smallsolar/u-boot
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ext4l: Implement little-endian bit operations

Browse Source 
The ext4 block allocator uses little-endian bit operations on block
bitmaps. Implement these operations by wrapping the existing
set/test/clear_bit() functions.

Add find_next_zero_bit() to search for free blocks in bitmaps.

Co-developed-by: Claude Opus 4.5 <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
This commit is contained in:
Simon Glass
2025-12-27 21:20:37 -07:00
parent 104ee92c32
commit bb745f843c
1 changed files with 8 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files

14
fs/ext4l/ext4_uboot.h
View File

@@ -349,13 +349,15 @@ struct buffer_head *sb_getblk(struct super_block *sb, sector_t block);
* We implement them in interface.c for sandbox.
*/
/* Little-endian bit operations */
#define __set_bit_le(nr, addr) ((void)(nr), (void)(addr))
#define test_bit_le(nr, addr) ({ (void)(nr); (void)(addr); 0; })
/* Little-endian bit operations - use arch-provided find_next_zero_bit */
#define find_next_zero_bit_le(addr, size, offset) \
({ (void)(addr); (void)(size); (offset); })
#define __test_and_clear_bit_le(nr, addr) ({ (void)(nr); (void)(addr); 0; })
#define __test_and_set_bit_le(nr, addr) ({ (void)(nr); (void)(addr); 0; })
find_next_zero_bit((void *)addr, size, offset)
#define __set_bit_le(nr, addr) set_bit(nr, addr)
#define test_bit_le(nr, addr) test_bit(nr, addr)
#define __test_and_clear_bit_le(nr, addr) \
({ int __old = test_bit(nr, addr); clear_bit(nr, addr); __old; })
#define __test_and_set_bit_le(nr, addr) \
({ int __old = test_bit(nr, addr); set_bit(nr, addr); __old; })
/* KUNIT stub */
#define KUNIT_STATIC_STUB_REDIRECT(...) do { } while (0)