Merge git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile

* git://git.kernel.org/pub/scm/linux/kernel/git/cmetcalf/linux-tile:
  arch/tile: mark "hardwall" device as non-seekable
  asm-generic/stat.h: support 64-bit file time_t for stat()
  arch/tile: don't allow user code to set the PL via ptrace or signal return
  arch/tile: correct double syscall restart for nested signals
  arch/tile: avoid __must_check warning on one strict_strtol check
  arch/tile: bomb raw_local_irq_ to arch_local_irq_
  arch/tile: complete migration to new kmap_atomic scheme

1 files changed, 8 insertions, 1 deletions

diff --git a/arch/tile/kernel/signal.c b/arch/tile/kernel/signal.c
index fb28e85ae3ae..687719d4abd1 100644
--- a/arch/tile/kernel/signal.c
+++ b/arch/tile/kernel/signal.c
@@ -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]);
@@ -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;
 }