3 files changed, 67 insertions, 66 deletions

diff --git a/arch/i386/kernel/quirks.c b/arch/i386/kernel/quirks.c
index aaf89cb2bc5..87ccdac8492 100644
--- a/arch/i386/kernel/quirks.c
+++ b/arch/i386/kernel/quirks.c
@@ -25,8 +25,7 @@ static void __devinit quirk_intel_irqbalance(struct pci_dev *dev)
 
         /* enable access to config space*/
         pci_read_config_byte(dev, 0xf4, &config);
-        config |= 0x2;
-        pci_write_config_byte(dev, 0xf4, config);
+        pci_write_config_byte(dev, 0xf4, config|0x2);
 
         /* read xTPR register */
         raw_pci_ops->read(0, 0, 0x40, 0x4c, 2, &word);
@@ -42,9 +41,9 @@ static void __devinit quirk_intel_irqbalance(struct pci_dev *dev)
 #endif
         }
 
-        config &= ~0x2;
-        /* disable access to config space*/
-        pci_write_config_byte(dev, 0xf4, config);
+        /* put back the original value for config space*/
+        if (!(config & 0x2))
+                pci_write_config_byte(dev, 0xf4, config);
 }
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_E7320_MCH,  quirk_intel_irqbalance);
 DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL,    PCI_DEVICE_ID_INTEL_E7525_MCH,  quirk_intel_irqbalance);
diff --git a/arch/i386/kernel/signal.c b/arch/i386/kernel/signal.c
index adcd069db91..963616d364e 100644
--- a/arch/i386/kernel/signal.c
+++ b/arch/i386/kernel/signal.c
@@ -37,51 +37,17 @@
 asmlinkage int
 sys_sigsuspend(int history0, int history1, old_sigset_t mask)
 {
-        struct pt_regs * regs = (struct pt_regs *) &history0;
-        sigset_t saveset;
-
         mask &= _BLOCKABLE;
         spin_lock_irq(&current->sighand->siglock);
-        saveset = current->blocked;
+        current->saved_sigmask = current->blocked;
         siginitset(&current->blocked, mask);
         recalc_sigpending();
         spin_unlock_irq(&current->sighand->siglock);
 
-        regs->eax = -EINTR;
-        while (1) {
-                current->state = TASK_INTERRUPTIBLE;
-                schedule();
-                if (do_signal(regs, &saveset))
-                        return -EINTR;
-        }
-}
-
-asmlinkage int
-sys_rt_sigsuspend(struct pt_regs regs)
-{
-        sigset_t saveset, newset;
-
-        /* XXX: Don't preclude handling different sized sigset_t's.  */
-        if (regs.ecx != sizeof(sigset_t))
-                return -EINVAL;
-
-        if (copy_from_user(&newset, (sigset_t __user *)regs.ebx, sizeof(newset)))
-                return -EFAULT;
-        sigdelsetmask(&newset, ~_BLOCKABLE);
-
-        spin_lock_irq(&current->sighand->siglock);
-        saveset = current->blocked;
-        current->blocked = newset;
-        recalc_sigpending();
-        spin_unlock_irq(&current->sighand->siglock);
-
-        regs.eax = -EINTR;
-        while (1) {
-                current->state = TASK_INTERRUPTIBLE;
-                schedule();
-                if (do_signal(&regs, &saveset))
-                        return -EINTR;
-        }
+        current->state = TASK_INTERRUPTIBLE;
+        schedule();
+        set_thread_flag(TIF_RESTORE_SIGMASK);
+        return -ERESTARTNOHAND;
 }
 
 asmlinkage int 
@@ -433,11 +399,11 @@ static int setup_frame(int sig, struct k_sigaction *ka,
                 current->comm, current->pid, frame, regs->eip, frame->pretcode);
 #endif
 
-        return 1;
+        return 0;
 
 give_sigsegv:
         force_sigsegv(sig, current);
-        return 0;
+        return -EFAULT;
 }
 
 static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
@@ -527,11 +493,11 @@ static int setup_rt_frame(int sig, struct k_sigaction *ka, siginfo_t *info,
                 current->comm, current->pid, frame, regs->eip, frame->pretcode);
 #endif
 
-        return 1;
+        return 0;
 
 give_sigsegv:
         force_sigsegv(sig, current);
-        return 0;
+        return -EFAULT;
 }
 
 /*
@@ -581,7 +547,7 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
         else
                 ret = setup_frame(sig, ka, oldset, regs);
 
-        if (ret) {
+        if (ret == 0) {
                 spin_lock_irq(&current->sighand->siglock);
                 sigorsets(&current->blocked,&current->blocked,&ka->sa.sa_mask);
                 if (!(ka->sa.sa_flags & SA_NODEFER))
@@ -598,11 +564,12 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
  * want to handle. Thus you cannot kill init even with a SIGKILL even by
  * mistake.
  */
-int fastcall do_signal(struct pt_regs *regs, sigset_t *oldset)
+static void fastcall do_signal(struct pt_regs *regs)
 {
         siginfo_t info;
         int signr;
         struct k_sigaction ka;
+        sigset_t *oldset;
 
