Merge branch 'stable/xen-pcifront-fixes' of git://git.kernel.org/pub/scm/linux/kernel...

[pandora-kernel.git] / arch / tile / kernel / signal.c

diff --git a/arch/tile/kernel/signal.c b/arch/tile/kernel/signal.c
index ce183aa..687719d 100644 (file)
--- a/arch/tile/kernel/signal.c
+++ b/arch/tile/kernel/signal.c
@@ -41,8 +41,8 @@
 #define _BLOCKABLE (~(sigmask(SIGKILL) | sigmask(SIGSTOP)))
 
 
-long _sys_sigaltstack(const stack_t __user *uss,
-                     stack_t __user *uoss, struct pt_regs *regs)
+SYSCALL_DEFINE3(sigaltstack, const stack_t __user *, uss,
+               stack_t __user *, uoss, struct pt_regs *, regs)
 {
        return do_sigaltstack(uss, uoss, regs->sp);
 }
@@ -71,6 +71,9 @@ int restore_sigcontext(struct pt_regs *regs,
        for (i = 0; i < sizeof(struct pt_regs)/sizeof(long); ++i)
                err |= __get_user(regs->regs[i], &sc->gregs[i]);
 
+       /* Ensure that the PL is always set to USER_PL. */
+       regs->ex1 = PL_ICS_EX1(USER_PL, EX1_ICS(regs->ex1));
+
        regs->faultnum = INT_SWINT_1_SIGRETURN;
 
        err |= __get_user(*pr0, &sc->gregs[0]);
@@ -78,7 +81,7 @@ int restore_sigcontext(struct pt_regs *regs,
 }
 
 /* sigreturn() returns long since it restores r0 in the interrupted code. */
-long _sys_rt_sigreturn(struct pt_regs *regs)
+SYSCALL_DEFINE1(rt_sigreturn, struct pt_regs *, regs)
 {
        struct rt_sigframe __user *frame =
                (struct rt_sigframe __user *)(regs->sp);
@@ -330,7 +333,7 @@ void do_signal(struct pt_regs *regs)
                        current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
                }
 
-               return;
+               goto done;
        }
 
        /* Did we come from a system call? */
@@ -358,4 +361,8 @@ void do_signal(struct pt_regs *regs)
                current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
                sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
        }
+
+done:
+       /* Avoid double syscall restart if there are nested signals. */
+       regs->faultnum = INT_SWINT_1_SIGRETURN;
 }