Update from upstream with manual merge of Yasunori Goto's

changes to swiotlb.c made in commit 281dd25cdc0d6903929b79183816d151ea626341
since this file has been moved from arch/ia64/lib/swiotlb.c to
lib/swiotlb.c

Signed-off-by: Tony Luck <tony.luck@intel.com>

5 files changed, 41 insertions, 27 deletions

diff --git a/arch/alpha/kernel/entry.S b/arch/alpha/kernel/entry.S
index 76cc0cb..e38671c 100644
--- a/arch/alpha/kernel/entry.S
+++ b/arch/alpha/kernel/entry.S
@@ -196,6 +196,7 @@ entUna:
 	stq	$26, 208($sp)
 	stq	$27, 216($sp)
 	stq	$28, 224($sp)
+	mov	$sp, $19
 	stq	$gp, 232($sp)
 	lda	$8, 0x3fff
 	stq	$31, 248($sp)
diff --git a/arch/alpha/kernel/osf_sys.c b/arch/alpha/kernel/osf_sys.c
index 0636116..01fe990d 100644
--- a/arch/alpha/kernel/osf_sys.c
+++ b/arch/alpha/kernel/osf_sys.c
@@ -37,6 +37,7 @@
 #include <linux/namei.h>
 #include <linux/uio.h>
 #include <linux/vfs.h>
+#include <linux/rcupdate.h>
 
 #include <asm/fpu.h>
 #include <asm/io.h>
@@ -975,6 +976,7 @@ osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp,
 	long timeout;
 	int ret = -EINVAL;
 	struct fdtable *fdt;
+	int max_fdset;
 
 	timeout = MAX_SCHEDULE_TIMEOUT;
 	if (tvp) {
@@ -996,8 +998,11 @@ osf_select(int n, fd_set __user *inp, fd_set __user *outp, fd_set __user *exp,
 		}
 	}
 
+	rcu_read_lock();
 	fdt = files_fdtable(current->files);
-	if (n < 0 || n > fdt->max_fdset)
+	max_fdset = fdt->max_fdset;
+	rcu_read_unlock();
+	if (n < 0 || n > max_fdset)
 		goto out_nofds;
 
 	/*
diff --git a/arch/alpha/kernel/process.c b/arch/alpha/kernel/process.c
index fa98dae..eb20c3a 100644
--- a/arch/alpha/kernel/process.c
+++ b/arch/alpha/kernel/process.c
@@ -127,6 +127,10 @@ common_shutdown_1(void *generic_ptr)
 	/* If booted from SRM, reset some of the original environment. */
 	if (alpha_using_srm) {
 #ifdef CONFIG_DUMMY_CONSOLE
+		/* If we've gotten here after SysRq-b, leave interrupt
+		   context before taking over the console. */
+		if (in_interrupt())
+			irq_exit();
 		/* This has the effect of resetting the VGA video origin.  */
 		take_over_console(&dummy_con, 0, MAX_NR_CONSOLES-1, 1);
 #endif
diff --git a/arch/alpha/kernel/sys_dp264.c b/arch/alpha/kernel/sys_dp264.c
index 9e36b07..d5da6b1 100644
--- a/arch/alpha/kernel/sys_dp264.c
+++ b/arch/alpha/kernel/sys_dp264.c
@@ -395,6 +395,22 @@ clipper_init_irq(void)
  */
 
 static int __init
+isa_irq_fixup(struct pci_dev *dev, int irq)
+{
+	u8 irq8;
+
+	if (irq > 0)
+		return irq;
+
+	/* This interrupt is routed via ISA bridge, so we'll
+	   just have to trust whatever value the console might
+	   have assigned.  */
+	pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq8);
+
+	return irq8 & 0xf;
+}
+
+static int __init
 dp264_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
 {
 	static char irq_tab[6][5] __initdata = {
@@ -407,25 +423,13 @@ dp264_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
 		{ 16+ 3, 16+ 3, 16+ 2, 16+ 1, 16+ 0}  /* IdSel 10 slot 3 */
 	};
 	const long min_idsel = 5, max_idsel = 10, irqs_per_slot = 5;
-
 	struct pci_controller *hose = dev->sysdata;
 	int irq = COMMON_TABLE_LOOKUP;
 
