diff options
| -rw-r--r-- | include/linux/kernel.h | 1 | ||||
| -rw-r--r-- | mm/percpu.c | 3 |
2 files changed, 3 insertions, 1 deletions
diff --git a/include/linux/kernel.h b/include/linux/kernel.h index bc6ed52a39b9..0dc0b21bd164 100644 --- a/include/linux/kernel.h +++ b/include/linux/kernel.h @@ -45,6 +45,7 @@ #define REPEAT_BYTE(x) ((~0ul / 0xff) * (x)) +/* @a is a power of 2 value */ #define ALIGN(x, a) __ALIGN_KERNEL((x), (a)) #define __ALIGN_MASK(x, mask) __ALIGN_KERNEL_MASK((x), (mask)) #define PTR_ALIGN(p, a) ((typeof(p))ALIGN((unsigned long)(p), (a))) diff --git a/mm/percpu.c b/mm/percpu.c index 255714302394..99d8abd4c1e7 100644 --- a/mm/percpu.c +++ b/mm/percpu.c @@ -886,7 +886,8 @@ static void __percpu *pcpu_alloc(size_t size, size_t align, bool reserved, size = ALIGN(size, 2); - if (unlikely(!size || size > PCPU_MIN_UNIT_SIZE || align > PAGE_SIZE)) { + if (unlikely(!size || size > PCPU_MIN_UNIT_SIZE || align > PAGE_SIZE || + !is_power_of_2(align))) { WARN(true, "illegal size (%zu) or align (%zu) for percpu allocation\n", size, align); return NULL; |