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| author | Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> | 2012-03-21 16:34:27 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2012-03-21 17:55:02 -0700 |
| commit | d8c37c480678ebe09bc570f33e085e28049db035 (patch) | |
| tree | c8c53fde803f1a9655f44193c97db76dc4a90fe1 /mm | |
| parent | 8d32ff84401f1addb961c7af2c8d9baceb0ab9ba (diff) | |
| download | lwn-d8c37c480678ebe09bc570f33e085e28049db035.tar.gz lwn-d8c37c480678ebe09bc570f33e085e28049db035.zip | |
thp: add HPAGE_PMD_* definitions for !CONFIG_TRANSPARENT_HUGEPAGE
These macros will be used in a later patch, where all usages are expected
to be optimized away without #ifdef CONFIG_TRANSPARENT_HUGEPAGE. But to
detect unexpected usages, we convert the existing BUG() to BUILD_BUG().
[akpm@linux-foundation.org: fix build in mm/pgtable-generic.c]
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Acked-by: Hillf Danton <dhillf@gmail.com>
Reviewed-by: Andrea Arcangeli <aarcange@redhat.com>
Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Acked-by: David Rientjes <rientjes@google.com>
Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/pgtable-generic.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/mm/pgtable-generic.c b/mm/pgtable-generic.c index eb663fb533e0..5a74fea182f1 100644 --- a/mm/pgtable-generic.c +++ b/mm/pgtable-generic.c @@ -70,10 +70,11 @@ int pmdp_clear_flush_young(struct vm_area_struct *vma, unsigned long address, pmd_t *pmdp) { int young; -#ifndef CONFIG_TRANSPARENT_HUGEPAGE +#ifdef CONFIG_TRANSPARENT_HUGEPAGE + VM_BUG_ON(address & ~HPAGE_PMD_MASK); +#else BUG(); #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ - VM_BUG_ON(address & ~HPAGE_PMD_MASK); young = pmdp_test_and_clear_young(vma, address, pmdp); if (young) flush_tlb_range(vma, address, address + HPAGE_PMD_SIZE); |