Merge branch 'linux-2.6' into powerpc-next

Documentation/cgroups.txt

@@ -310,8 +310,8 @@ and then start a subshell 'sh' in that cgroup:
   cd /dev/cgroup
   mkdir Charlie
   cd Charlie
-  /bin/echo 2-3 > cpus
-  /bin/echo 1 > mems
+  /bin/echo 2-3 > cpuset.cpus
+  /bin/echo 1 > cpuset.mems
   /bin/echo $$ > tasks
   sh
   # The subshell 'sh' is now running in cgroup Charlie

Documentation/feature-removal-schedule.txt

@@ -289,6 +289,14 @@ Who:	Glauber Costa <gcosta@redhat.com>
 
 ---------------------------
 
+What:	old style serial driver for ColdFire (CONFIG_SERIAL_COLDFIRE)
+When:	2.6.28
+Why:	This driver still uses the old interface and has been replaced
+	by CONFIG_SERIAL_MCF.
+Who:	Sebastian Siewior <sebastian@breakpoint.cc>
+
+---------------------------
+
 What:	/sys/o2cb symlink
 When:	January 2010
 Why:	/sys/fs/o2cb is the proper location for this information - /sys/o2cb

Documentation/hwmon/adt7473

@@ -69,7 +69,8 @@ point2: Set the pwm speed at a higher temperature bound.
 
 The ADT7473 will scale the pwm between the lower and higher pwm speed when
 the temperature is between the two temperature boundaries.  PWM values range
-from 0 (off) to 255 (full speed).
+from 0 (off) to 255 (full speed).  Fan speed will be set to maximum when the
+temperature sensor associated with the PWM control exceeds temp#_max.
 
 Notes
 -----

Documentation/kernel-parameters.txt

@@ -398,9 +398,6 @@ and is between 256 and 4096 characters. It is defined in the file
 	cio_ignore=	[S390]
 			See Documentation/s390/CommonIO for details.
 
-	cio_msg=	[S390]
-			See Documentation/s390/CommonIO for details.
-
 	clock=		[BUGS=X86-32, HW] gettimeofday clocksource override.
 			[Deprecated]
 			Forces specified clocksource (if available) to be used
@@ -689,6 +686,12 @@ and is between 256 and 4096 characters. It is defined in the file
 	floppy=		[HW]
 			See Documentation/floppy.txt.
 
+	force_pal_cache_flush
+			[IA-64] Avoid check_sal_cache_flush which may hang on
+			buggy SAL_CACHE_FLUSH implementations. Using this
+			parameter will force ia64_sal_cache_flush to call
+			ia64_pal_cache_flush instead of SAL_CACHE_FLUSH.
+
 	gamecon.map[2|3]=
 			[HW,JOY] Multisystem joystick and NES/SNES/PSX pad
 			support via parallel port (up to 5 devices per port)

Documentation/memory-barriers.txt

@@ -994,7 +994,17 @@ The Linux kernel has eight basic CPU memory barriers:
 	DATA DEPENDENCY	read_barrier_depends()	smp_read_barrier_depends()
 
 
-All CPU memory barriers unconditionally imply compiler barriers.
+All memory barriers except the data dependency barriers imply a compiler
+barrier. Data dependencies do not impose any additional compiler ordering.
+
+Aside: In the case of data dependencies, the compiler would be expected to
+issue the loads in the correct order (eg. `a[b]` would have to load the value
+of b before loading a[b]), however there is no guarantee in the C specification
+that the compiler may not speculate the value of b (eg. is equal to 1) and load
+a before b (eg. tmp = a[1]; if (b != 1) tmp = a[b]; ). There is also the
+problem of a compiler reloading b after having loaded a[b], thus having a newer
+copy of b than a[b]. A consensus has not yet been reached about these problems,
+however the ACCESS_ONCE macro is a good place to start looking.
 
