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2012-10-12vfs: define struct filename and have getname() return itJeff Layton
getname() is intended to copy pathname strings from userspace into a kernel buffer. The result is just a string in kernel space. It would however be quite helpful to be able to attach some ancillary info to the string. For instance, we could attach some audit-related info to reduce the amount of audit-related processing needed. When auditing is enabled, we could also call getname() on the string more than once and not need to recopy it from userspace. This patchset converts the getname()/putname() interfaces to return a struct instead of a string. For now, the struct just tracks the string in kernel space and the original userland pointer for it. Later, we'll add other information to the struct as it becomes convenient. Signed-off-by: Jeff Layton <jlayton@redhat.com> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-10-12Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal Pull pile 2 of execve and kernel_thread unification work from Al Viro: "Stuff in there: kernel_thread/kernel_execve/sys_execve conversions for several more architectures plus assorted signal fixes and cleanups. There'll be more (in particular, real fixes for the alpha do_notify_resume() irq mess)..." * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: (43 commits) alpha: don't open-code trace_report_syscall_{enter,exit} Uninclude linux/freezer.h m32r: trim masks avr32: trim masks tile: don't bother with SIGTRAP in setup_frame microblaze: don't bother with SIGTRAP in setup_rt_frame() mn10300: don't bother with SIGTRAP in setup_frame() frv: no need to raise SIGTRAP in setup_frame() x86: get rid of duplicate code in case of CONFIG_VM86 unicore32: remove pointless test h8300: trim _TIF_WORK_MASK parisc: decide whether to go to slow path (tracesys) based on thread flags parisc: don't bother looping in do_signal() parisc: fix double restarts bury the rest of TIF_IRET sanitize tsk_is_polling() bury _TIF_RESTORE_SIGMASK unicore32: unobfuscate _TIF_WORK_MASK mips: NOTIFY_RESUME is not needed in TIF masks mips: merge the identical "return from syscall" per-ABI code ... Conflicts: arch/arm/include/asm/thread_info.h
2012-10-08Blackfin: fix wrong place disabled irqSteven Miao
Shouldn't disable irq before send ipi. Signed-off-by: Steven Miao <realmz6@gmail.com> Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-10-08Blackfin: bfin_gpio: proc: fix return valueSteven Miao
Signed-off-by: Steven Miao <realmz6@gmail.com> Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-10-01Uninclude linux/freezer.hRichard Weinberger
This include is no longer needed. (seems to be a leftover from try_to_freeze()) Signed-off-by: Richard Weinberger <richard@nod.at> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-08-03Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k Pull m68k updates from Geert Uytterhoeven. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k: m68k: Make sys_atomic_cmpxchg_32 work on classic m68k m68k/apollo: Rename "timer" to "apollo_timer" zorro: Remove unused zorro_bus.devices m68k: Remove never used asm/shm.h m68k/sun3: Remove unselectable code in prom_init() m68k: Use asm-generic version of <asm/sections.h> m68k: Replace m68k-specific _[se]bss by generic __bss_{start,stop} mtd/uclinux: Use generic __bss_stop instead of _ebss m68knommu: Allow ColdFire CPUs to use unaligned accesses m68k: Remove five unused headers m68k: CPU32 does not support unaligned accesses m68k: Introduce config option CPU_HAS_NO_UNALIGNED m68k: delay, muldi3 - Use CONFIG_CPU_HAS_NO_MULDIV64 m68k: Move CPU_HAS_* config options m68k: Remove duplicate FPU config option m68knommu: Clean up printing of sections m68k: Use asm-generic version of <asm/types.h> m68k: Use Kbuild logic to import asm-generic headers
2012-07-30Merge branch 'for-3.6' of git://gitorious.org/linux-pwm/linux-pwmLinus Torvalds
