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commit783c3b53b9upstream. Implement s390 specific arch_uretprobe_is_alive() to avoid SIGSEGVs observed with uretprobes in combination with setjmp/longjmp. See commit2dea1d9c38("powerpc/uprobes: Implement arch_uretprobe_is_alive()") for more details. With this implemented all test cases referenced in the above commit pass. Reported-by: Ziqian SUN <zsun@redhat.com> Cc: <stable@vger.kernel.org> # v4.3+ Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>