diff options
| -rw-r--r-- | util/mmap-alloc.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/util/mmap-alloc.c b/util/mmap-alloc.c index 5a85aa3c89..d713a72ddc 100644 --- a/util/mmap-alloc.c +++ b/util/mmap-alloc.c @@ -12,6 +12,7 @@ #include "qemu/osdep.h" #include "qemu/mmap-alloc.h" +#include "qemu/host-utils.h" #define HUGETLBFS_MAGIC 0x958458f6 @@ -61,18 +62,18 @@ void *qemu_ram_mmap(int fd, size_t size, size_t align, bool shared) #else void *ptr = mmap(0, total, PROT_NONE, MAP_ANONYMOUS | MAP_PRIVATE, -1, 0); #endif - size_t offset = QEMU_ALIGN_UP((uintptr_t)ptr, align) - (uintptr_t)ptr; + size_t offset; void *ptr1; if (ptr == MAP_FAILED) { return MAP_FAILED; } - /* Make sure align is a power of 2 */ - assert(!(align & (align - 1))); + assert(is_power_of_2(align)); /* Always align to host page size */ assert(align >= getpagesize()); + offset = QEMU_ALIGN_UP((uintptr_t)ptr, align) - (uintptr_t)ptr; ptr1 = mmap(ptr + offset, size, PROT_READ | PROT_WRITE, MAP_FIXED | (fd == -1 ? MAP_ANONYMOUS : 0) | |