| From | Jiri Slaby <> | Subject | [PATCH 3.12 049/127] mm: hugetlb: allow hugepages_supported to be architecture specific | Date | Fri, 25 Nov 2016 09:29:22 +0100 |
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From: Dominik Dingel <dingel@linux.vnet.ibm.com>
3.12-stable review patch. If anyone has any objections, please let me know.
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commit 2531c8cf56a640cd7d17057df8484e570716a450 upstream.
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: Jiri Slaby <jslaby@suse.cz> --- include/linux/hugetlb.h | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-)
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 1eaf61dde2c3..6671b365ba60 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -395,15 +395,14 @@ static inline int hugepage_migration_support(struct hstate *h) #endif } -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 {}; -- 2.10.2
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