diff options
| author | Peter Zijlstra | 2013-11-14 23:31:52 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2013-11-15 01:32:20 +0100 |
| commit | 539edb5846c740d78a8b6c2e43a99ca4323df68f (patch) | |
| tree | dd03e1a7149f101f42311eac41e2857816cce36c /mm/memory.c | |
| parent | mm: dynamically allocate page->ptl if it cannot be embedded to struct page (diff) | |
| download | kernel-qcow2-linux-539edb5846c740d78a8b6c2e43a99ca4323df68f.tar.gz kernel-qcow2-linux-539edb5846c740d78a8b6c2e43a99ca4323df68f.tar.xz kernel-qcow2-linux-539edb5846c740d78a8b6c2e43a99ca4323df68f.zip | |
mm: properly separate the bloated ptl from the regular case
Use kernel/bounds.c to convert build-time spinlock_t size check into a
preprocessor symbol and apply that to properly separate the page::ptl
situation.
Signed-off-by: Peter Zijlstra <peterz@infradead.org>
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 11 |
1 files changed, 5 insertions, 6 deletions
diff --git a/mm/memory.c b/mm/memory.c index 24ffae2a530e..5d9025f3b3e1 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -4271,21 +4271,20 @@ void copy_user_huge_page(struct page *dst, struct page *src, } #endif /* CONFIG_TRANSPARENT_HUGEPAGE || CONFIG_HUGETLBFS */ -#if USE_SPLIT_PTE_PTLOCKS -bool __ptlock_alloc(struct page *page) +#if USE_SPLIT_PTE_PTLOCKS && BLOATED_SPINLOCKS +bool ptlock_alloc(struct page *page) { spinlock_t *ptl; ptl = kmalloc(sizeof(spinlock_t), GFP_KERNEL); if (!ptl) return false; - page->ptl = (unsigned long)ptl; + page->ptl = ptl; return true; } -void __ptlock_free(struct page *page) +void ptlock_free(struct page *page) { - if (sizeof(spinlock_t) > sizeof(page->ptl)) - kfree((spinlock_t *)page->ptl); + kfree(page->ptl); } #endif |