diff options
Diffstat (limited to 'mm/memory.c')
-rw-r--r-- | mm/memory.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/mm/memory.c b/mm/memory.c index d05c6b1..24ffae2 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -4270,3 +4270,22 @@ 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) +{ + spinlock_t *ptl; + + ptl = kmalloc(sizeof(spinlock_t), GFP_KERNEL); + if (!ptl) + return false; + page->ptl = (unsigned long)ptl; + return true; +} + +void __ptlock_free(struct page *page) +{ + if (sizeof(spinlock_t) > sizeof(page->ptl)) + kfree((spinlock_t *)page->ptl); +} +#endif |