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authorPhillip Lougher <phillip@lougher.demon.co.uk>2009-08-06 15:09:31 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-08-07 10:39:56 -0700
commitb1af4315d823a2b6659c5b14bc17f7bc61878ef4 (patch)
treed9a04709f52c27f59a93875fd705dbed2c581b09 /lib/decompress_inflate.c
parentdaeb6b6fbe27049f465c48a7d0ee5555c3b84064 (diff)
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bzip2/lzma: remove nasty uncompressed size hack in pre-boot environment
decompress_bunzip2 and decompress_unlzma have a nasty hack that subtracts 4 from the input length if being called in the pre-boot environment. This is a nasty hack because it relies on the fact that flush = NULL only when called from the pre-boot environment (i.e. arch/x86/boot/compressed/misc.c). initramfs.c/do_mounts_rd.c pass in a flush buffer (flush != NULL). This hack prevents the decompressors from being used with flush = NULL by other callers unless knowledge of the hack is propagated to them. This patch removes the hack by making decompress (called only from the pre-boot environment) a wrapper function that subtracts 4 from the input length before calling the decompressor. Signed-off-by: Phillip Lougher <phillip@lougher.demon.co.uk> Cc: "H. Peter Anvin" <hpa@zytor.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'lib/decompress_inflate.c')
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