 SMP memory barriers are reduced to compiler barriers on uniprocessor compiled
 systems because it is assumed that a CPU will appear to be self-consistent,

Documentation/video4linux/CARDLIST.cx23885

@@ -5,6 +5,6 @@
   4 -> DViCO FusionHDTV5 Express                           [18ac:d500]
   5 -> Hauppauge WinTV-HVR1500Q                            [0070:7790,0070:7797]
   6 -> Hauppauge WinTV-HVR1500                             [0070:7710,0070:7717]
-  7 -> Hauppauge WinTV-HVR1200                             [0070:71d1]
+  7 -> Hauppauge WinTV-HVR1200                             [0070:71d1,0070:71d3]
   8 -> Hauppauge WinTV-HVR1700                             [0070:8101]
   9 -> Hauppauge WinTV-HVR1400                             [0070:8010]

Documentation/video4linux/CARDLIST.em28xx

@@ -14,4 +14,4 @@
  13 -> Terratec Prodigy XS                      (em2880)        [0ccd:0047]
  14 -> Pixelview Prolink PlayTV USB 2.0         (em2820/em2840)
  15 -> V-Gear PocketTV                          (em2800)
- 16 -> Hauppauge WinTV HVR 950                  (em2880)        [2040:6513]
+ 16 -> Hauppauge WinTV HVR 950                  (em2880)        [2040:6513,2040:6517,2040:651b,2040:651f]

MAINTAINERS

@@ -367,12 +367,12 @@ S:	Maintained for 2.4; PCI support for 2.6.
 AMD GEODE CS5536 USB DEVICE CONTROLLER DRIVER
 P:	Thomas Dahlmann
 M:	thomas.dahlmann@amd.com
-L:	info-linux@geode.amd.com	(subscribers-only)
+L:	linux-geode@lists.infradead.org (moderated for non-subscribers)
 S:	Supported
 
 AMD GEODE PROCESSOR/CHIPSET SUPPORT
 P:	Jordan Crouse
-L:	info-linux@geode.amd.com	(subscribers-only)
+L:	linux-geode@lists.infradead.org (moderated for non-subscribers)
 W:	http://www.amd.com/us-en/ConnectivitySolutions/TechnicalResources/0,,50_2334_2452_11363,00.html
 S:	Supported
 
@@ -1230,6 +1230,15 @@ P:	Jaya Kumar
 M:	jayakumar.alsa@gmail.com
 S:	Maintained
 
+CX18 VIDEO4LINUX DRIVER
+P:	Hans Verkuil, Andy Walls
+M:	hverkuil@xs4all.nl, awalls@radix.net
+L:	ivtv-devel@ivtvdriver.org
+L:	ivtv-users@ivtvdriver.org
+L:	video4linux-list@redhat.com
+W:	http://linuxtv.org
+S:	Maintained
+
 CYBERPRO FB DRIVER
 P:	Russell King
 M:	rmk@arm.linux.org.uk

arch/arm/mach-at91/at91sam9261_devices.c

@@ -544,10 +544,10 @@ void __init at91_add_device_lcdc(struct atmel_lcdfb_info *data)
 		struct resource *fb_res = &lcdc_resources[2];
 		size_t fb_len = fb_res->end - fb_res->start + 1;
 
-		fb = ioremap_writecombine(fb_res->start, fb_len);
+		fb = ioremap(fb_res->start, fb_len);
 		if (fb) {
 			memset(fb, 0, fb_len);
-			iounmap(fb, fb_len);
+			iounmap(fb);
 		}
 	}
 	lcdc_data = *data;

arch/arm/mach-at91/at91sam9rl_devices.c

@@ -332,13 +332,6 @@ static struct resource lcdc_resources[] = {
 		.end	= AT91SAM9RL_ID_LCDC,
 		.flags	= IORESOURCE_IRQ,
 	},
-#if defined(CONFIG_FB_INTSRAM)
-	[2] = {
-		.start	= AT91SAM9RL_SRAM_BASE,
-		.end	= AT91SAM9RL_SRAM_BASE + AT91SAM9RL_SRAM_SIZE - 1,
-		.flags	= IORESOURCE_MEM,
-	},
-#endif
 };
 
 static struct platform_device at91_lcdc_device = {
@@ -381,20 +374,6 @@ void __init at91_add_device_lcdc(struct atmel_lcdfb_info *data)
 	at91_set_B_periph(AT91_PIN_PC24, 0);	/* LCDD22 */
 	at91_set_B_periph(AT91_PIN_PC25, 0);	/* LCDD23 */
 
