From 08ebb250ef9473112273f780a777b4624a38856f Mon Sep 17 00:00:00 2001 From: Bartlomiej Zolnierkiewicz Date: Mon, 30 Sep 2013 15:09:20 +0200 Subject: MIPS: Alchemy: MTX-1: fix incorrect placement of __initdata tag __initdata tag should be placed between the variable name and equal sign for the variable to be placed in the intended .init.data section. Signed-off-by: Bartlomiej Zolnierkiewicz Signed-off-by: Kyungmin Park Cc: linux-mips@linux-mips.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/5934/ Signed-off-by: Ralf Baechle --- arch/mips/alchemy/board-mtx1.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/mips') diff --git a/arch/mips/alchemy/board-mtx1.c b/arch/mips/alchemy/board-mtx1.c index 4a9baa9f6330..9969dbab19e3 100644 --- a/arch/mips/alchemy/board-mtx1.c +++ b/arch/mips/alchemy/board-mtx1.c @@ -276,7 +276,7 @@ static struct platform_device mtx1_pci_host = { .resource = alchemy_pci_host_res, }; -static struct __initdata platform_device * mtx1_devs[] = { +static struct platform_device *mtx1_devs[] __initdata = { &mtx1_pci_host, &mtx1_gpio_leds, &mtx1_wdt, -- cgit v1.2.3 From 5596b0b245fb9d2cefb5023b11061050351c1398 Mon Sep 17 00:00:00 2001 From: Yoichi Yuasa Date: Wed, 2 Oct 2013 15:03:03 +0900 Subject: MIPS: Fix forgotten preempt_enable() when CPU has inclusive pcaches [ 1.904000] BUG: scheduling while atomic: swapper/1/0x00000002 [ 1.908000] Modules linked in: [ 1.916000] CPU: 0 PID: 1 Comm: swapper Not tainted 3.12.0-rc2-lemote-los.git-5318619-dirty #1 [ 1.920000] Stack : 0000000031aac000 ffffffff810d0000 0000000000000052 ffffffff802730a4 0000000000000000 0000000000000001 ffffffff810cdf90 ffffffff810d0000 ffffffff8068b968 ffffffff806f5537 ffffffff810cdf90 980000009f0782e8 0000000000000001 ffffffff80720000 ffffffff806b0000 980000009f078000 980000009f290000 ffffffff805f312c 980000009f05b5d8 ffffffff80233518 980000009f05b5e8 ffffffff80274b7c 980000009f078000 ffffffff8068b968 0000000000000000 0000000000000000 0000000000000000 0000000000000000 0000000000000000 980000009f05b520 0000000000000000 ffffffff805f2f6c 0000000000000000 ffffffff80700000 ffffffff80700000 ffffffff806fc758 ffffffff80700000 ffffffff8020be98 ffffffff806fceb0 ffffffff805f2f6c ... [ 2.028000] Call Trace: [ 2.032000] [] show_stack+0x80/0x98 [ 2.036000] [] __schedule_bug+0x44/0x6c [ 2.040000] [] __schedule+0x518/0x5b0 [ 2.044000] [] schedule_timeout+0x128/0x1f0 [ 2.048000] [] msleep+0x3c/0x60 [ 2.052000] [] do_probe+0x238/0x3a8 [ 2.056000] [] ide_probe_port+0x340/0x7e8 [ 2.060000] [] ide_host_register+0x2d0/0x7a8 [ 2.064000] [] ide_pci_init_two+0x4e4/0x790 [ 2.068000] [] amd74xx_probe+0x148/0x2c8 [ 2.072000] [] pci_device_probe+0xc4/0x130 [ 2.076000] [] driver_probe_device+0x98/0x270 [ 2.080000] [] __driver_attach+0xe0/0xe8 [ 2.084000] [] bus_for_each_dev+0x78/0xe0 [ 2.088000] [] bus_add_driver+0x230/0x310 [ 2.092000] [] driver_register+0x84/0x158 [ 2.096000] [] do_one_initcall+0x104/0x160 Signed-off-by: Yoichi Yuasa Reported-by: Aaro Koskinen Tested-by: Aaro Koskinen Cc: linux-mips@linux-mips.org Cc: Linux Kernel Mailing List Patchwork: https://patchwork.linux-mips.org/patch/5941/ Signed-off-by: Ralf Baechle --- arch/mips/mm/c-r4k.