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f4068af3a6
Do one fork in vsyscall detection code and let SIGSEGV handler exit and carry information to the parent saving LOC. [adobriyan@gmail.com: redo original patch, delete unnecessary variables, minimise code changes] Link: https://lkml.kernel.org/r/YvoWzAn5dlhF75xa@localhost.localdomain Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: Brian Foster <bfoster@redhat.com> Reviewed-by: Brian Foster <bfoster@redhat.com> Tested-by: Brian Foster <bfoster@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>