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- 31 Jul, 2012 10 commits
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Will Deacon authored
Rather than #define the options manually in the architecture code, add Kconfig options for them and select them there instead. This also allows us to select the compat IPC version parsing automatically for platforms using the old compat IPC interface. Reported-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Will Deacon <will.deacon@arm.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Will Deacon authored
If the SHMLBA definition for a native task differs from the definition for a compat task, the do_shmat() function would need to handle both. This patch introduces COMPAT_SHMLBA, which is used by the compat shmat syscall when calling the ipc code and allows architectures such as AArch64 (where the native SHMLBA is 64k but the compat (AArch32) definition is 16k) to provide the correct semantics for compat IPC system calls. Cc: David S. Miller <davem@davemloft.net> Cc: Chris Zankel <chris@zankel.net> Cc: Arnd Bergmann <arnd@arndb.de> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Yasuaki Ishimatsu authored
There are two ways to create /sys/firmware/memmap/X sysfs: - firmware_map_add_early When the system starts, it is calledd from e820_reserve_resources() - firmware_map_add_hotplug When the memory is hot plugged, it is called from add_memory() But these functions are called without unifying value of end argument as below: - end argument of firmware_map_add_early() : start + size - 1 - end argument of firmware_map_add_hogplug() : start + size The patch unifies them to "start + size". Even if applying the patch, /sys/firmware/memmap/X/end file content does not change. [akpm@linux-foundation.org: clarify comments] Signed-off-by: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com> Reviewed-by: Dave Hansen <dave@linux.vnet.ibm.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@kernel.org> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Tejun Heo <tj@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Catalin Marinas authored
Introduce CONFIG_ARCH_HAS_ATOMIC64_DEC_IF_POSITIVE and use this instead of the multitude of #if defined() checks in atomic64_test.c Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Joe Perches authored
Add #include <linux/kern_levels.h> so that the #define KERN_<LEVEL> macros don't have to be duplicated. Signed-off-by: Joe Perches <joe@perches.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Russell King <linux@arm.linux.org.uk> Cc: Kay Sievers <kay@vrfy.org> Acked-by: David Howells <dhowells@redhat.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Fengguang Wu authored
Fix the error arch/avr32/boards/atstk1000/atstk1002.c:100: error: 'num_partitions' undeclared here (not in a function) which was introduced by commit 1754aab9 ("mtd: ATMEL, AVR32: inline nand partition table access "). Signed-off-by: Fengguang Wu <fengguang.wu@intel.com> Cc: Dmitry Eremin-Solenikov <dbaryshkov@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Viresh Kumar authored
mach-netx had its own implementation of clk routines like, clk_get{put}, clk_enable{disable}, etc. And with introduction of following patchset: https://lkml.org/lkml/2012/4/24/154 we get compilation error for multiple definition of these routines. Sascha had following suggestion to deal with it: http://www.spinics.net/lists/arm-kernel/msg179369.html So, remove this code completely. Signed-off-by: Viresh Kumar <viresh.kumar2@arm.com> Reported-by: Paul Gortmaker <paul.gortmaker@gmail.com> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Kautuk Consul authored
Commits d065bd81 ("mm: retry page fault when blocking on disk transfer") and 37b23e05 ("x86,mm: make pagefault killable") introduced changes into the x86 pagefault handler for making the page fault handler retryable as well as killable. These changes reduce the mmap_sem hold time, which is crucial during OOM killer invocation. Port these changes to AVR32. [akpm@linux-foundation.org: fix comment layout] Signed-off-by: Mohd. Faris <mohdfarisq2010@gmail.com> Signed-off-by: Kautuk Consul <consul.kautuk@gmail.com> Acked-by: Havard Skinnemoen <hskinnemoen@gmail.com> Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Paul Bolle authored
There's a small group of odd looking includes in smc37c669.c. These includes appear to be if zero-ed out ever since they were added to the tree (in v2.1.89). Their purpose is unclear to me. Perhaps they were used in someones build system. Whatever their purpose was, nothing else uses something comparable. This entire if zero-ed out block might as well be removed. Signed-off-by: Paul Bolle <pebolle@tiscali.nl> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Matt Turner <mattst88@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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Kautuk Consul authored
Commits d065bd81 ("mm: retry page fault when blocking on disk transfer") and 37b23e05 ("x86,mm: make pagefault killable") introduced changes into the x86 pagefault handler for making the page fault handler retryable as well as killable. These changes reduce the mmap_sem hold time, which is crucial during OOM killer invocation. Port these changes to xtensa. Signed-off-by: Kautuk Consul <consul.kautuk@gmail.com> Acked-by: Chris Zankel <chris@zankel.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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- 30 Jul, 2012 11 commits
