diff options
Diffstat (limited to 'drivers/firmware/efi/libstub/random.c')
| -rw-r--r-- | drivers/firmware/efi/libstub/random.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/drivers/firmware/efi/libstub/random.c b/drivers/firmware/efi/libstub/random.c index 0c9f58c5ba50..f8e2e5ae6872 100644 --- a/drivers/firmware/efi/libstub/random.c +++ b/drivers/firmware/efi/libstub/random.c @@ -8,6 +8,7 @@ */ #include <linux/efi.h> +#include <linux/log2.h> #include <asm/efi.h> #include "efistub.h" @@ -41,8 +42,9 @@ efi_status_t efi_get_random_bytes(efi_system_table_t *sys_table_arg, */ static unsigned long get_entry_num_slots(efi_memory_desc_t *md, unsigned long size, - unsigned long align) + unsigned long align_shift) { + unsigned long align = 1UL << align_shift; u64 start, end; if (md->type != EFI_CONVENTIONAL_MEMORY) @@ -55,7 +57,7 @@ static unsigned long get_entry_num_slots(efi_memory_desc_t *md, if (start > end) return 0; - return (end - start + 1) / align; + return (end - start + 1) >> align_shift; } /* @@ -98,7 +100,7 @@ efi_status_t efi_random_alloc(efi_system_table_t *sys_table_arg, efi_memory_desc_t *md = (void *)memory_map + map_offset; unsigned long slots; - slots = get_entry_num_slots(md, size, align); + slots = get_entry_num_slots(md, size, ilog2(align)); MD_NUM_SLOTS(md) = slots; total_slots += slots; } |