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commitdbbfe487e5upstream. Git commit616498813b"s390: system call path micro optimization" introduced a regression in regard to system call restarting and inferior function calls via the ptrace interface. The pointer to the system call table needs to be loaded in sysc_sigpending if do_signal returns with TIF_SYSCALl set after it restored a system call context. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>