The above warning was introduced originally in 436da3c "ext2load: increase read speed" and fixed for newer toolchains in b803273 "ext2fs: fix warning: 'blocknxt' may be used uninitialized". This change did not fix the warning with gcc 4.2, as found in ELDK 4.2.
If we rework the while loop to initalize blocknxt before entering the warning really goes away. Tested on am335x with an approx 7mb file and crc32 in U-Boot befor and after this change.
Cc: Wolfgang Denk wd@denx.de Cc: Eric Nelson eric.nelson@boundarydevices.com Cc: Thierry Reding thierry.reding@avionic-design.de Cc: Jason Cooper u-boot@lakedaemon.net Cc: Andreas Bießmann andreas.devel@googlemail.com Cc: Reinhard Arlt reinhard.arlt@esd-electronics.com Cc: Kim Phillips kim.phillips@freescale.com Signed-off-by: Tom Rini trini@ti.com --- fs/ext2/ext2fs.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/fs/ext2/ext2fs.c b/fs/ext2/ext2fs.c index 182f0ac..418404e 100644 --- a/fs/ext2/ext2fs.c +++ b/fs/ext2/ext2fs.c @@ -440,9 +440,8 @@ int ext2fs_read_file /* grab middle blocks in one go */ if (i != pos / blocksize && i < blockcnt - 1 && blockcnt > 3) { int oldblk = blknr; - int blocknxt; + int blocknxt = ext2fs_read_block(node, i + 1); while (i < blockcnt - 1) { - blocknxt = ext2fs_read_block(node, i + 1); if (blocknxt == (oldblk + 1)) { oldblk = blocknxt; i++; @@ -450,6 +449,7 @@ int ext2fs_read_file blocknxt = ext2fs_read_block(node, i); break; } + blocknxt = ext2fs_read_block(node, i); }
if (oldblk == blknr)