Merge commit 'v2.6.27-rc6' into core/locking

Documentation/filesystems/Locking

@@ -144,8 +144,8 @@ prototypes:
 	void (*kill_sb) (struct super_block *);
 locking rules:
 		may block	BKL
-get_sb		yes		yes
-kill_sb		yes		yes
+get_sb		yes		no
+kill_sb		yes		no
 
 ->get_sb() returns error or 0 with locked superblock attached to the vfsmount
 (exclusive on ->s_umount).
@@ -409,12 +409,12 @@ ioctl:			yes	(see below)
 unlocked_ioctl:		no	(see below)
 compat_ioctl:		no
 mmap:			no
-open:			maybe	(see below)
+open:			no
 flush:			no
 release:		no
 fsync:			no	(see below)
 aio_fsync:		no
-fasync:			yes	(see below)
+fasync:			no
 lock:			yes
 readv:			no
 writev:			no
@@ -431,13 +431,6 @@ For many filesystems, it is probably safe to acquire the inode
 semaphore.  Note some filesystems (i.e. remote ones) provide no
 protection for i_size so you will need to use the BKL.
 
-->open() locking is in-transit: big lock partially moved into the methods.
-The only exception is ->open() in the instances of file_operations that never
-end up in ->i_fop/->proc_fops, i.e. ones that belong to character devices
-(chrdev_open() takes lock before replacing ->f_op and calling the secondary
-method. As soon as we fix the handling of module reference counters all
-instances of ->open() will be called without the BKL.
-
 Note: ext2_release() was *the* source of contention on fs-intensive
 loads and dropping BKL on ->release() helps to get rid of that (we still
 grab BKL for cases when we close a file that had been opened r/w, but that

Documentation/laptops/thinkpad-acpi.txt

@@ -44,7 +44,7 @@ detailed description):
 	- LCD brightness control
 	- Volume control
 	- Fan control and monitoring: fan speed, fan enable/disable
-	- Experimental: WAN enable and disable
+	- WAN enable and disable
 
 A compatibility table by model and feature is maintained on the web
 site, http://ibm-acpi.sf.net/. I appreciate any success or failure
@@ -1375,18 +1375,13 @@ with EINVAL, try to set pwm1_enable to 1 and pwm1 to at least 128 (255
 would be the safest choice, though).
 
 
-EXPERIMENTAL: WAN
------------------
+WAN
+---
 
 procfs: /proc/acpi/ibm/wan
 sysfs device attribute: wwan_enable (deprecated)
 sysfs rfkill class: switch "tpacpi_wwan_sw"
 
-This feature is marked EXPERIMENTAL because the implementation
-directly accesses hardware registers and may not work as expected. USE
-WITH CAUTION! To use this feature, you need to supply the
-experimental=1 parameter when loading the module.
-
 This feature shows the presence and current state of a W-WAN (Sierra
 Wireless EV-DO) device.
 

Documentation/video4linux/CARDLIST.au0828

@@ -3,3 +3,4 @@
   2 -> Hauppauge HVR850                         (au0828)        [2040:7240]
   3 -> DViCO FusionHDTV USB                     (au0828)        [0fe9:d620]
   4 -> Hauppauge HVR950Q rev xxF8               (au0828)        [2040:7201,2040:7211,2040:7281]
+  5 -> Hauppauge Woodbury                       (au0828)        [2040:8200]

