• Geert Uytterhoeven's avatar
    initramfs: Fix initramfs size for 32-bit arches · 96f93593
    Geert Uytterhoeven authored
    Commit ffe8018c ("initramfs: fix initramfs size calculation") broke
    32-bit big-endian arches like (on ARAnyM):
    
        VFS: Cannot open root device "hda1" or unknown-block(3,1)
        Please append a correct "root=" boot option; here are the available partitions:
        fe80         1059408 nfhd8  (driver?)
          fe81          921600 nfhd8p1 00000000-0000-0000-0000-000000000nfhd8p1
          fe82          137807 nfhd8p2 00000000-0000-0000-0000-000000000nfhd8p2
        0200            3280 fd0  (driver?)
        0201            3280 fd1  (driver?)
        0300         1059408 hda  driver: ide-gd
          0301          921600 hda1 00000000-0000-0000-0000-000000000hda1
          0302          137807 hda2 00000000-0000-0000-0000-000000000hda2
        Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(3,1)
    
    As pointed out by Kerstin Jonsson <kerstin.jonsson@ericsson.com>, this
    is due to CONFIG_32BIT not being defined, so the initramfs size field is
    done as a 64-bit quad.  On little-endian (like x86) this doesn matter,
    but on a big-endian machine the 32-bit reads will see the (zero) high
    bits.
    
    Only mips, s390, and score set CONFIG_32BIT for 32-bit builds, so fix it for
    all other 32-bit arches by inverting the logic and testing for CONFIG_64BIT,
    which should be defined on all 64-bit arches.
    Signed-off-by: default avatarGeert Uytterhoeven <geert@linux-m68k.org>
    [ I think we should just make it "u64" on all architectures and get
      rid of the whole #ifdef CONFIG_xxBIT   - Linus ]
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    96f93593
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