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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 /arch/x86 | |
| parent | 9017217b6f45e9045b2621b02cbc5605a566b803 (diff) | |
| download | linux-e1073d1e7920946ac4776a619cc40668b9e1401b.tar.bz2 | |
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 'arch/x86')
| -rw-r--r-- | arch/x86/Kconfig | 2 | ||||
| -rw-r--r-- | arch/x86/include/asm/hugetlb.h | 4 |
2 files changed, 5 insertions, 1 deletions
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 1dbbe38f6ec0..fe53a3aa805a 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -22,7 +22,7 @@ config X86_64 def_bool y depends on 64BIT # Options that are inherently 64-bit kernel only: - select ARCH_HAS_GIGANTIC_PAGE + select ARCH_HAS_GIGANTIC_PAGE if (MEMORY_ISOLATION && COMPACTION) || CMA select ARCH_SUPPORTS_INT128 select ARCH_USE_CMPXCHG_LOCKREF select HAVE_ARCH_SOFT_DIRTY diff --git a/arch/x86/include/asm/hugetlb.h b/arch/x86/include/asm/hugetlb.h index 3a106165e03a..535af0f2d8ac 100644 --- a/arch/x86/include/asm/hugetlb.h +++ b/arch/x86/include/asm/hugetlb.h @@ -85,4 +85,8 @@ static inline void arch_clear_hugepage_flags(struct page *page) { } +#ifdef CONFIG_ARCH_HAS_GIGANTIC_PAGE +static inline bool gigantic_page_supported(void) { return true; } +#endif + #endif /* _ASM_X86_HUGETLB_H */ |