Documentation/video4linux/gspca.txt

@@ -88,14 +88,14 @@ zc3xx		0471:0325	Philips SPC 200 NC
 zc3xx		0471:0326	Philips SPC 300 NC
 sonixj		0471:0327	Philips SPC 600 NC
 sonixj		0471:0328	Philips SPC 700 NC
-zc3xx		0471:032d	Philips spc210nc
-zc3xx		0471:032e	Philips spc315nc
-sonixj		0471:0330	Philips SPC 710NC
+zc3xx		0471:032d	Philips SPC 210 NC
+zc3xx		0471:032e	Philips SPC 315 NC
+sonixj		0471:0330	Philips SPC 710 NC
 spca501		0497:c001	Smile International
 sunplus		04a5:3003	Benq DC 1300
 sunplus		04a5:3008	Benq DC 1500
-sunplus		04a5:300a	Benq DC3410
-spca500		04a5:300c	Benq DC1016
+sunplus		04a5:300a	Benq DC 3410
+spca500		04a5:300c	Benq DC 1016
 sunplus		04f1:1001	JVC GC A50
 spca561		04fc:0561	Flexcam 100
 sunplus		04fc:500c	Sunplus CA500C
@@ -175,19 +175,21 @@ sunplus		08ca:2060	Aiptek PocketDV5300
 tv8532		0923:010f	ICM532 cams
 mars		093a:050f	Mars-Semi Pc-Camera
 pac207		093a:2460	PAC207 Qtec Webcam 100
-pac207		093a:2463	Philips spc200nc pac207
+pac207		093a:2463	Philips SPC 220 NC
 pac207		093a:2464	Labtec Webcam 1200
 pac207		093a:2468	PAC207
 pac207		093a:2470	Genius GF112
-pac207		093a:2471	PAC207 Genius VideoCam ge111
-pac207		093a:2472	PAC207 Genius VideoCam ge110
+pac207		093a:2471	Genius VideoCam ge111
+pac207		093a:2472	Genius VideoCam ge110
 pac7311		093a:2600	PAC7311 Typhoon
-pac7311		093a:2601	PAC7311 Phillips SPC610NC
+pac7311		093a:2601	Philips SPC 610 NC
 pac7311		093a:2603	PAC7312
-pac7311		093a:2608	PAC7311 Trust WB-3300p
-pac7311		093a:260e	PAC7311 Gigaware VGA PC Camera, Trust WB-3350p, SIGMA cam 2350
-pac7311		093a:260f	PAC7311 SnakeCam
+pac7311		093a:2608	Trust WB-3300p
+pac7311		093a:260e	Gigaware VGA PC Camera, Trust WB-3350p, SIGMA cam 2350
+pac7311		093a:260f	SnakeCam
 pac7311		093a:2621	PAC731x
+pac7311		093a:2624	PAC7302
+pac7311		093a:2626	Labtec 2200
 zc3xx		0ac8:0302	Z-star Vimicro zc0302
 vc032x		0ac8:0321	Vimicro generic vc0321
 vc032x		0ac8:0323	Vimicro Vc0323
@@ -220,6 +222,7 @@ sonixj		0c45:60c0	Sangha Sn535
 sonixj		0c45:60ec	SN9C105+MO4000
 sonixj		0c45:60fb	Surfer NoName
 sonixj		0c45:60fc	LG-LIC300
+sonixj		0c45:6128	Microdia/Sonix SNP325
 sonixj		0c45:612a	Avant Camera
 sonixj		0c45:612c	Typhoon Rasy Cam 1.3MPix
 sonixj		0c45:6130	Sonix Pccam
@@ -234,7 +237,7 @@ zc3xx		10fd:0128	Typhoon Webshot II USB 300k 0x0128
 spca561		10fd:7e50	FlyCam Usb 100
 zc3xx		10fd:8050	Typhoon Webshot II USB 300k
 spca501		1776:501c	Arowana 300K CMOS Camera
-t613		17a1:0128	T613/TAS5130A
+t613		17a1:0128	TASCORP JPEG Webcam, NGS Cyclops
 vc032x		17ef:4802	Lenovo Vc0323+MI1310_SOC
 pac207		2001:f115	D-Link DSB-C120
 spca500		2899:012c	Toptro Industrial

MAINTAINERS

@@ -222,8 +222,7 @@ W:	http://code.google.com/p/aceracpi
 S:	Maintained
 
 ACPI
-P:	Andi Kleen
-M:	ak@linux.intel.com
+P:	Len Brown
 M:	lenb@kernel.org
 L:	linux-acpi@vger.kernel.org
 W:	http://www.lesswatts.org/projects/acpi/
@@ -751,11 +750,13 @@ P:	Ville Syrjala
 M:	syrjala@sci.fi
 S:	Maintained
 
