to PGD and hugepages Christophe Leroy
2018-08-17 3:32 ` Aneesh Kumar K.V
2018-08-17 10:44 ` Christophe LEROY
2018-08-22 14:04 ` Christophe LEROY
2018-08-22 14:20 ` Aneesh Kumar K.V
2018-08-23 9:40 ` Christophe LEROY
2018-08-23 10:36 ` Segher Boessenkool
2018-08-23 10:39 ` Christophe LEROY
[not found] ` <87a7pdl2jy.fsf@concordia.ellerman.id.au>
2018-08-23 13:32 ` Andrew Donnellan
2018-08-23 14:41 ` Segher Boessenkool
2018-08-23 14:50 ` Christophe LEROY
2018-08-24 5:44 ` Michael Ellerman
2018-08-14 14:54 ` Christophe Leroy [this message]
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