Pull PWM subsystem from Thierry Reding: "The new PWM subsystem aims at collecting all implementations of the legacy PWM API and to eventually replace it completely. The subsystem has been in development for over half a year now and many drivers have already been converted. It has been in linux-next for a couple of weeks and there have been no major issues so I think it is ready for inclusion in your tree." Arnd Bergmann <arnd@arndb.de>: "Very much Ack on the new subsystem. It uses the interface declarations as the previously separate pwm drivers, so nothing changes for now in the drivers using it, although it enables us to change those more easily in the future if we want to. This work is also one of the missing pieces that are required to eventually build ARM kernels for multiple platforms, which is currently prohibited (amongs other things) by the fact that you cannot have more than one driver exporting the pwm functions." Tested-and-acked-by: Alexandre Courbot <acourbot@nvidia.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Philip, Avinash <avinashphilip@ti.com> # TI's AM33xx platforms Acked-By: Alexandre Pereira da Silva <aletes.xgr@gmail.com> # LPC32XX Acked-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Sachin Kamat <sachin.kamat@linaro.org> Fix up trivial conflicts with other cleanups and DT updates. * 'for-3.6' of git://gitorious.org/linux-pwm/linux-pwm: (36 commits) pwm: pwm-tiehrpwm: PWM driver support for EHRPWM pwm: pwm-tiecap: PWM driver support for ECAP APWM pwm: fix used-uninitialized warning in pwm_get() pwm: add lpc32xx PWM support pwm_backlight: pass correct brightness to callback pwm: Use pr_* functions in pwm-samsung.c file pwm: Convert pwm-samsung to use devm_* APIs pwm: Convert pwm-tegra to use devm_clk_get() pwm: pwm-mxs: Return proper error if pwmchip_remove() fails pwm: pwm-bfin: Return proper error if pwmchip_remove() fails pwm: pxa: Propagate pwmchip_remove() error pwm: Convert pwm-pxa to use devm_* APIs pwm: Convert pwm-vt8500 to use devm_* APIs pwm: Convert pwm-imx to use devm_* APIs pwm: Conflict with legacy PWM API pwm: pwm-mxs: add pinctrl support pwm: pwm-mxs: use devm_* managed functions pwm: pwm-mxs: use global reset function stmp_reset_block pwm: pwm-mxs: encode soc name in compatible string pwm: Take over maintainership of the PWM subsystem ...
2012-07-24blackfin: cplb-nompu: fix ROM cplb size for bf609-ezkitBob Liu
In user xip test, there is a cplb error when ROMKERNEL try to mount romfs using 'mount -t romfs /dev/mtdblock2 /mnt', becasue the CPLB setting is not correct. Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-07-24bfin-dma: only use MDMA3 on bf609Steven Miao
Signed-off-by: Steven Miao <realmz6@gmail.com> Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-07-24blackfin: Call sg_for_each to pass through the whole sg list.Sonic Zhang
Otherwise, chained sg list may be missed. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-07-02pwm: Move Blackfin PWM driver to PWM frameworkThierry Reding
This commit moves the Blackfin PWM driver to the drivers/pwm sub- directory and converts it to register with the new PWM framework. Signed-off-by: Thierry Reding <thierry.reding@avionic-design.de>
2012-06-27mtd/uclinux: Use generic __bss_stop instead of _ebssGeert Uytterhoeven
The standard (see BSS_SECTION() in <asm-generic/vmlinux.lds.h> and <asm-generic/sections.h>) symbol for the end of BSS is __bss_stop. This allows to remove all local declarations that have been added to several architectures just to please CONFIG_MTD_UCLINUX. Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Paul Mundt <lethal@linux-sh.org> Acked-by: Mike Frysinger <vapier@gentoo.org> Acked-by: Michal Simek <monstr@monstr.eu> Acked-by: Greg Ungerer <gerg@uclinux.org>
2012-06-05Merge branch 'sched-urgent-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull scheduler fixes from Ingo Molnar. * 'sched-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: sched: Remove NULL assignment of dattr_cur sched: Remove the last NULL entry from sched_feat_names sched: Make sched_feat_names const sched/rt: Fix SCHED_RR across cgroups sched: Move nr_cpus_allowed out of 'struct sched_rt_entity' sched: Make sure to not re-read variables after validation sched: Fix SD_OVERLAP sched: Don't try allocating memory from offline nodes sched/nohz: Fix rq->cpu_load calculations some more sched/x86: Use cpu_llc_shared_mask(cpu) for coregroup_mask