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 'arch/mips') diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c index 627883bc6d5f..bc6f96fcb529 100644 --- a/arch/mips/mm/c-r4k.c +++ b/arch/mips/mm/c-r4k.c @@ -609,6 +609,7 @@ static void r4k_dma_cache_wback_inv(unsigned long addr, unsigned long size) r4k_blast_scache(); else blast_scache_range(addr, addr + size); + preempt_enable(); __sync(); return; } @@ -650,6 +651,7 @@ static void r4k_dma_cache_inv(unsigned long addr, unsigned long size) */ blast_inv_scache_range(addr, addr + size); } + preempt_enable(); __sync(); return; } -- cgit v1.2.3 From 8b3c569a3999a8fd5a819f892525ab5520777c92 Mon Sep 17 00:00:00 2001 From: James Hogan Date: Mon, 7 Oct 2013 12:14:26 +0100 Subject: MIPS: stack protector: Fix per-task canary switch Commit 1400eb6 (MIPS: r4k,octeon,r2300: stack protector: change canary per task) was merged in v3.11 and introduced assembly in the MIPS resume functions to update the value of the current canary in __stack_chk_guard. However it used PTR_L resulting in a load of the canary value, instead of PTR_LA to construct its address. The value is intended to be random but is then treated as an address in the subsequent LONG_S (store). This was observed to cause a fault and panic: CPU 0 Unable to handle kernel paging request at virtual address 139fea20, epc == 8000cc0c, ra == 8034f2a4 Oops[#1]: ... $24 : 139fea20 1e1f7cb6 ... Call Trace: [<8000cc0c>] resume+0xac/0x118 [<8034f2a4>] __schedule+0x5f8/0x78c [<8034f4e0>] schedule_preempt_disabled+0x20/0x2c [<80348eec>] rest_init+0x74/0x84 [<804dc990>] start_kernel+0x43c/0x454 Code: 3c18804b 8f184030 8cb901f8 00c0e021 8cb002f0 8cb102f4 8cb202f8 8cb302fc This can also be forced by modifying arch/mips/include/asm/stackprotector.h so that the default __stack_chk_guard value is more likely to be a bad (or unaligned) pointer. Fix it to use PTR_LA instead, to load the address of the canary value, which the LONG_S can then use to write into it. Reported-by: bobjones (via #mipslinux on IRC) Signed-off-by: James Hogan Cc: Ralf Baechle Cc: Gregory Fong Cc: linux-mips@linux-mips.org Cc: stable@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/6026/ Signed-off-by: Ralf Baechle --- arch/mips/kernel/octeon_switch.S | 2 +- arch/mips/kernel/r2300_switch.S | 2 +- arch/mips/kernel/r4k_switch.S | 2 +- 3 files changed, 3 insertions(+), 3 deletions(-) (limited to 'arch/mips') diff --git a/arch/mips/kernel/octeon_switch.S b/arch/mips/kernel/octeon_switch.S index 4204d76af854..029e002a4ea0 100644 --- a/arch/mips/kernel/octeon_switch.S +++ b/arch/mips/kernel/octeon_switch.S @@ -73,7 +73,7 @@ 3: #if defined(CONFIG_CC_STACKPROTECTOR) && !defined(CONFIG_SMP) - PTR_L t8, __stack_chk_guard + PTR_LA t8, __stack_chk_guard LONG_L t9, TASK_STACK_CANARY(a1) LONG_S t9, 0(t8) #endif diff --git a/arch/mips/kernel/r2300_switch.S b/arch/mips/kernel/r2300_switch.S index 38af83f84c4a..20b7b040e76f 100644 --- a/arch/mips/kernel/r2300_switch.S +++ b/arch/mips/kernel/r2300_switch.S @@ -67,7 +67,7 @@ LEAF(resume) 1: #if defined(CONFIG_CC_STACKPROTECTOR) && !defined(CONFIG_SMP) - PTR_L t8, __stack_chk_guard + PTR_LA t8, __stack_chk_guard LONG_L t9, TASK_STACK_CANARY(a1) LONG_S t9, 0(t8) #endif diff --git a/arch/mips/kernel/r4k_switch.S b/arch/mips/kernel/r4k_switch.S