-#ifdef CONFIG_FB_INTSRAM
-	{
-		void __iomem *fb;
-		struct resource *fb_res = &lcdc_resources[2];
-		size_t fb_len = fb_res->end - fb_res->start + 1;
-
-		fb = ioremap_writecombine(fb_res->start, fb_len);
-		if (fb) {
-			memset(fb, 0, fb_len);
-			iounmap(fb, fb_len);
-		}
-	}
-#endif
-
 	lcdc_data = *data;
 	platform_device_register(&at91_lcdc_device);
 }

arch/ia64/Kconfig

@@ -135,6 +135,7 @@ config IA64_GENERIC
 	  HP-zx1/sx1000		For HP systems
 	  HP-zx1/sx1000+swiotlb	For HP systems with (broken) DMA-constrained devices.
 	  SGI-SN2		For SGI Altix systems
+	  SGI-UV		For SGI UV systems
 	  Ski-simulator		For the HP simulator <http://www.hpl.hp.com/research/linux/ski/>
 
 	  If you don't know what to do, choose "generic".
@@ -170,6 +171,18 @@ config IA64_SGI_SN2
 	  to select this option.  If in doubt, select ia64 generic support
 	  instead.
 
+config IA64_SGI_UV`
+	bool "SGI-UV`"
+	select NUMA
+	select ACPI_NUMA
+	select SWIOTLB
+	help
+	  Selecting this option will optimize the kernel for use on UV based
+	  systems, but the resulting kernel binary will not run on other
+	  types of ia64 systems.  If you have an SGI UV system, it's safe
+	  to select this option.  If in doubt, select ia64 generic support
+	  instead.
+
 config IA64_HP_SIM
 	bool "Ski-simulator"
 	select SWIOTLB

arch/ia64/Makefile

@@ -63,7 +63,7 @@ drivers-$(CONFIG_PCI)		+= arch/ia64/pci/
 drivers-$(CONFIG_IA64_HP_SIM)	+= arch/ia64/hp/sim/
 drivers-$(CONFIG_IA64_HP_ZX1)	+= arch/ia64/hp/common/ arch/ia64/hp/zx1/
 drivers-$(CONFIG_IA64_HP_ZX1_SWIOTLB) += arch/ia64/hp/common/ arch/ia64/hp/zx1/
-drivers-$(CONFIG_IA64_GENERIC)	+= arch/ia64/hp/common/ arch/ia64/hp/zx1/ arch/ia64/hp/sim/ arch/ia64/sn/
+drivers-$(CONFIG_IA64_GENERIC)	+= arch/ia64/hp/common/ arch/ia64/hp/zx1/ arch/ia64/hp/sim/ arch/ia64/sn/ arch/ia64/uv/
 drivers-$(CONFIG_OPROFILE)	+= arch/ia64/oprofile/
 
 boot := arch/ia64/hp/sim/boot

arch/ia64/ia32/ia32_support.c

@@ -15,7 +15,6 @@
 #include <linux/kernel.h>
 #include <linux/init.h>
 #include <linux/mm.h>
-#include <linux/personality.h>
 #include <linux/sched.h>
 
 #include <asm/intrinsics.h>
@@ -29,7 +28,6 @@
 
 extern int die_if_kernel (char *str, struct pt_regs *regs, long err);
 
-struct exec_domain ia32_exec_domain;
 struct page *ia32_shared_page[NR_CPUS];
 unsigned long *ia32_boot_gdt;
 unsigned long *cpu_gdt_table[NR_CPUS];
@@ -240,14 +238,6 @@ ia32_cpu_init (void)
 static int __init
 ia32_init (void)
 {
-	ia32_exec_domain.name = "Linux/x86";
-	ia32_exec_domain.handler = NULL;
-	ia32_exec_domain.pers_low = PER_LINUX32;
-	ia32_exec_domain.pers_high = PER_LINUX32;
-	ia32_exec_domain.signal_map = default_exec_domain.signal_map;
-	ia32_exec_domain.signal_invmap = default_exec_domain.signal_invmap;
-	register_exec_domain(&ia32_exec_domain);
-
 #if PAGE_SHIFT > IA32_PAGE_SHIFT
 	{
 		extern struct kmem_cache *ia64_partial_page_cachep;