-ATL1 ETHERNET DRIVER
+ATLX ETHERNET DRIVERS
 P:	Jay Cliburn
 M:	jcliburn@gmail.com
 P:	Chris Snook
 M:	csnook@redhat.com
+P:	Jie Yang
+M:	jie.yang@atheros.com
 L:	atl1-devel@lists.sourceforge.net
 W:	http://sourceforge.net/projects/atl1
 W:	http://atl1.sourceforge.net
@@ -1594,7 +1595,7 @@ S:	Supported
 EMBEDDED LINUX
 P:	Paul Gortmaker
 M:	paul.gortmaker@windriver.com
-P	David Woodhouse
+P:	David Woodhouse
 M:	dwmw2@infradead.org
 L:	linux-embedded@vger.kernel.org
 S:	Maintained

Makefile

@@ -1,7 +1,7 @@
 VERSION = 2
 PATCHLEVEL = 6
 SUBLEVEL = 27
-EXTRAVERSION = -rc5
+EXTRAVERSION = -rc6
 NAME = Rotary Wombat
 
 # *DOCUMENTATION*

arch/arm/include/asm/byteorder.h

@@ -18,15 +18,7 @@
 #include <linux/compiler.h>
 #include <asm/types.h>
 
-#ifdef __ARMEB__
-# define __BIG_ENDIAN
-#else
-# define __LITTLE_ENDIAN
-#endif
-
-#define __SWAB_64_THRU_32__
-
-static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
+static inline __attribute_const__ __u32 ___arch__swab32(__u32 x)
 {
 	__u32 t;
 
@@ -48,8 +40,19 @@ static inline __attribute_const__ __u32 __arch_swab32(__u32 x)
 
 	return x;
 }
-#define __arch_swab32 __arch_swab32
 
-#include <linux/byteorder.h>
+#define __arch__swab32(x) ___arch__swab32(x)
+
+#if !defined(__STRICT_ANSI__) || defined(__KERNEL__)
+#  define __BYTEORDER_HAS_U64__
+#  define __SWAB_64_THRU_32__
+#endif
+
+#ifdef __ARMEB__
+#include <linux/byteorder/big_endian.h>
+#else
+#include <linux/byteorder/little_endian.h>
+#endif
 
 #endif
+

arch/arm/include/asm/io.h

@@ -61,8 +61,9 @@ extern void __raw_readsl(const void __iomem *addr, void *data, int longlen);
 #define MT_DEVICE_NONSHARED	1
 #define MT_DEVICE_CACHED	2
 #define MT_DEVICE_IXP2000	3
+#define MT_DEVICE_WC		4
 /*
- * types 4 onwards can be found in asm/mach/map.h and are undefined
+ * types 5 onwards can be found in asm/mach/map.h and are undefined
  * for ioremap
  */
 
@@ -215,11 +216,13 @@ extern void _memset_io(volatile void __iomem *, int, size_t);
 #define ioremap(cookie,size)		__arm_ioremap(cookie, size, MT_DEVICE)
 #define ioremap_nocache(cookie,size)	__arm_ioremap(cookie, size, MT_DEVICE)
 #define ioremap_cached(cookie,size)	__arm_ioremap(cookie, size, MT_DEVICE_CACHED)
+#define ioremap_wc(cookie,size)		__arm_ioremap(cookie, size, MT_DEVICE_WC)
 #define iounmap(cookie)			__iounmap(cookie)
 #else
 #define ioremap(cookie,size)		__arch_ioremap((cookie), (size), MT_DEVICE)
 #define ioremap_nocache(cookie,size)	__arch_ioremap((cookie), (size), MT_DEVICE)
 #define ioremap_cached(cookie,size)	__arch_ioremap((cookie), (size), MT_DEVICE_CACHED)
+#define ioremap_wc(cookie,size)		__arch_ioremap((cookie), (size), MT_DEVICE_WC)
 #define iounmap(cookie)			__arch_iounmap(cookie)
 #endif
 

arch/arm/include/asm/mach/map.h

@@ -18,13 +18,13 @@ struct map_desc {
 	unsigned int type;
 };
 
-/* types 0-3 are defined in asm/io.h */
-#define MT_CACHECLEAN		4
-#define MT_MINICLEAN		5
-#define MT_LOW_VECTORS		6
-#define MT_HIGH_VECTORS		7
-#define MT_MEMORY		8
-#define MT_ROM			9
+/* types 0-4 are defined in asm/io.h */
+#define MT_CACHECLEAN		5
+#define MT_MINICLEAN		6
+#define MT_LOW_VECTORS		7
+#define MT_HIGH_VECTORS		8
+#define MT_MEMORY		9
+#define MT_ROM			10
 