index 921238a6bd26..078de5eaca8f 100644 --- a/arch/mips/kernel/r4k_switch.S +++ b/arch/mips/kernel/r4k_switch.S @@ -69,7 +69,7 @@ 1: #if defined(CONFIG_CC_STACKPROTECTOR) && !defined(CONFIG_SMP) - PTR_L t8, __stack_chk_guard + PTR_LA t8, __stack_chk_guard LONG_L t9, TASK_STACK_CANARY(a1) LONG_S t9, 0(t8) #endif -- cgit v1.2.3 From 3f0116c3238a96bc18ad4b4acefe4e7be32fa861 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Thu, 10 Oct 2013 10:16:30 +0200 Subject: compiler/gcc4: Add quirk for 'asm goto' miscompilation bug Fengguang Wu, Oleg Nesterov and Peter Zijlstra tracked down a kernel crash to a GCC bug: GCC miscompiles certain 'asm goto' constructs, as outlined here: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58670 Implement a workaround suggested by Jakub Jelinek. Reported-and-tested-by: Fengguang Wu Reported-by: Oleg Nesterov Reported-by: Peter Zijlstra Suggested-by: Jakub Jelinek Reviewed-by: Richard Henderson Cc: Linus Torvalds Cc: Andrew Morton Cc: Signed-off-by: Ingo Molnar --- arch/mips/include/asm/jump_label.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/mips') diff --git a/arch/mips/include/asm/jump_label.h b/arch/mips/include/asm/jump_label.h index 4d6d77ed9b9d..e194f957ca8c 100644 --- a/arch/mips/include/asm/jump_label.h +++ b/arch/mips/include/asm/jump_label.h @@ -22,7 +22,7 @@ static __always_inline bool arch_static_branch(struct static_key *key) { - asm goto("1:\tnop\n\t" + asm_volatile_goto("1:\tnop\n\t" "nop\n\t" ".pushsection __jump_table, \"aw\"\n\t" WORD_INSN " 1b, %l[l_yes], %0\n\t" -- cgit v1.2.3 From 0c02c8007ea5554d028f99fd3e29fc201fdeeab3 Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Thu, 19 Sep 2013 11:22:36 -0500 Subject: of/irq: Rename of_irq_map_* functions to of_irq_parse_* The OF irq handling code has been overloading the term 'map' to refer to both parsing the data in the device tree and mapping it to the internal linux irq system. This is probably because the device tree does have the concept of an 'interrupt-map' function for translating interrupt references from one node to another, but 'map' is still confusing when the primary purpose of some of the functions are to parse the DT data. This patch renames all the of_irq_map_* functions to of_irq_parse_* which makes it clear that there is a difference between the parsing phase and the mapping phase. Kernel code can make use of just the parsing or just the mapping support as needed by the subsystem. The patch was generated mechanically with a handful of sed commands. Signed-off-by: Grant Likely Acked-by: Michal Simek Acked-by: Tony Lindgren Cc: Ralf Baechle Cc: Benjamin Herrenschmidt --- arch/mips/pci/fixup-lantiq.c | 2 +- arch/mips/pci/pci-rt3883.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'arch/mips') diff --git a/arch/mips/pci/fixup-lantiq.c b/arch/mips/pci/fixup-lantiq.c index 6c829df28dc7..2e8dbfedae53 100644 --- a/arch/mips/pci/fixup-lantiq.c +++ b/arch/mips/pci/fixup-lantiq.c @@ -28,7 +28,7 @@ int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) struct of_irq dev_irq; int irq; - if (of_irq_map_pci(dev, &dev_irq)) { + if (of_irq_parse_pci(dev, &dev_irq)) { dev_err(&dev->dev, "trying to map irq for unknown slot:%d pin:%d\n", slot, pin); return 