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| author | David Rientjes <rientjes@google.com> | 2011-11-19 14:33:57 +0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-11-19 15:15:59 +0400 |
| commit | a5c86e986f0b2fe779f13cf53ce6e9f467b03950 (patch) | |
| tree | 754679947f1e0b014d90ea526eef4f89b9f2afef | |
| parent | 208f6f6068836e10d526e87fef6ca4364f4ec068 (diff) | |
| download | linux-a5c86e986f0b2fe779f13cf53ce6e9f467b03950.tar.xz | |
hugetlb: remove dummy definitions of HPAGE_MASK and HPAGE_SIZE
Dummy, non-zero definitions for HPAGE_MASK and HPAGE_SIZE were added in
51c6f666fceb ("mm: ZAP_BLOCK causes redundant work") to avoid a divide
by zero in generic kernel code.
That code has since been removed, but probably should never have been
added in the first place: we don't want HPAGE_SIZE to act like PAGE_SIZE
for code that is working with hugepages, for example, when the
dependency on CONFIG_HUGETLB_PAGE has not been fulfilled.
Because hugepage size can differ from architecture to architecture, each
is required to have their own definitions for both HPAGE_MASK and
HPAGE_SIZE. This is always done in arch/*/include/asm/page.h.
So, just remove the dummy and dangerous definitions since they are no
longer needed and reveals the correct dependencies. Tested on
architectures using the definitions with allyesconfig: x86 (even with
thp), hppa, mips, powerpc, s390, sh3, sh4, sparc, and sparc64, and with
defconfig on ia64.
Signed-off-by: David Rientjes <rientjes@google.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | include/linux/hugetlb.h | 5 |
1 files changed, 0 insertions, 5 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h index 19644e0016bd..d9d6c868b86b 100644 --- a/include/linux/hugetlb.h +++ b/include/linux/hugetlb.h @@ -110,11 +110,6 @@ static inline void copy_huge_page(struct page *dst, struct page *src) #define hugetlb_change_protection(vma, address, end, newprot) -#ifndef HPAGE_MASK -#define HPAGE_MASK PAGE_MASK /* Keep the compiler happy */ -#define HPAGE_SIZE PAGE_SIZE -#endif - #endif /* !CONFIG_HUGETLB_PAGE */ #define HUGETLB_ANON_FILE "anon_hugepage" |