 #define MT_NONSHARED_DEVICE	MT_DEVICE_NONSHARED
 #define MT_IXP2000_DEVICE	MT_DEVICE_IXP2000

arch/arm/mach-omap1/mcbsp.c

@@ -159,6 +159,7 @@ static struct omap_mcbsp_ops omap1_mcbsp_ops = {
 #ifdef CONFIG_ARCH_OMAP730
 static struct omap_mcbsp_platform_data omap730_mcbsp_pdata[] = {
 	{
+		.phys_base	= OMAP730_MCBSP1_BASE,
 		.virt_base	= io_p2v(OMAP730_MCBSP1_BASE),
 		.dma_rx_sync	= OMAP_DMA_MCBSP1_RX,
 		.dma_tx_sync	= OMAP_DMA_MCBSP1_TX,
@@ -167,6 +168,7 @@ static struct omap_mcbsp_platform_data omap730_mcbsp_pdata[] = {
 		.ops		= &omap1_mcbsp_ops,
 	},
 	{
+		.phys_base	= OMAP730_MCBSP2_BASE,
 		.virt_base	= io_p2v(OMAP730_MCBSP2_BASE),
 		.dma_rx_sync	= OMAP_DMA_MCBSP3_RX,
 		.dma_tx_sync	= OMAP_DMA_MCBSP3_TX,
@@ -184,6 +186,7 @@ static struct omap_mcbsp_platform_data omap730_mcbsp_pdata[] = {
 #ifdef CONFIG_ARCH_OMAP15XX
 static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata[] = {
 	{
+		.phys_base	= OMAP1510_MCBSP1_BASE,
 		.virt_base	= OMAP1510_MCBSP1_BASE,
 		.dma_rx_sync	= OMAP_DMA_MCBSP1_RX,
 		.dma_tx_sync	= OMAP_DMA_MCBSP1_TX,
@@ -193,6 +196,7 @@ static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata[] = {
 		.clk_name	= "mcbsp_clk",
 		},
 	{
+		.phys_base	= OMAP1510_MCBSP2_BASE,
 		.virt_base	= io_p2v(OMAP1510_MCBSP2_BASE),
 		.dma_rx_sync	= OMAP_DMA_MCBSP2_RX,
 		.dma_tx_sync	= OMAP_DMA_MCBSP2_TX,
@@ -201,6 +205,7 @@ static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata[] = {
 		.ops		= &omap1_mcbsp_ops,
 	},
 	{
+		.phys_base	= OMAP1510_MCBSP3_BASE,
 		.virt_base	= OMAP1510_MCBSP3_BASE,
 		.dma_rx_sync	= OMAP_DMA_MCBSP3_RX,
 		.dma_tx_sync	= OMAP_DMA_MCBSP3_TX,
@@ -219,6 +224,7 @@ static struct omap_mcbsp_platform_data omap15xx_mcbsp_pdata[] = {
 #ifdef CONFIG_ARCH_OMAP16XX
 static struct omap_mcbsp_platform_data omap16xx_mcbsp_pdata[] = {
 	{
+		.phys_base	= OMAP1610_MCBSP1_BASE,
 		.virt_base	= OMAP1610_MCBSP1_BASE,
 		.dma_rx_sync	= OMAP_DMA_MCBSP1_RX,
 		.dma_tx_sync	= OMAP_DMA_MCBSP1_TX,
@@ -228,6 +234,7 @@ static struct omap_mcbsp_platform_data omap16xx_mcbsp_pdata[] = {
 		.clk_name	= "mcbsp_clk",
 	},
 	{
+		.phys_base	= OMAP1610_MCBSP2_BASE,
 		.virt_base	= io_p2v(OMAP1610_MCBSP2_BASE),
 		.dma_rx_sync	= OMAP_DMA_MCBSP2_RX,
 		.dma_tx_sync	= OMAP_DMA_MCBSP2_TX,
@@ -236,6 +243,7 @@ static struct omap_mcbsp_platform_data omap16xx_mcbsp_pdata[] = {
 		.ops		= &omap1_mcbsp_ops,
 	},
 	{
+		.phys_base	= OMAP1610_MCBSP3_BASE,
 		.virt_base	= OMAP1610_MCBSP3_BASE,
 		.dma_rx_sync	= OMAP_DMA_MCBSP3_RX,
 		.dma_tx_sync	= OMAP_DMA_MCBSP3_TX,