0; diff --git a/arch/mips/pci/pci-rt3883.c b/arch/mips/pci/pci-rt3883.c index 95c9d41382e7..cae92a05ee70 100644 --- a/arch/mips/pci/pci-rt3883.c +++ b/arch/mips/pci/pci-rt3883.c @@ -587,7 +587,7 @@ int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) int err; int irq; - err = of_irq_map_pci(dev, &dev_irq); + err = of_irq_parse_pci(dev, &dev_irq); if (err) { pr_err("pci %s: unable to get irq map, err=%d\n", pci_name((struct pci_dev *) dev), err); -- cgit v1.2.3 From 530210c7814e83564c7ca7bca8192515042c0b63 Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Sun, 15 Sep 2013 16:39:11 +0100 Subject: of/irq: Replace of_irq with of_phandle_args struct of_irq and struct of_phandle_args are exactly the same structure. This patch makes the kernel use of_phandle_args everywhere. This in itself isn't a big deal, but it makes some follow-on patches simpler. Signed-off-by: Grant Likely Acked-by: Michal Simek Acked-by: Tony Lindgren Cc: Russell King Cc: Ralf Baechle Cc: Benjamin Herrenschmidt --- arch/mips/pci/fixup-lantiq.c | 5 ++--- arch/mips/pci/pci-rt3883.c | 6 ++---- 2 files changed, 4 insertions(+), 7 deletions(-) (limited to 'arch/mips') diff --git a/arch/mips/pci/fixup-lantiq.c b/arch/mips/pci/fixup-lantiq.c index 2e8dbfedae53..81ff0b5e6efa 100644 --- a/arch/mips/pci/fixup-lantiq.c +++ b/arch/mips/pci/fixup-lantiq.c @@ -25,7 +25,7 @@ int pcibios_plat_dev_init(struct pci_dev *dev) int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) { - struct of_irq dev_irq; + struct of_phandle_args dev_irq; int irq; if (of_irq_parse_pci(dev, &dev_irq)) { @@ -33,8 +33,7 @@ int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) slot, pin); return 0; } - irq = irq_create_of_mapping(dev_irq.controller, dev_irq.specifier, - dev_irq.size); + irq = irq_create_of_mapping(dev_irq.np, dev_irq.args, dev_irq.args_count); dev_info(&dev->dev, "SLOT:%d PIN:%d IRQ:%d\n", slot, pin, irq); return irq; } diff --git a/arch/mips/pci/pci-rt3883.c b/arch/mips/pci/pci-rt3883.c index cae92a05ee70..0f08a5ba0b2a 100644 --- a/arch/mips/pci/pci-rt3883.c +++ b/arch/mips/pci/pci-rt3883.c @@ -583,7 +583,7 @@ err_put_intc_node: int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) { - struct of_irq dev_irq; + struct of_phandle_args dev_irq; int err; int irq; @@ -594,9 +594,7 @@ int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) return 0; } - irq = irq_create_of_mapping(dev_irq.controller, - dev_irq.specifier, - dev_irq.size); + irq = irq_create_of_mapping(dev_irq.np, dev_irq.args, dev_irq.args_count); if (irq == 0) pr_crit("pci %s: no irq found for pin %u\n", -- cgit v1.2.3 From e6d30ab1e7d1281784672c0fc2ffa385cfb7279e Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Sun, 15 Sep 2013 16:55:53 +0100 Subject: of/irq: simplify args to irq_create_of_mapping All the callers of irq_create_of_mapping() pass the contents of a struct of_phandle_args structure to the function. Since all the callers already have an of_phandle_args pointer, why not pass it directly to irq_create_of_mapping()? Signed-off-by: Grant Likely Acked-by: Michal Simek Acked-by: Tony Lindgren Cc: Thomas Gleixner Cc: Russell King Cc: Ralf Baechle Cc: Benjamin Herrenschmidt --- arch/mips/pci/fixup-lantiq.c | 2 +- arch/mips/pci/pci-rt3883.