arch/ia64/kernel/acpi.c

@@ -117,7 +117,10 @@ acpi_get_sysname(void)
 	if (!strcmp(hdr->oem_id, "HP")) {
 		return "hpzx1";
 	} else if (!strcmp(hdr->oem_id, "SGI")) {
-		return "sn2";
+		if (!strcmp(hdr->oem_table_id + 4, "UV"))
+			return "uv";
+		else
+			return "sn2";
 	}
 
 	return "dig";
@@ -130,6 +133,8 @@ acpi_get_sysname(void)
 	return "hpzx1_swiotlb";
 # elif defined (CONFIG_IA64_SGI_SN2)
 	return "sn2";
+# elif defined (CONFIG_IA64_SGI_UV)
+	return "uv";
 # elif defined (CONFIG_IA64_DIG)
 	return "dig";
 # else
@@ -622,6 +627,9 @@ void acpi_unregister_gsi(u32 gsi)
 	if (acpi_irq_model == ACPI_IRQ_MODEL_PLATFORM)
 		return;
 
+	if (has_8259 && gsi < 16)
+		return;
+
 	iosapic_unregister_intr(gsi);
 }
 

arch/ia64/kernel/entry.S

@@ -1156,6 +1156,9 @@ skip_rbs_switch:
 	 *	r31 = current->thread_info->flags
 	 * On exit:
 	 *	p6 = TRUE if work-pending-check needs to be redone
+	 *
+	 * Interrupts are disabled on entry, reenabled depend on work, and
+	 * disabled on exit.
 	 */
 .work_pending_syscall:
 	add r2=-8,r2
@@ -1164,16 +1167,16 @@ skip_rbs_switch:
 	st8 [r2]=r8
 	st8 [r3]=r10
 .work_pending:
-	tbit.z p6,p0=r31,TIF_NEED_RESCHED		// current_thread_info()->need_resched==0?
+	tbit.z p6,p0=r31,TIF_NEED_RESCHED	// is resched not needed?
 (p6)	br.cond.sptk.few .notify
 #ifdef CONFIG_PREEMPT
 (pKStk) dep r21=-1,r0,PREEMPT_ACTIVE_BIT,1
 	;;
 (pKStk) st4 [r20]=r21
-	ssm psr.i		// enable interrupts
 #endif
+	ssm psr.i		// enable interrupts
 	br.call.spnt.many rp=schedule
-.ret9:	cmp.eq p6,p0=r0,r0				// p6 <- 1
+.ret9:	cmp.eq p6,p0=r0,r0	// p6 <- 1 (re-check)
 	rsm psr.i		// disable interrupts
 	;;
 #ifdef CONFIG_PREEMPT
@@ -1182,13 +1185,13 @@ skip_rbs_switch:
 (pKStk)	st4 [r20]=r0		// preempt_count() <- 0
 #endif
 (pLvSys)br.cond.sptk.few  .work_pending_syscall_end
-	br.cond.sptk.many .work_processed_kernel	// re-check
+	br.cond.sptk.many .work_processed_kernel
 
 .notify:
 (pUStk)	br.call.spnt.many rp=notify_resume_user
-.ret10:	cmp.ne p6,p0=r0,r0				// p6 <- 0
+.ret10:	cmp.ne p6,p0=r0,r0	// p6 <- 0 (don't re-check)
 (pLvSys)br.cond.sptk.few  .work_pending_syscall_end
-	br.cond.sptk.many .work_processed_kernel	// don't re-check
+	br.cond.sptk.many .work_processed_kernel
 
 .work_pending_syscall_end:
 	adds r2=PT(R8)+16,r12
@@ -1196,7 +1199,7 @@ skip_rbs_switch:
 	;;
 	ld8 r8=[r2]
 	ld8 r10=[r3]
-	br.cond.sptk.many .work_processed_syscall	// re-check
+	br.cond.sptk.many .work_processed_syscall
 
 END(ia64_leave_kernel)
 
@@ -1234,9 +1237,12 @@ GLOBAL_ENTRY(ia64_invoke_schedule_tail)
 END(ia64_invoke_schedule_tail)
 
