1 files changed, 13 insertions, 47 deletions

diff --git a/arch/x86/kernel/signal.c b/arch/x86/kernel/signal.c
index 2e937a5ad531..21af737053aa 100644
--- a/arch/x86/kernel/signal.c
+++ b/arch/x86/kernel/signal.c
@@ -555,7 +555,6 @@ unsigned long sys_sigreturn(struct pt_regs *regs)
                                     sizeof(frame->extramask))))
                 goto badframe;
 
-        sigdelsetmask(&set, ~_BLOCKABLE);
         set_current_blocked(&set);
 
         if (restore_sigcontext(regs, &frame->sc, &ax))
@@ -581,7 +580,6 @@ long sys_rt_sigreturn(struct pt_regs *regs)
         if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
                 goto badframe;
 
-        sigdelsetmask(&set, ~_BLOCKABLE);
         set_current_blocked(&set);
 
         if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ax))
@@ -647,42 +645,28 @@ setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
                 struct pt_regs *regs)
 {
         int usig = signr_convert(sig);
-        sigset_t *set = &current->blocked;
-        int ret;
-
-        if (current_thread_info()->status & TS_RESTORE_SIGMASK)
-                set = &current->saved_sigmask;
+        sigset_t *set = sigmask_to_save();
 
         /* Set up the stack frame */
         if (is_ia32) {
                 if (ka->sa.sa_flags & SA_SIGINFO)
-                        ret = ia32_setup_rt_frame(usig, ka, info, set, regs);
+                        return ia32_setup_rt_frame(usig, ka, info, set, regs);
                 else
-                        ret = ia32_setup_frame(usig, ka, set, regs);
+                        return ia32_setup_frame(usig, ka, set, regs);
 #ifdef CONFIG_X86_X32_ABI
         } else if (is_x32) {
-                ret = x32_setup_rt_frame(usig, ka, info,
+                return x32_setup_rt_frame(usig, ka, info,
                                          (compat_sigset_t *)set, regs);
 #endif
         } else {
-                ret = __setup_rt_frame(sig, ka, info, set, regs);
-        }
-
-        if (ret) {
-                force_sigsegv(sig, current);
-                return -EFAULT;
+                return __setup_rt_frame(sig, ka, info, set, regs);
         }
-
-        current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
-        return ret;
 }
 
-static int
+static void
 handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
                 struct pt_regs *regs)
 {
-        int ret;
-
         /* Are we from a system call? */
         if (syscall_get_nr(current, regs) >= 0) {
                 /* If so, check system call restarting.. */
@@ -713,10 +697,10 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
             likely(test_and_clear_thread_flag(TIF_FORCED_TF)))
                 regs->flags &= ~X86_EFLAGS_TF;
 
-        ret = setup_rt_frame(sig, ka, info, regs);
-
-        if (ret)
-                return ret;
+        if (setup_rt_frame(sig, ka, info, regs) < 0) {
+                force_sigsegv(sig, current);
+                return;
+        }
 
         /*
          * Clear the direction flag as per the ABI for function entry.
@@ -731,12 +715,8 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
          */
         regs->flags &= ~X86_EFLAGS_TF;
 
-        block_sigmask(ka, sig);
-
-        tracehook_signal_handler(sig, info, ka, regs,
-                                 test_thread_flag(TIF_SINGLESTEP));
-
-        return 0;
+        signal_delivered(sig, info, ka, regs,
+                         test_thread_flag(TIF_SINGLESTEP));
 }
 
 #ifdef CONFIG_X86_32
@@ -757,16 +737,6 @@ static void do_signal(struct pt_regs *regs)
         siginfo_t info;
         int signr;
 
-        /*
-         * We want the common case to go fast, which is why we may in certain
-         * cases get here from kernel mode. Just return without doing anything
-         * if so.
-         * X86_32: vm86 regs switched out by assembly code before reaching
-         * here, so testing against kernel CS suffices.
-         */
-        if (!user_mode(regs))
-                return;
-
         signr = get_signal_to_deliver(&info, &ka, regs, NULL);
         if (signr > 0) {
                 /* Whee! Actually deliver the signal.  */
@@ -796,10 +766,7 @@ static void do_signal(struct pt_regs *regs)
          * If there's no signal to deliver, we just put the saved sigmask
          * back.
          */
-        if (current_thread_info()->status & TS_RESTORE_SIGMASK) {
-                current_thread_info()->status &= ~TS_RESTORE_SIGMASK;
-                set_current_blocked(&current->saved_sigmask);
-        }
+        restore_saved_sigmask();
 }
 
 /*
@@ -934,7 +901,6 @@ asmlinkage long sys32_x32_rt_sigreturn(struct pt_regs *regs)
         if (__copy_from_user(&set, &frame->uc.uc_sigmask, sizeof(set)))
                 goto badframe;
 
-        sigdelsetmask(&set, ~_BLOCKABLE);
         set_current_blocked(&set);
 
         if (restore_sigcontext(regs, &frame->uc.uc_mcontext, &ax))