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  • Roland McGrath's avatar
    [PATCH] Fix CONFIG_COMPAT_VDSO · a1f3bb9a
    Roland McGrath authored
    
    
    I wouldn't mind if CONFIG_COMPAT_VDSO went away entirely.  But if it's there,
    it should work properly.  Currently it's quite haphazard: both real vma and
    fixmap are mapped, both are put in the two different AT_* slots, sysenter
    returns to the vma address rather than the fixmap address, and core dumps yet
    are another story.
    
    This patch makes CONFIG_COMPAT_VDSO disable the real vma and use the fixmap
    area consistently.  This makes it actually compatible with what the old vdso
    implementation did.
    
    Signed-off-by: default avatarRoland McGrath <roland@redhat.com>
    Cc: Ingo Molnar <mingo@elte.hu>
    Cc: Paul Mackerras <paulus@samba.org>
    Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
    Cc: Andi Kleen <ak@suse.de>
    Signed-off-by: default avatarAndrew Morton <akpm@osdl.org>
    Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
    a1f3bb9a