To prepare for supporting boot-time page size selection, refactor code to remove assumptions about PAGE_SIZE being compile-time constant. Code intended to be equivalent when compile-time page size is active. Convert CPP PAGE_SIZE conditionals to C if/else. For compile-time page size, the compiler will strip the dead part, and for boot-time page size, the condition will be evaluated at run time. Signed-off-by: Ryan Roberts <ryan.roberts@xxxxxxx> --- ***NOTE*** Any confused maintainers may want to read the cover note here for context: https://lore.kernel.org/all/20241014105514.3206191-1-ryan.roberts@xxxxxxx/ fs/ext4/ext4.h | 36 ++++++++++++++++++------------------ 1 file changed, 18 insertions(+), 18 deletions(-) diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h index 08acd152261ed..1a6dbd925024a 100644 --- a/fs/ext4/ext4.h +++ b/fs/ext4/ext4.h @@ -2415,31 +2415,31 @@ ext4_rec_len_from_disk(__le16 dlen, unsigned blocksize) { unsigned len = le16_to_cpu(dlen); -#if (PAGE_SIZE >= 65536) - if (len == EXT4_MAX_REC_LEN || len == 0) - return blocksize; - return (len & 65532) | ((len & 3) << 16); -#else - return len; -#endif + if (PAGE_SIZE >= 65536) { + if (len == EXT4_MAX_REC_LEN || len == 0) + return blocksize; + return (len & 65532) | ((len & 3) << 16); + } else { + return len; + } } static inline __le16 ext4_rec_len_to_disk(unsigned len, unsigned blocksize) { BUG_ON((len > blocksize) || (blocksize > (1 << 18)) || (len & 3)); -#if (PAGE_SIZE >= 65536) - if (len < 65536) + if (PAGE_SIZE >= 65536) { + if (len < 65536) + return cpu_to_le16(len); + if (len == blocksize) { + if (blocksize == 65536) + return cpu_to_le16(EXT4_MAX_REC_LEN); + else + return cpu_to_le16(0); + } + return cpu_to_le16((len & 65532) | ((len >> 16) & 3)); + } else { return cpu_to_le16(len); - if (len == blocksize) { - if (blocksize == 65536) - return cpu_to_le16(EXT4_MAX_REC_LEN); - else - return cpu_to_le16(0); } - return cpu_to_le16((len & 65532) | ((len >> 16) & 3)); -#else - return cpu_to_le16(len); -#endif } /* -- 2.43.0