arch/arm/mach-omap2/mcbsp.c

@@ -134,6 +134,7 @@ static struct omap_mcbsp_ops omap2_mcbsp_ops = {
 #ifdef CONFIG_ARCH_OMAP24XX
 static struct omap_mcbsp_platform_data omap24xx_mcbsp_pdata[] = {
 	{
+		.phys_base	= OMAP24XX_MCBSP1_BASE,
 		.virt_base	= IO_ADDRESS(OMAP24XX_MCBSP1_BASE),
 		.dma_rx_sync	= OMAP24XX_DMA_MCBSP1_RX,
 		.dma_tx_sync	= OMAP24XX_DMA_MCBSP1_TX,
@@ -143,6 +144,7 @@ static struct omap_mcbsp_platform_data omap24xx_mcbsp_pdata[] = {
 		.clk_name	= "mcbsp_clk",
 	},
 	{
+		.phys_base	= OMAP24XX_MCBSP2_BASE,
 		.virt_base	= IO_ADDRESS(OMAP24XX_MCBSP2_BASE),
 		.dma_rx_sync	= OMAP24XX_DMA_MCBSP2_RX,
 		.dma_tx_sync	= OMAP24XX_DMA_MCBSP2_TX,
@@ -161,6 +163,7 @@ static struct omap_mcbsp_platform_data omap24xx_mcbsp_pdata[] = {
 #ifdef CONFIG_ARCH_OMAP34XX
 static struct omap_mcbsp_platform_data omap34xx_mcbsp_pdata[] = {
 	{
+		.phys_base	= OMAP34XX_MCBSP1_BASE,
 		.virt_base	= IO_ADDRESS(OMAP34XX_MCBSP1_BASE),
 		.dma_rx_sync	= OMAP24XX_DMA_MCBSP1_RX,
 		.dma_tx_sync	= OMAP24XX_DMA_MCBSP1_TX,
@@ -170,6 +173,7 @@ static struct omap_mcbsp_platform_data omap34xx_mcbsp_pdata[] = {
 		.clk_name	= "mcbsp_clk",
 	},
 	{
+		.phys_base	= OMAP34XX_MCBSP2_BASE,
 		.virt_base	= IO_ADDRESS(OMAP34XX_MCBSP2_BASE),
 		.dma_rx_sync	= OMAP24XX_DMA_MCBSP2_RX,
 		.dma_tx_sync	= OMAP24XX_DMA_MCBSP2_TX,

arch/arm/mm/mmu.c

@@ -211,6 +211,12 @@ static struct mem_type mem_types[] = {
 				  PMD_SECT_TEX(1),
 		.domain		= DOMAIN_IO,
 	},
+	[MT_DEVICE_WC] = {	/* ioremap_wc */
+		.prot_pte	= PROT_PTE_DEVICE,
+		.prot_l1	= PMD_TYPE_TABLE,
+		.prot_sect	= PROT_SECT_DEVICE,
+		.domain		= DOMAIN_IO,
+	},
 	[MT_CACHECLEAN] = {
 		.prot_sect = PMD_TYPE_SECT | PMD_SECT_XN,
 		.domain    = DOMAIN_KERNEL,
@@ -272,6 +278,20 @@ static void __init build_mem_type_table(void)
 		ecc_mask = 0;
 	}
 
