Commit e60fc5aa authored Jan 10, 2016 by Helge Deller

parisc: Fix __ARCH_SI_PREAMBLE_SIZE



On a 64bit kernel build the compiler aligns the _sifields union in the
struct siginfo_t on a 64bit address. The __ARCH_SI_PREAMBLE_SIZE define
compensates for this alignment and thus fixes the wait testcase of the
strace package.

The symptoms of a wrong __ARCH_SI_PREAMBLE_SIZE value is that
_sigchld.si_stime variable is missed to be copied and thus after a
copy_siginfo() will have uninitialized values.

Signed-off-by: Helge Deller <deller@gmx.de>
Cc: stable@vger.kernel.org

parent fc632575

arch/parisc/include/uapi/asm/siginfo.h

+4 −0

Original line number	Diff line number	Diff line
		#ifndef _PARISC_SIGINFO_H
		#define _PARISC_SIGINFO_H

		#if defined(__LP64__)
		#define __ARCH_SI_PREAMBLE_SIZE (4 * sizeof(int))
		#endif

		#include <asm-generic/siginfo.h>

		#undef NSIGTRAP