-	if (irq > 0) {
+	if (irq > 0)
 		irq += 16 * hose->index;
-	} else {
-		/* ??? The Contaq IDE controller on the ISA bridge uses
-		   "legacy" interrupts 14 and 15.  I don't know if anything
-		   can wind up at the same slot+pin on hose1, so we'll
-		   just have to trust whatever value the console might
-		   have assigned.  */
-
-		u8 irq8;
-		pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &irq8);
-		irq = irq8;
-	}
 
-	return irq;
+	return isa_irq_fixup(dev, irq);
 }
 
 static int __init
@@ -453,7 +457,8 @@ monet_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
 		{    24,    24,    25,    26,    27}  /* IdSel 15 slot 5 PCI2*/
 	};
 	const long min_idsel = 3, max_idsel = 15, irqs_per_slot = 5;
-	return COMMON_TABLE_LOOKUP;
+
+	return isa_irq_fixup(dev, COMMON_TABLE_LOOKUP);
 }
 
 static u8 __init
@@ -507,7 +512,8 @@ webbrick_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
 		{    47,    47,    46,    45,    44}, /* IdSel 17 slot 3 */
 	};
 	const long min_idsel = 7, max_idsel = 17, irqs_per_slot = 5;
-	return COMMON_TABLE_LOOKUP;
+
+	return isa_irq_fixup(dev, COMMON_TABLE_LOOKUP);
 }
 
 static int __init
@@ -524,14 +530,13 @@ clipper_map_irq(struct pci_dev *dev, u8 slot, u8 pin)
 		{    -1,    -1,    -1,    -1,    -1}  /* IdSel 7 ISA Bridge */
 	};
 	const long min_idsel = 1, max_idsel = 7, irqs_per_slot = 5;
-
 	struct pci_controller *hose = dev->sysdata;
 	int irq = COMMON_TABLE_LOOKUP;
 
 	if (irq > 0)
 		irq += 16 * hose->index;
 
-	return irq;
+	return isa_irq_fixup(dev, irq);
 }
 
 static void __init
diff --git a/arch/alpha/kernel/traps.c b/arch/alpha/kernel/traps.c
index 6f509a6..f9d1231 100644
--- a/arch/alpha/kernel/traps.c
+++ b/arch/alpha/kernel/traps.c
@@ -446,16 +446,15 @@ struct unaligned_stat {
 
 
 /* Macro for exception fixup code to access integer registers.  */
-#define una_reg(r)  (regs.regs[(r) >= 16 && (r) <= 18 ? (r)+19 : (r)])
+#define una_reg(r)  (regs->regs[(r) >= 16 && (r) <= 18 ? (r)+19 : (r)])
 
 
 asmlinkage void
 do_entUna(void * va, unsigned long opcode, unsigned long reg,
-	  unsigned long a3, unsigned long a4, unsigned long a5,
-	  struct allregs regs)
+	  struct allregs *regs)
 {
 	long error, tmp1, tmp2, tmp3, tmp4;
-	unsigned long pc = regs.pc - 4;
+	unsigned long pc = regs->pc - 4;
 	const struct exception_table_entry *fixup;
 
 	unaligned[0].count++;
@@ -636,7 +635,7 @@ got_exception:
 		printk("Forwarding unaligned exception at %lx (%lx)\n",
 		       pc, newpc);
 
-		(&regs)->pc = newpc;
+		regs->pc = newpc;
 		return;
 	}
 
@@ -650,7 +649,7 @@ got_exception:
 	       current->comm, current->pid);
 
 	printk("pc = [<%016lx>]  ra = [<%016lx>]  ps = %04lx\n",
-	       pc, una_reg(26), regs.ps);
+	       pc, una_reg(26), regs->ps);
 	printk("r0 = %016lx  r1 = %016lx  r2 = %016lx\n",
 	       una_reg(0), una_reg(1), una_reg(2));
 	printk("r3 = %016lx  r4 = %016lx  r5 = %016lx\n",
@@ -670,10 +669,10 @@ got_exception:
 	       una_reg(22), una_reg(23), una_reg(24));
 	printk("r25= %016lx  r27= %016lx  r28= %016lx\n",
 	       una_reg(25), una_reg(27), una_reg(28));
-	printk("gp = %016lx  sp = %p\n", regs.gp, &regs+1);
+	printk("gp = %016lx  sp = %p\n", regs->gp, regs+1);
 
 	dik_show_code((unsigned int *)pc);
-	dik_show_trace((unsigned long *)(&regs+1));
+	dik_show_trace((unsigned long *)(regs+1));
 
 	if (test_and_set_thread_flag (TIF_DIE_IF_KERNEL)) {
 		printk("die_if_kernel recursion detected.\n");