 	/*
-	 * Setup stack and call do_notify_resume_user().  Note that pSys and pNonSys need to
-	 * be set up by the caller.  We declare 8 input registers so the system call
-	 * args get preserved, in case we need to restart a system call.
+	 * Setup stack and call do_notify_resume_user(), keeping interrupts
+	 * disabled.
+	 *
+	 * Note that pSys and pNonSys need to be set up by the caller.
+	 * We declare 8 input registers so the system call args get preserved,
+	 * in case we need to restart a system call.
 	 */
 ENTRY(notify_resume_user)
 	.prologue ASM_UNW_PRLG_RP|ASM_UNW_PRLG_PFS, ASM_UNW_PRLG_GRSAVE(8)

arch/ia64/kernel/palinfo.c

@@ -900,12 +900,6 @@ static void
 palinfo_smp_call(void *info)
 {
 	palinfo_smp_data_t *data = (palinfo_smp_data_t *)info;
-	if (data == NULL) {
-		printk(KERN_ERR "palinfo: data pointer is NULL\n");
-		data->ret = 0; /* no output */
-		return;
-	}
-	/* does this actual call */
 	data->ret = (*data->func)(data->page);
 }
 

arch/ia64/kernel/perfmon.c

@@ -5013,12 +5013,13 @@ pfm_context_force_terminate(pfm_context_t *ctx, struct pt_regs *regs)
 }
 
 static int pfm_ovfl_notify_user(pfm_context_t *ctx, unsigned long ovfl_pmds);
+
  /*
   * pfm_handle_work() can be called with interrupts enabled
   * (TIF_NEED_RESCHED) or disabled. The down_interruptible
   * call may sleep, therefore we must re-enable interrupts
   * to avoid deadlocks. It is safe to do so because this function
-  * is called ONLY when returning to user level (PUStk=1), in which case
+  * is called ONLY when returning to user level (pUStk=1), in which case
   * there is no risk of kernel stack overflow due to deep
   * interrupt nesting.
   */
@@ -5034,7 +5035,8 @@ pfm_handle_work(void)
 
 	ctx = PFM_GET_CTX(current);
 	if (ctx == NULL) {
-		printk(KERN_ERR "perfmon: [%d] has no PFM context\n", task_pid_nr(current));
+		printk(KERN_ERR "perfmon: [%d] has no PFM context\n",
+			task_pid_nr(current));
 		return;
 	}
 
@@ -5058,11 +5060,12 @@ pfm_handle_work(void)
 	/*
 	 * must be done before we check for simple-reset mode
 	 */
-	if (ctx->ctx_fl_going_zombie || ctx->ctx_state == PFM_CTX_ZOMBIE) goto do_zombie;
-
+	if (ctx->ctx_fl_going_zombie || ctx->ctx_state == PFM_CTX_ZOMBIE)
+		goto do_zombie;
 
 	//if (CTX_OVFL_NOBLOCK(ctx)) goto skip_blocking;
-	if (reason == PFM_TRAP_REASON_RESET) goto skip_blocking;
+	if (reason == PFM_TRAP_REASON_RESET)
+		goto skip_blocking;
 
 	/*
 	 * restore interrupt mask to what it was on entry.
@@ -5110,7 +5113,8 @@ do_zombie:
 	/*
 	 * in case of interruption of down() we don't restart anything
 	 */
-	if (ret < 0) goto nothing_to_do;
+	if (ret < 0)
+		goto nothing_to_do;
 
 skip_blocking:
 	pfm_resume_after_ovfl(ctx, ovfl_regs, regs);

arch/ia64/kernel/process.c

@@ -167,11 +167,18 @@ void tsk_clear_notify_resume(struct task_struct *tsk)
 	clear_ti_thread_flag(task_thread_info(tsk), TIF_NOTIFY_RESUME);
 }
 