         /*
          * We want the common case to go fast, which
@@ -613,12 +580,14 @@ int fastcall do_signal(struct pt_regs *regs, sigset_t *oldset)
          * CS suffices.
          */
         if (!user_mode(regs))
-                return 1;
+                return;
 
         if (try_to_freeze())
                 goto no_signal;
 
-        if (!oldset)
+        if (test_thread_flag(TIF_RESTORE_SIGMASK))
+                oldset = &current->saved_sigmask;
+        else
                 oldset = &current->blocked;
 
         signr = get_signal_to_deliver(&info, &ka, regs, NULL);
@@ -628,38 +597,55 @@ int fastcall do_signal(struct pt_regs *regs, sigset_t *oldset)
                  * have been cleared if the watchpoint triggered
                  * inside the kernel.
                  */
-                if (unlikely(current->thread.debugreg[7])) {
+                if (unlikely(current->thread.debugreg[7]))
                         set_debugreg(current->thread.debugreg[7], 7);
-                }
 
                 /* Whee!  Actually deliver the signal.  */
-                return handle_signal(signr, &info, &ka, oldset, regs);
+                if (handle_signal(signr, &info, &ka, oldset, regs) == 0) {
+                        /* a signal was successfully delivered; the saved
+                         * sigmask will have been stored in the signal frame,
+                         * and will be restored by sigreturn, so we can simply
+                         * clear the TIF_RESTORE_SIGMASK flag */
+                        if (test_thread_flag(TIF_RESTORE_SIGMASK))
+                                clear_thread_flag(TIF_RESTORE_SIGMASK);
+                }
+
+                return;
         }
 
- no_signal:
+no_signal:
         /* Did we come from a system call? */
         if (regs->orig_eax >= 0) {
                 /* Restart the system call - no handlers present */
-                if (regs->eax == -ERESTARTNOHAND ||
-                    regs->eax == -ERESTARTSYS ||
-                    regs->eax == -ERESTARTNOINTR) {
+                switch (regs->eax) {
+                case -ERESTARTNOHAND:
+                case -ERESTARTSYS:
+                case -ERESTARTNOINTR:
                         regs->eax = regs->orig_eax;
                         regs->eip -= 2;
-                }
-                if (regs->eax == -ERESTART_RESTARTBLOCK){
+                        break;
+
+                case -ERESTART_RESTARTBLOCK:
                         regs->eax = __NR_restart_syscall;
                         regs->eip -= 2;
+                        break;
                 }
         }
-        return 0;
+
+        /* if there's no signal to deliver, we just put the saved sigmask
+         * back */
+        if (test_thread_flag(TIF_RESTORE_SIGMASK)) {
+                clear_thread_flag(TIF_RESTORE_SIGMASK);
+                sigprocmask(SIG_SETMASK, &current->saved_sigmask, NULL);
+        }
 }
 
 /*
  * notification of userspace execution resumption
- * - triggered by current->work.notify_resume
+ * - triggered by the TIF_WORK_MASK flags
  */
 __attribute__((regparm(3)))
-void do_notify_resume(struct pt_regs *regs, sigset_t *oldset,
+void do_notify_resume(struct pt_regs *regs, void *_unused,
                       __u32 thread_info_flags)
 {
         /* Pending single-step? */
@@ -667,9 +653,10 @@ void do_notify_resume(struct pt_regs *regs, sigset_t *oldset,
                 regs->eflags |= TF_MASK;
                 clear_thread_flag(TIF_SINGLESTEP);
         }
+
         /* deal with pending signal delivery */
-        if (thread_info_flags & _TIF_SIGPENDING)
-                do_signal(regs,oldset);
+        if (thread_info_flags & (_TIF_SIGPENDING | _TIF_RESTORE_SIGMASK))
+                do_signal(regs);
         
         clear_thread_flag(TIF_IRET);
 }
diff --git a/arch/i386/kernel/syscall_table.S b/arch/i386/kernel/syscall_table.S
index 6ff3e524322..1b665928336 100644
--- a/arch/i386/kernel/syscall_table.S
+++ b/arch/i386/kernel/syscall_table.S
@@ -294,3 +294,18 @@ ENTRY(sys_call_table)
         .long sys_inotify_add_watch
         .long sys_inotify_rm_watch
         .long sys_migrate_pages
+        .long sys_openat                /* 295 */
+        .long sys_mkdirat
+        .long sys_mknodat
+        .long sys_fchownat
+        .long sys_futimesat
+        .long sys_newfstatat            /* 300 */
+        .long sys_unlinkat
+        .long sys_renameat
+        .long sys_linkat
+        .long sys_symlinkat
+        .long sys_readlinkat            /* 305 */
+        .long sys_fchmodat
+        .long sys_faccessat
+        .long sys_pselect6
+        .long sys_ppoll