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| author | Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> | 2017-07-06 15:39:17 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-06 16:24:33 -0700 |
| commit | e1073d1e7920946ac4776a619cc40668b9e1401b (patch) | |
| tree | f4d85b7801ea09471ce907faf1f16a0113d79fdd /mm/hugetlb.c | |
| parent | 9017217b6f45e9045b2621b02cbc5605a566b803 (diff) | |
| download | lwn-e1073d1e7920946ac4776a619cc40668b9e1401b.tar.gz lwn-e1073d1e7920946ac4776a619cc40668b9e1401b.zip | |
mm/hugetlb: clean up ARCH_HAS_GIGANTIC_PAGE
This moves the #ifdef in C code to a Kconfig dependency. Also we move
the gigantic_page_supported() function to be arch specific.
This allows architectures to conditionally enable runtime allocation of
gigantic huge page. Architectures like ppc64 supports different
gigantic huge page size (16G and 1G) based on the translation mode
selected. This provides an opportunity for ppc64 to enable runtime
allocation only w.r.t 1G hugepage.
No functional change in this patch.
Link: http://lkml.kernel.org/r/1494995292-4443-1-git-send-email-aneesh.kumar@linux.vnet.ibm.com
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Michael Ellerman <mpe@ellerman.id.au> (powerpc)
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 7 |
1 files changed, 2 insertions, 5 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 332637342555..c73828e43100 100644 --- a/mm/hugetlb.c +++ b/mm/hugetlb.c @@ -1040,9 +1040,7 @@ static int hstate_next_node_to_free(struct hstate *h, nodemask_t *nodes_allowed) ((node = hstate_next_node_to_free(hs, mask)) || 1); \ nr_nodes--) -#if defined(CONFIG_ARCH_HAS_GIGANTIC_PAGE) && \ - ((defined(CONFIG_MEMORY_ISOLATION) && defined(CONFIG_COMPACTION)) || \ - defined(CONFIG_CMA)) +#ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE static void destroy_compound_gigantic_page(struct page *page, unsigned int order) { @@ -1174,8 +1172,7 @@ static int alloc_fresh_gigantic_page(struct hstate *h, return 0; } -static inline bool gigantic_page_supported(void) { return true; } -#else +#else /* !CONFIG_ARCH_HAS_GIGANTIC_PAGE */ static inline bool gigantic_page_supported(void) { return false; } static inline void free_gigantic_page(struct page *page, unsigned int order) { } static inline void destroy_compound_gigantic_page(struct page *page, |