microblaze: prepare signal handling for generic unistd.h

We need to define set_restore_sigmask() in order to
get pselect and ppoll. Also, the setup_frame function
can not be used when __NR_sigreturn is not defined.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Michal Simek <monstr@monstr.eu>

2 files changed, 14 insertions, 0 deletions

diff --git a/arch/microblaze/include/asm/syscalls.h b/arch/microblaze/include/asm/syscalls.h
index 9cb4ff0edeb2..ddea9eb31f8d 100644
--- a/arch/microblaze/include/asm/syscalls.h
+++ b/arch/microblaze/include/asm/syscalls.h
@@ -34,6 +34,9 @@ asmlinkage int sys_rt_sigsuspend(sigset_t __user *unewset, size_t sigsetsize,
 asmlinkage int sys_sigaction(int sig, const struct old_sigaction *act,
                 struct old_sigaction *oact);
 
+asmlinkage long sys_rt_sigaction(int sig, const struct sigaction __user *act,
+                struct sigaction __user *oact, size_t sigsetsize);
+
 asmlinkage int sys_sigaltstack(const stack_t __user *uss, stack_t __user *uoss,
                 struct pt_regs *regs);
 
diff --git a/arch/microblaze/include/asm/thread_info.h b/arch/microblaze/include/asm/thread_info.h
index 4c3943e3f403..a0401d2ef8d5 100644
--- a/arch/microblaze/include/asm/thread_info.h
+++ b/arch/microblaze/include/asm/thread_info.h
@@ -154,6 +154,17 @@ static inline struct thread_info *current_thread_info(void)
  */
 /* FPU was used by this task this quantum (SMP) */
 #define TS_USEDFPU              0x0001
+#define TS_RESTORE_SIGMASK      0x0002
+
+#ifndef __ASSEMBLY__
+#define HAVE_SET_RESTORE_SIGMASK 1
+static inline void set_restore_sigmask(void)
+{
+        struct thread_info *ti = current_thread_info();
+        ti->status |= TS_RESTORE_SIGMASK;
+        set_bit(TIF_SIGPENDING, (unsigned long *)&ti->flags);
+}
+#endif
 
 #endif /* __KERNEL__ */
 #endif /* _ASM_MICROBLAZE_THREAD_INFO_H */