• Jeff Dike's avatar
    [PATCH] uml: fix oops related to exception table · 92eac952
    Jeff Dike authored
    
    
          Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
    
    Prevent the kernel from oopsing during the extable sorting, as it can do
    now, because the extable is in the readonly section of the binary.
    
    Jeff says: The exception table turned RO in 2.6.11-rc3-mm1 for some reason.
    Moving it causes it to land in the writable data section of the binary.
    
    Paolo says: This patch fixes a oops on startup, which can be easily
    triggered by compiling with CONFIG_MODE_TT disabled, and STATIC_LINK either
    disabled or enabled.  The resulting kernel will always Oops on startup,
    after printing this simple output:
    
    I've verified, by binary search on the BitKeeper repository (synced up as
    of 2.6.12-rc2), starting from the range 2.6.11-2.6.12-rc1, that this bug
    shows up on BitKeeper revisions in the range [@1.1994.11.168,+inf), i.e.
    starting from this:
    
    [PATCH] lib/sort: Replace insertion sort in exception tables
    
    Since UML does not use the exception table, it's likely that insertion sort
    didn't happen to write anything on the table.
    
    Signed-off-by: default avatarPaolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@osdl.org>
    92eac952