Rename local variables in cmpxchg macro to avoid shadowing when used
inside try_cmpxchg, which also declares __old. Clang complains about
"variable '__old' is uninitialised when used within its own
initialisation" due to the nested macro expansion.
Cover-letter:
ext4l: Infrastructure and fixes for write support (part K)
This series adds infrastructure and bug fixes needed for ext4l write
support. It includes:
- kmem_cache implementation controlled by CONFIG_LIB_KMEM_CACHE
- Bit operation functions imported from Linux (find_bit, fns)
- Little-endian bit operations for ext4 bitmaps
- Buffer I/O infrastructure for write operations
- Folio and buffer head fixes for U-Boot's malloc'd buffers
- Inode handling fixes (i_mode, i_blocks, iput eviction)
- Journal cleanup detection in bh_cache_clear()
- Various bug fixes for clang warnings and multi-word bit operations
END
Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>
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