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Marek Szyprowski authored
This patch adds support for DMA_ATTR_SKIP_CPU_SYNC attribute for dma_(un)map_(single,page,sg) functions family. It lets dma mapping clients to create a mapping for the buffer for the given device without performing a CPU cache synchronization. CPU cache synchronization can be skipped for the buffers which it is known that they are already in 'device' domain (CPU caches have been already synchronized or there are only coherent mappings for the buffer). For advanced users only, please use it with care. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
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Marek Szyprowski authored
This patch adds support for dma_get_sgtable() function which is required to let drivers to share the buffers allocated by DMA-mapping subsystem. Generic implementation based on virt_to_page() is not suitable for ARM dma-mapping subsystem. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
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Marek Szyprowski authored
This patch adds support for DMA_ATTR_NO_KERNEL_MAPPING attribute for IOMMU allocations, what let drivers to save precious kernel virtual address space for large buffers that are intended to be accessed only from userspace. This patch is heavily based on initial work kindly provided by Abhinav Kochhar <abhinav.k@samsung.com>. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
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Marek Szyprowski authored
Commit 9adc5374 ('common: dma-mapping: introduce mmap method') added a generic method for implementing mmap user call to dma_map_ops structure. This patch converts ARM and PowerPC architectures (the only providers of dma_mmap_coherent/dma_mmap_writecombine calls) to use this generic dma_map_ops based call and adds a generic cross architecture definition for dma_mmap_attrs, dma_mmap_coherent, dma_mmap_writecombine functions. The generic mmap virt_to_page-based fallback implementation is provided for architectures which don't provide their own implementation for mmap method. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com>
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Marek Szyprowski authored
This patch fixes incorrect check in error path. When the allocation of first page fails, the kernel ops appears due to accessing -1 element of the pages array. Reported-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
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Marek Szyprowski authored
Add some sanity checks and forbid mmaping of buffers into vma areas larger than allocated dma buffer. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
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Marek Szyprowski authored
This patch changes dma-mapping subsystem to use generic vmalloc areas for all consistent dma allocations. This increases the total size limit of the consistent allocations and removes platform hacks and a lot of duplicated code. Atomic allocations are served from special pool preallocated on boot, because vmalloc areas cannot be reliably created in atomic context. Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com> Reviewed-by: Minchan Kim <minchan@kernel.org>
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Heiko Carstens authored
We use the user_mode() helper already at several places but also have the open coded variant at other places. Convert the code to always use the helper function. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Heiko Carstens authored
Fix name clash with user_mode() define which is also used in common code. Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Heiko Carstens authored
Make sure the kernel does not incorrectly create a SIGBUS signal during user space accesses: For user space accesses in the switched addressing mode case the kernel may walk page tables and access user address space via the kernel mapping. If a page table entry is invalid the function __handle_fault() gets called in order to emulate a page fault and trigger all the usual actions like paging in a missing page etc. by calling handle_mm_fault(). If handle_mm_fault() returns with an error fixup handling is necessary. For the switched addressing mode case all errors need to be mapped to -EFAULT, so that the calling uaccess function can return -EFAULT to user space. Unfortunately the __handle_fault() incorrectly calls do_sigbus() if VM_FAULT_SIGBUS is set. This however should only happen if a page fault was triggered by a user space instruction. For kernel mode uaccesses the correct action is to only return -EFAULT. So user space may incorrectly see SIGBUS signals because of this bug. For current machines this would only be possible for the switched addressing mode case in conjunction with futex operations. Cc: stable@vger.kernel.org Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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Heiko Carstens authored
This is the s390 variant of 37b23e05 "x86,mm: make pagefault killable". Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