2012-06-01blackfin: check __get_user() return valueAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-06-01new helper: signal_delivered()Al Viro
Does block_sigmask() + tracehook_signal_handler(); called when sigframe has been successfully built. All architectures converted to it; block_sigmask() itself is gone now (merged into this one). I'm still not too happy with the signature, but that's a separate story (IMO we need a structure that would contain signal number + siginfo + k_sigaction, so that get_signal_to_deliver() would fill one, signal_delivered(), handle_signal() and probably setup...frame() - take one). Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-06-01most of set_current_blocked() callers want SIGKILL/SIGSTOP removed from setAl Viro
Only 3 out of 63 do not. Renamed the current variant to __set_current_blocked(), added set_current_blocked() that will exclude unblockable signals, switched open-coded instances to it. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-06-01TIF_RESTORE_SIGMASK can be set only when TIF_SIGPENDING is setAl Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-06-01don't call try_to_freeze() from do_signal()Al Viro
get_signal_to_deliver() will handle it itself Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-06-01pull clearing RESTORE_SIGMASK into block_sigmask()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-06-01new helper: sigmask_to_save()Al Viro
replace boilerplate "should we use ->saved_sigmask or ->blocked?" with calls of obvious inlined helper... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-06-01new helper: restore_saved_sigmask()Al Viro
first fruits of ..._restore_sigmask() helpers: now we can take boilerplate "signal didn't have a handler, clear RESTORE_SIGMASK and restore the blocked mask from ->saved_mask" into a common helper. Open-coded instances switched... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-31Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal Pull second pile of signal handling patches from Al Viro: "This one is just task_work_add() series + remaining prereqs for it. There probably will be another pull request from that tree this cycle - at least for helpers, to get them out of the way for per-arch fixes remaining in the tree." Fix trivial conflict in kernel/irq/manage.c: the merge of Andrew's pile had brought in commit 97fd75b7b8e0 ("kernel/irq/manage.c: use the pr_foo() infrastructure to prefix printks") which changed one of the pr_err() calls that this merge moves around. * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/signal: keys: kill task_struct->replacement_session_keyring keys: kill the dummy key_replace_session_keyring() keys: change keyctl_session_to_parent() to use task_work_add() genirq: reimplement exit_irq_thread() hook via task_work_add() task_work_add: generic process-context callbacks avr32: missed _TIF_NOTIFY_RESUME on one of do_notify_resume callers parisc: need to check NOTIFY_RESUME when exiting from syscall move key_repace_session_keyring() into tracehook_notify_resume() TIF_NOTIFY_RESUME is defined on all targets now
2012-05-31blackfin: fix possible deadlock in decode_address()Anton Vorontsov
Oleg Nesterov found an interesting deadlock possibility: > sysrq_showregs_othercpus() does smp_call_function(showacpu) > and showacpu() show_stack()->decode_address(). Now suppose that IPI > interrupts the task holding read_lock(tasklist). To fix this, blackfin should not grab the write_ variant of the tasklist lock, read_ one is enough. Suggested-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org> Cc: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-05-31blackfin: a couple of task->mm handling fixesAnton Vorontsov
The patch fixes two problems: 1. Working with task->mm w/o getting mm or grabing the task lock is dangerous as ->mm might disappear (exit_mm() assigns NULL under task_lock(), so tasklist lock is not enough). We can't use get_task_mm()/mmput() pair as mmput() might sleep, so we have to take the task lock while handle its mm. 2. Checking for process->mm is not enough because process' main thread may exit or detach its mm via use_mm(), but other threads may still have a valid mm. To catch this we use find_lock_task_mm(), which walks up all threads and returns an appropriate task (with task lock held). Suggested-by: Oleg Nesterov <oleg@redhat.com> Signed-off-by: Anton Vorontsov <anton.vorontsov@linaro.org> Cc: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2012-05-30sched: Move nr_cpus_allowed out of 'struct sched_rt_entity'Peter Zijlstra
