diff options
| author | Dominik Dingel <dingel@linux.vnet.ibm.com> | 2015-07-17 16:23:37 -0700 |
|---|---|---|
| committer | Sasha Levin <sasha.levin@oracle.com> | 2016-05-10 12:20:18 -0400 |
| commit | e583da6d2b7a035f1c8a526da37b1b8b3bb59166 (patch) | |
| tree | 136c61550366babd57f53abd595a49d2a803462b /include | |
| parent | 837d4fb351122928fec781a8ff2686fc0d0fe2dc (diff) | |
| download | lwn-e583da6d2b7a035f1c8a526da37b1b8b3bb59166.tar.gz lwn-e583da6d2b7a035f1c8a526da37b1b8b3bb59166.zip | |
mm: hugetlb: allow hugepages_supported to be architecture specific
[ Upstream commit 2531c8cf56a640cd7d17057df8484e570716a450 ]
s390 has a constant hugepage size, by setting HPAGE_SHIFT we also change
e.g. the pageblock_order, which should be independent in respect to
hugepage support.
With this patch every architecture is free to define how to check
for hugepage support.
Signed-off-by: Dominik Dingel <dingel@linux.vnet.ibm.com>
Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Cc: Christian Borntraeger <borntraeger@de.ibm.com>
Cc: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Cc: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Sasha Levin <sasha.levin@oracle.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/hugetlb.h | 17 |
1 files changed, 8 insertions, 9 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 14020c7796af..e6192934cdfa 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -415,15 +415,14 @@ static inline spinlock_t *huge_pte_lockptr(struct hstate *h, return &mm->page_table_lock; } -static inline bool hugepages_supported(void) -{ - /* - * Some platform decide whether they support huge pages at boot - * time. On these, such as powerpc, HPAGE_SHIFT is set to 0 when - * there is no such support - */ - return HPAGE_SHIFT != 0; -} +#ifndef hugepages_supported +/* + * Some platform decide whether they support huge pages at boot + * time. Some of them, such as powerpc, set HPAGE_SHIFT to 0 + * when there is no such support + */ +#define hugepages_supported() (HPAGE_SHIFT != 0) +#endif #else /* CONFIG_HUGETLB_PAGE */ struct hstate {}; |