diff options
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/Kconfig | 2 | ||||
| -rw-r--r-- | mm/memory.c | 19 |
2 files changed, 19 insertions, 2 deletions
diff --git a/mm/Kconfig b/mm/Kconfig index 7aa02def4666..de31af256207 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -218,8 +218,6 @@ config SPLIT_PTLOCK_CPUS int default "999999" if ARM && !CPU_CACHE_VIPT default "999999" if PARISC && !PA20 - default "999999" if DEBUG_SPINLOCK || DEBUG_LOCK_ALLOC - default "999999" if !64BIT && GENERIC_LOCKBREAK default "4" config ARCH_ENABLE_SPLIT_PMD_PTLOCK diff --git a/mm/memory.c b/mm/memory.c index d05c6b10e926..24ffae2a530e 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 |