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authorPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>2006-04-11 01:53:30 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-04-11 09:18:35 -0400
commitf2ea394082c5d1682e6a131c5981085b8752c6e9 (patch)
treeb7789cee4e6484d5063a28a59dcf320ee4676017 /arch/um/sys-ppc
parentcda402b283c34a24b091f78eee116963e9494762 (diff)
[PATCH] uml: safe migration path to the correct V3 COW format
- Correct the layout of all header versions - make all them well-specified for any external event. As we don't have 1-byte or 2-byte wide fields, the 32-bit layout (historical one) has no extra padding, so we can safely add __attribute__((packed)). - Add detection and reading of the broken 64-bit COW format which has been around for a while - to allow safe migration to the correct 32-bit format. Safe detection is possible, thanks to some luck with the existing format, and it works in practice. Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Jeff Dike <jdike@addtoit.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um/sys-ppc')
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