diff options
| -rw-r--r-- | include/linux/huge_mm.h | 16 | ||||
| -rw-r--r-- | kernel/futex.c | 6 |
2 files changed, 19 insertions, 3 deletions
diff --git a/include/linux/huge_mm.h b/include/linux/huge_mm.h index 528454c2caa9..be186410a879 100644 --- a/include/linux/huge_mm.h +++ b/include/linux/huge_mm.h @@ -180,6 +180,14 @@ static inline struct page *compound_trans_head(struct page *page) extern int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, unsigned long addr, pmd_t pmd, pmd_t *pmdp); +#ifndef arch_block_thp_split +#define arch_block_thp_split(mm) local_irq_disable() +#endif + +#ifndef arch_unblock_thp_split +#define arch_unblock_thp_split(mm) local_irq_enable() +#endif + #else /* CONFIG_TRANSPARENT_HUGEPAGE */ #define HPAGE_PMD_SHIFT ({ BUILD_BUG(); 0; }) #define HPAGE_PMD_MASK ({ BUILD_BUG(); 0; }) @@ -230,6 +238,14 @@ static inline int do_huge_pmd_numa_page(struct mm_struct *mm, struct vm_area_str return 0; } +#ifndef arch_block_thp_split +#define arch_block_thp_split(mm) do { } while (0) +#endif + +#ifndef arch_unblock_thp_split +#define arch_unblock_thp_split(mm) do { } while (0) +#endif + #endif /* CONFIG_TRANSPARENT_HUGEPAGE */ #endif /* _LINUX_HUGE_MM_H */ diff --git a/kernel/futex.c b/kernel/futex.c index 195983547d51..cfa9ee794ae1 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -286,7 +286,7 @@ again: if (unlikely(PageTail(page))) { put_page(page); /* serialize against __split_huge_page_splitting() */ - local_irq_disable(); + arch_block_thp_split(mm); if (likely(__get_user_pages_fast(address, 1, 1, &page) == 1)) { page_head = compound_head(page); /* @@ -303,9 +303,9 @@ again: get_page(page_head); put_page(page); } - local_irq_enable(); + arch_unblock_thp_split(mm); } else { - local_irq_enable(); + arch_unblock_thp_split(mm); goto again; } } |