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- 27 Jul, 2012 6 commits
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Steven Rostedt authored
As Colin Cross ported my x86 change to ARM, he also pointed out that powerpc is also behind in this fix. The commit 722b3c74 "ftrace/graph: Trace function entry before updating index" fixes an issue with function graph tracing for x86, where if the called entry function decides not to trace interrupts, it can fail the check if an interrupt comes in just after the curr_ret_stack is updated. The solution is to call the entry function first, then update the curr_ret_stack if the entry function wants to be traced. Cc: Colin Cross <ccross@android.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Anton Blanchard authored
Reduce the severity of the warning given when firmware flash is not supported. Not all platforms have it. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Anton Blanchard authored
Enable the hardware RNG and crypto modules. I verified they both autoload via the VIO subsystem, so there is no need to build them in. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Benjamin Herrenschmidt authored
This updates the g5 defconfig to include nouveau instead of nvidiafb (which works much better nowadays, in fact the latter crashes on modern distros), and to set CONFIG_VT_HW_CONSOLE_BINDING without which takeover from the firmware offb by nouveau doesn't work properly (and leads to unexplained black screens for some users). The rest is churn of going through defconfig / savedefconfig Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Alexander Graf authored
After merging the register type check patches from Ben's tree, the hv enabled booke implementation ceased to compile. This patch fixes things up so everyone's happy again. Signed-off-by: Alexander Graf <agraf@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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Stuart Yoder authored
Commit 9778b696 incorrectly changes the code setting the stack limit on entry to the kernel to mark the thread_info at the bottom of the stack out of bounds anymore. This fixes it. Signed-off-by: Stuart Yoder <stuart.yoder@freescale.com> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
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- 26 Jul, 2012 13 commits
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Tkhai Kirill authored
FPU state is saved into task_struct of created task. Current task continues use of the state, so it needs TIF_USEDFPU flag is not cleared. Created task receives fresh FPU and cleared TIF_USEFPU flag is required for it. Signed-off-by: Kirill Tkhai <tkhai@yandex.ru> Signed-off-by: David S. Miller <davem@davemloft.net>
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Sam Ravnborg authored
Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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Sam Ravnborg authored
Try to keep highmem support in a more central place. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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Sam Ravnborg authored
Only one user so move it to the file using it. It had nothing to do in fault_32. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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Sam Ravnborg authored
Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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Sam Ravnborg authored
Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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Sam Ravnborg authored
The quicklist stuff is not used anymore - drop it. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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Sam Ravnborg authored
We already check the model in head_32.S so no need to repeat the check here Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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Sam Ravnborg authored
The base is always the same so no need to use a variable for this. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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Sam Ravnborg authored
This function was only used to set of_pdt_build_more to leon_node_init(). But the leon_node_init() was a nop as prom_amba_init was never assigned. Cc: Daniel Hellstrom <daniel@gaisler.com> Cc: Konrad Eisele <konrad@gaisler.com> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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Sam Ravnborg authored
sparc32 does not support fixmaps - so do not pretend so by having the fixmap.h file. Move relevant parts to vaddrs.h. I looked at simplifying this even more but failed to understand the reasoning behind the extra guard page involved and due to missing testing possibilities only the trivial conversion was done. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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Sam Ravnborg authored
Remove all unused stuff from fixmap.h It is only used for highmem - sparc32 has no fixmap support. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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Sam Ravnborg authored
No users left of this function - drop it. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: David S. Miller <davem@davemloft.net>
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