+	/*
+	 * On non-Xscale3 ARMv5-and-older systems, use CB=01
+	 * (Uncached/Buffered) for ioremap_wc() mappings.  On XScale3
+	 * and ARMv6+, use TEXCB=00100 mappings (Inner/Outer Uncacheable
+	 * in xsc3 parlance, Uncached Normal in ARMv6 parlance).
+	 */
+	if (cpu_is_xsc3() || cpu_arch >= CPU_ARCH_ARMv6) {
+		mem_types[MT_DEVICE_WC].prot_pte_ext |= PTE_EXT_TEX(1);
+		mem_types[MT_DEVICE_WC].prot_sect |= PMD_SECT_TEX(1);
+	} else {
+		mem_types[MT_DEVICE_WC].prot_pte |= L_PTE_BUFFERABLE;
+		mem_types[MT_DEVICE_WC].prot_sect |= PMD_SECT_BUFFERABLE;
+	}
+
 	/*
 	 * ARMv5 and lower, bit 4 must be set for page tables.
 	 * (was: cache "update-able on write" bit on ARM610)

arch/arm/plat-mxc/clock.c

@@ -37,7 +37,6 @@
 #include <linux/proc_fs.h>
 #include <linux/semaphore.h>
 #include <linux/string.h>
-#include <linux/version.h>
 
 #include <mach/clock.h>
 

arch/arm/plat-omap/gpio.c

@@ -1488,7 +1488,7 @@ static int __init _omap_gpio_init(void)
 		bank->chip.set = gpio_set;
 		if (bank_is_mpuio(bank)) {
 			bank->chip.label = "mpuio";
-#ifdef CONFIG_ARCH_OMAP1
+#ifdef CONFIG_ARCH_OMAP16XX
 			bank->chip.dev = &omap_mpuio_device.dev;
 #endif
 			bank->chip.base = OMAP_MPUIO(0);

arch/arm/plat-omap/include/mach/mcbsp.h

@@ -315,6 +315,7 @@ struct omap_mcbsp_ops {
 };
 
 struct omap_mcbsp_platform_data {
+	unsigned long phys_base;
 	u32 virt_base;
 	u8 dma_rx_sync, dma_tx_sync;
 	u16 rx_irq, tx_irq;
@@ -324,6 +325,7 @@ struct omap_mcbsp_platform_data {
 
 struct omap_mcbsp {
 	struct device *dev;
+	unsigned long phys_base;
 	u32 io_base;
 	u8 id;
 	u8 free;

arch/arm/plat-omap/mcbsp.c

@@ -651,7 +651,7 @@ int omap_mcbsp_xmit_buffer(unsigned int id, dma_addr_t buffer,
 	omap_set_dma_dest_params(mcbsp[id].dma_tx_lch,
 				 src_port,
 				 OMAP_DMA_AMODE_CONSTANT,
-				 mcbsp[id].io_base + OMAP_MCBSP_REG_DXR1,
+				 mcbsp[id].phys_base + OMAP_MCBSP_REG_DXR1,
 				 0, 0);
 
 	omap_set_dma_src_params(mcbsp[id].dma_tx_lch,
@@ -712,7 +712,7 @@ int omap_mcbsp_recv_buffer(unsigned int id, dma_addr_t buffer,
 	omap_set_dma_src_params(mcbsp[id].dma_rx_lch,
 				src_port,
 				OMAP_DMA_AMODE_CONSTANT,
-				mcbsp[id].io_base + OMAP_MCBSP_REG_DRR1,
+				mcbsp[id].phys_base + OMAP_MCBSP_REG_DRR1,
 				0, 0);
 
 	omap_set_dma_dest_params(mcbsp[id].dma_rx_lch,
@@ -830,6 +830,7 @@ static int __init omap_mcbsp_probe(struct platform_device *pdev)
 	mcbsp[id].dma_tx_lch = -1;
 	mcbsp[id].dma_rx_lch = -1;
 
+	mcbsp[id].phys_base = pdata->phys_base;
 	mcbsp[id].io_base = pdata->virt_base;
 	/* Default I/O is IRQ based */
 	mcbsp[id].io_type = OMAP_MCBSP_IRQ_IO;

arch/avr32/kernel/asm-offsets.c

@@ -4,6 +4,8 @@
  * to extract and format the required data.
  */
 
+#include <linux/mm.h>
+#include <linux/sched.h>
 #include <linux/thread_info.h>
 #include <linux/kbuild.h>
 
