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luks2: Use grub_log2ull() to calculate log_sector_size and improve readability

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Signed-off-by: Glenn Washburn <development@efficientek.com>
Reviewed-by: Daniel Kiper <daniel.kiper@oracle.com>
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Glenn Washburn 2020-12-15 17:31:11 -06:00 committed by Daniel Kiper
parent 3ab19ba3b1
commit ec46685ed4
1 changed files with 1 additions and 2 deletions
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3
grub-core/disk/luks2.c
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@ -642,8 +642,7 @@ luks2_recover_key (grub_disk_t source,
/* Set up disk according to keyslot's segment. */
crypt->offset_sectors = grub_divmod64 (segment.offset, segment.sector_size, NULL);
crypt->log_sector_size = sizeof (unsigned int) * 8
- __builtin_clz ((unsigned int) segment.sector_size) - 1;
crypt->log_sector_size = grub_log2ull (segment.sector_size);
/* Set to the source disk/partition size, which is the maximum we allow. */
max_crypt_sectors = grub_disk_native_sectors (source);
max_crypt_sectors = grub_convert_sector (max_crypt_sectors, GRUB_DISK_SECTOR_BITS,