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| author | Dominik Dingel <dingel@linux.vnet.ibm.com> | 2015-07-18 01:23:37 +0200 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-07-18 01:39:52 +0200 |
| commit | 2531c8cf56a640cd7d17057df8484e570716a450 (patch) | |
| tree | f1796f4e8d2debc9190413dc00b93a178145e9ef /include | |
| parent | revert "s390/mm: make hugepages_supported a boot time decision" (diff) | |
| download | linux-2531c8cf56a640cd7d17057df8484e570716a450.tar.xz linux-2531c8cf56a640cd7d17057df8484e570716a450.zip | |
mm: hugetlb: allow hugepages_supported to be architecture specific
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>
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 205026175c42..d891f949466a 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -460,15 +460,14 @@ 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 {}; |