+/*
+ * do_notify_resume_user():
+ *	Called from notify_resume_user at entry.S, with interrupts disabled.
+ */
 void
-do_notify_resume_user (sigset_t *unused, struct sigscratch *scr, long in_syscall)
+do_notify_resume_user(sigset_t *unused, struct sigscratch *scr, long in_syscall)
 {
 	if (fsys_mode(current, &scr->pt)) {
-		/* defer signal-handling etc. until we return to privilege-level 0.  */
+		/*
+		 * defer signal-handling etc. until we return to
+		 * privilege-level 0.
+		 */
 		if (!ia64_psr(&scr->pt)->lp)
 			ia64_psr(&scr->pt)->lp = 1;
 		return;
@@ -179,16 +186,26 @@ do_notify_resume_user (sigset_t *unused, struct sigscratch *scr, long in_syscall
 
 #ifdef CONFIG_PERFMON
 	if (current->thread.pfm_needs_checking)
+		/*
+		 * Note: pfm_handle_work() allow us to call it with interrupts
+		 * disabled, and may enable interrupts within the function.
+		 */
 		pfm_handle_work();
 #endif
 
 	/* deal with pending signal delivery */
-	if (test_thread_flag(TIF_SIGPENDING))
+	if (test_thread_flag(TIF_SIGPENDING)) {
+		local_irq_enable();	/* force interrupt enable */
 		ia64_do_signal(scr, in_syscall);
+	}
 
 	/* copy user rbs to kernel rbs */
-	if (unlikely(test_thread_flag(TIF_RESTORE_RSE)))
+	if (unlikely(test_thread_flag(TIF_RESTORE_RSE))) {
+		local_irq_enable();	/* force interrupt enable */
 		ia64_sync_krbs();
+	}
+
+	local_irq_disable();	/* force interrupt disable */
 }
 
 static int pal_halt        = 1;

arch/ia64/kernel/sal.c

@@ -229,6 +229,14 @@ static void __init sal_desc_ap_wakeup(void *p) { }
  */
 static int sal_cache_flush_drops_interrupts;
 
+static int __init
+force_pal_cache_flush(char *str)
+{
+	sal_cache_flush_drops_interrupts = 1;
+	return 0;
+}
+early_param("force_pal_cache_flush", force_pal_cache_flush);
+
 void __init
 check_sal_cache_flush (void)
 {
@@ -237,6 +245,9 @@ check_sal_cache_flush (void)
 	u64 vector, cache_type = 3;
 	struct ia64_sal_retval isrv;
 
+	if (sal_cache_flush_drops_interrupts)
+		return;
+
 	cpu = get_cpu();
 	local_irq_save(flags);
 

arch/ia64/kernel/setup.c

@@ -239,6 +239,25 @@ __initcall(register_memory);
 
 
 #ifdef CONFIG_KEXEC
+
+/*
+ * This function checks if the reserved crashkernel is allowed on the specific
+ * IA64 machine flavour. Machines without an IO TLB use swiotlb and require
+ * some memory below 4 GB (i.e. in 32 bit area), see the implementation of
+ * lib/swiotlb.c. The hpzx1 architecture has an IO TLB but cannot use that
+ * in kdump case. See the comment in sba_init() in sba_iommu.c.
+ *
+ * So, the only machvec that really supports loading the kdump kernel
+ * over 4 GB is "sn2".
+ */
+static int __init check_crashkernel_memory(unsigned long pbase, size_t size)
+{
+	if (ia64_platform_is("sn2") || ia64_platform_is("uv"))
+		return 1;
+	else
+		return pbase < (1UL << 32);
+}
+
 static void __init setup_crashkernel(unsigned long total, int *n)
 {
 	unsigned long long base = 0, size = 0;
@@ -252,6 +271,16 @@ static void __init setup_crashkernel(unsigned long total, int *n)
 			base = kdump_find_rsvd_region(size,
 					rsvd_region, *n);
 		}
+
+		if (!check_crashkernel_memory(base, size)) {
+			pr_warning("crashkernel: There would be kdump memory "
+				"at %ld GB but this is unusable because it "
+				"must\nbe below 4 GB. Change the memory "
+				"configuration of the machine.\n",
+				(unsigned long)(base >> 30));
+			return;
+		}
+
 		if (base != ~0UL) {
 			printk(KERN_INFO "Reserving %ldMB of memory at %ldMB "
 					"for crashkernel (System RAM: %ldMB)\n",