Andreas Schwab 8474ba7419 m68k: Define asmlinkage_protect ... Make sure the compiler does not modify arguments of syscall functions. This can happen if the compiler generates a tailcall to another function. For example, without asmlinkage_protect sys_openat is compiled into this function: sys_openat: clr.l %d0 move.w 18(%sp),%d0 move.l %d0,16(%sp) jbra do_sys_open Note how the fourth argument is modified in place, modifying the register %d4 that gets restored from this stack slot when the function returns to user-space. The caller may expect the register to be unmodified across system calls. Signed-off-by: Andreas Schwab <schwab@linux-m68k.org> Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Cc: stable@vger.kernel.org		2015-09-28 09:59:45 +02:00
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asm	m68k: Define asmlinkage_protect	2015-09-28 09:59:45 +02:00
uapi/asm	m68k: Wire up membarrier	2015-09-28 09:59:44 +02:00