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'arch/mips') diff --git a/arch/mips/pci/fixup-lantiq.c b/arch/mips/pci/fixup-lantiq.c index 81ff0b5e6efa..aef60e75003e 100644 --- a/arch/mips/pci/fixup-lantiq.c +++ b/arch/mips/pci/fixup-lantiq.c @@ -33,7 +33,7 @@ int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) slot, pin); return 0; } - irq = irq_create_of_mapping(dev_irq.np, dev_irq.args, dev_irq.args_count); + irq = irq_create_of_mapping(&dev_irq); dev_info(&dev->dev, "SLOT:%d PIN:%d IRQ:%d\n", slot, pin, irq); return irq; } diff --git a/arch/mips/pci/pci-rt3883.c b/arch/mips/pci/pci-rt3883.c index 0f08a5ba0b2a..eadc4310cd36 100644 --- a/arch/mips/pci/pci-rt3883.c +++ b/arch/mips/pci/pci-rt3883.c @@ -594,7 +594,7 @@ int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) return 0; } - irq = irq_create_of_mapping(dev_irq.np, dev_irq.args, dev_irq.args_count); + irq = irq_create_of_mapping(&dev_irq); if (irq == 0) pr_crit("pci %s: no irq found for pin %u\n", -- cgit v1.2.3 From 16b84e5a505c790538e534ad8dfda9c288691e40 Mon Sep 17 00:00:00 2001 From: Grant Likely Date: Thu, 19 Sep 2013 16:44:55 -0500 Subject: of/irq: Create of_irq_parse_and_map_pci() to consolidate arch code. Several architectures open code effectively the same code block for finding and mapping PCI irqs. This patch consolidates it down to a single function. Signed-off-by: Grant Likely Acked-by: Michal Simek Cc: Russell King Cc: Ralf Baechle Cc: Benjamin Herrenschmidt --- arch/mips/pci/fixup-lantiq.c | 12 +----------- arch/mips/pci/pci-rt3883.c | 22 +--------------------- 2 files changed, 2 insertions(+), 32 deletions(-) (limited to 'arch/mips') diff --git a/arch/mips/pci/fixup-lantiq.c b/arch/mips/pci/fixup-lantiq.c index aef60e75003e..c2ce41ea61d7 100644 --- a/arch/mips/pci/fixup-lantiq.c +++ b/arch/mips/pci/fixup-lantiq.c @@ -25,15 +25,5 @@ int pcibios_plat_dev_init(struct pci_dev *dev) int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) { - struct of_phandle_args dev_irq; - int irq; - - if (of_irq_parse_pci(dev, &dev_irq)) { - dev_err(&dev->dev, "trying to map irq for unknown slot:%d pin:%d\n", - slot, pin); - return 0; - } - irq = irq_create_of_mapping(&dev_irq); - dev_info(&dev->dev, "SLOT:%d PIN:%d IRQ:%d\n", slot, pin, irq); - return irq; + return of_irq_parse_and_map_pci(dev, slot, pin); } diff --git a/arch/mips/pci/pci-rt3883.c b/arch/mips/pci/pci-rt3883.c index eadc4310cd36..adeff2bfe4cd 100644 --- a/arch/mips/pci/pci-rt3883.c +++ b/arch/mips/pci/pci-rt3883.c @@ -583,27 +583,7 @@ err_put_intc_node: int __init pcibios_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) { - struct of_phandle_args dev_irq; - int err; - int irq; - - err = of_irq_parse_pci(dev, &dev_irq); - if (err) { - pr_err("pci %s: unable to get irq map, err=%d\n", - pci_name((struct pci_dev *) dev), err); - return 0; - } - - irq = irq_create_of_mapping(&dev_irq); - - if (irq == 0) - pr_crit("pci %s: no irq found for pin %u\n", - pci_name((struct pci_dev *) dev), pin); - else - pr_info("pci %s: using irq %d for pin %u\n", - pci_name((struct pci_dev *) dev), irq, pin); - - return irq; + return of_irq_parse_and_map_pci(dev, slot, pin); } int pcibios_plat_dev_init(struct pci_dev *dev) -- cgit v1.2.3