@@ -17,4 +19,8 @@ void foo(void)
 	OFFSET(TI_rar_saved, thread_info, rar_saved);
 	OFFSET(TI_rsr_saved, thread_info, rsr_saved);
 	OFFSET(TI_restart_block, thread_info, restart_block);
+	BLANK();
+	OFFSET(TSK_active_mm, task_struct, active_mm);
+	BLANK();
+	OFFSET(MM_pgd, mm_struct, pgd);
 }

arch/avr32/kernel/entry-avr32b.S

@@ -334,9 +334,64 @@ save_full_context_ex:
 
 	/* Low-level exception handlers */
 handle_critical:
+	/*
+	 * AT32AP700x errata:
+	 *
+	 * After a Java stack overflow or underflow trap, any CPU
+	 * memory access may cause erratic behavior. This will happen
+	 * when the four least significant bits of the JOSP system
+	 * register contains any value between 9 and 15 (inclusive).
+	 *
+	 * Possible workarounds:
+	 *   - Don't use the Java Extension Module
+	 *   - Ensure that the stack overflow and underflow trap
+	 *     handlers do not do any memory access or trigger any
+	 *     exceptions before the overflow/underflow condition is
+	 *     cleared (by incrementing or decrementing the JOSP)
+	 *   - Make sure that JOSP does not contain any problematic
+	 *     value before doing any exception or interrupt
+	 *     processing.
+	 *   - Set up a critical exception handler which writes a
+	 *     known-to-be-safe value, e.g. 4, to JOSP before doing
+	 *     any further processing.
+	 *
+	 * We'll use the last workaround for now since we cannot
+	 * guarantee that user space processes don't use Java mode.
+	 * Non-well-behaving userland will be terminated with extreme
+	 * prejudice.
+	 */
+#ifdef CONFIG_CPU_AT32AP700X
+	/*
+	 * There's a chance we can't touch memory, so temporarily
+	 * borrow PTBR to save the stack pointer while we fix things
+	 * up...
+	 */
+	mtsr	SYSREG_PTBR, sp
+	mov	sp, 4
+	mtsr	SYSREG_JOSP, sp
+	mfsr	sp, SYSREG_PTBR
+	sub	pc, -2
+
+	/* Push most of pt_regs on stack. We'll do the rest later */
 	sub	sp, 4
-	stmts	--sp, r0-lr
-	rcall	save_full_context_ex
+	pushm	r0-r12
+
+	/* PTBR mirrors current_thread_info()->task->active_mm->pgd */
+	get_thread_info r0
+	ld.w	r1, r0[TI_task]
+	ld.w	r2, r1[TSK_active_mm]
+	ld.w	r3, r2[MM_pgd]
+	mtsr	SYSREG_PTBR, r3
+#else
+	sub	sp, 4
+	pushm	r0-r12
+#endif
+	sub	r0, sp, -(14 * 4)
+	mov	r1, lr
+	mfsr	r2, SYSREG_RAR_EX
+	mfsr	r3, SYSREG_RSR_EX
+	pushm	r0-r3
+
 	mfsr	r12, SYSREG_ECR
 	mov	r11, sp
 	rcall	do_critical_exception

arch/avr32/mach-at32ap/pm-at32ap700x.S

@@ -134,7 +134,7 @@ pm_standby:
 	mov	r11, SDRAMC_LPR_LPCB_SELF_RFR
 	bfins	r10, r11, 0, 2		/* LPCB <- self Refresh */
 	sync	0			/* flush write buffer */
-	st.w	r12[SDRAMC_LPR], r11	/* put SDRAM in self-refresh mode */
+	st.w	r12[SDRAMC_LPR], r10	/* put SDRAM in self-refresh mode */
 	ld.w	r11, r12[SDRAMC_LPR]
 	unmask_interrupts
 	sleep	CPU_SLEEP_FROZEN

arch/ia64/include/asm/sections.h

@@ -21,5 +21,8 @@ extern char __start_gate_brl_fsys_bubble_down_patchlist[], __end_gate_brl_fsys_b
 extern char __start_unwind[], __end_unwind[];
 extern char __start_ivt_text[], __end_ivt_text[];
 
+#undef dereference_function_descriptor
+void *dereference_function_descriptor(void *);
+
 #endif /* _ASM_IA64_SECTIONS_H */