diff options
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/mm.h | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h index 9dcdf13570fb..9392723a5c50 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -1051,6 +1051,19 @@ static __always_inline vma_flags_t __mk_vma_flags(size_t count, } /* + * Test whether a specific VMA flag is set, e.g.: + * + * if (vma_flags_test(flags, VMA_READ_BIT)) { ... } + */ +static __always_inline bool vma_flags_test(const vma_flags_t *flags, + vma_flag_t bit) +{ + const unsigned long *bitmap = flags->__vma_flags; + + return test_bit((__force int)bit, bitmap); +} + +/* * Helper macro which bitwise-or combines the specified input flags into a * vma_flags_t bitmap value. E.g.: * @@ -1956,8 +1969,8 @@ static inline bool vma_desc_is_cow_mapping(struct vm_area_desc *desc) { const vma_flags_t *flags = &desc->vma_flags; - return vma_flags_test_any(flags, VMA_MAYWRITE_BIT) && - !vma_flags_test_any(flags, VMA_SHARED_BIT); + return vma_flags_test(flags, VMA_MAYWRITE_BIT) && + !vma_flags_test(flags, VMA_SHARED_BIT); } #ifndef CONFIG_MMU |