Since nr_cpus_allowed is used outside of sched/rt.c and wants to be used outside of there more, move it to a more natural site. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/n/tip-kr61f02y9brwzkh6x53pdptm@git.kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>
2012-05-23move key_repace_session_keyring() into tracehook_notify_resume()Al Viro
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21blackfin: don't open-code force_sigsegv()Al Viro
... especially since we don't have the right k_sigaction here, so resetting sa_handler won't work. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21blackfin: use set_current_blocked() and block_sigmask()Matt Fleming
As described in e6fa16ab ("signal: sigprocmask() should do retarget_shared_pending()") the modification of current->blocked is incorrect as we need to check whether the signal we're about to block is pending in the shared queue. Also, use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Acked-by: Oleg Nesterov <oleg@redhat.com> Acked-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Matt Fleming <matt.fleming@intel.com> Acked-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-05-21Merge branch 'smp-hotplug-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip Pull smp hotplug cleanups from Thomas Gleixner: "This series is merily a cleanup of code copied around in arch/* and not changing any of the real cpu hotplug horrors yet. I wish I'd had something more substantial for 3.5, but I underestimated the lurking horror..." Fix up trivial conflicts in arch/{arm,sparc,x86}/Kconfig and arch/sparc/include/asm/thread_info_32.h * 'smp-hotplug-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (79 commits) um: Remove leftover declaration of alloc_task_struct_node() task_allocator: Use config switches instead of magic defines sparc: Use common threadinfo allocator score: Use common threadinfo allocator sh-use-common-threadinfo-allocator mn10300: Use common threadinfo allocator powerpc: Use common threadinfo allocator mips: Use common threadinfo allocator hexagon: Use common threadinfo allocator m32r: Use common threadinfo allocator frv: Use common threadinfo allocator cris: Use common threadinfo allocator x86: Use common threadinfo allocator c6x: Use common threadinfo allocator fork: Provide kmemcache based thread_info allocator tile: Use common threadinfo allocator fork: Provide weak arch_release_[task_struct|thread_info] functions fork: Move thread info gfp flags to header fork: Remove the weak insanity sh: Remove cpu_idle_wait() ...
2012-05-21blackfin: fix build after add bf60x mach/pm.hSteven Miao
Signed-off-by: Steven Miao <realmz6@gmail.com> Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21blackfin: bf60x: Rename the DDR controller macroSonic Zhang
Rename the DDR controller macro from DDR0 to DMC0 to avoid confustion for bf60x. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21blackfin: bf60x: cleanup get clock codeSonic Zhang
Remove redundance code for get clock. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21blackfin: bf60x: make clock changeable in kernel menuconfigBob Liu
Add clock changeable support in kernel menuconfig for bf60x. Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21bfin_gpio: fix bf548-ezkit kernel fail to bootSteven Miao
Fix bf548-ezkit kernel fail to boot when request peripheral pins. Signed-off-by: Steven Miao <realmz6@gmail.com> Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21bfin_dma: fix initcall return error in proc_dma_init()Steven Miao
Signed-off-by: Steven Miao <realmz6@gmail.com> Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21Blackfin: delete fork funcMike Frysinger
We don't implement fork() since we are no-mmu, so redirect it to the existing ENOSYS stub rather than adding a custom EINVAL one. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21Blackfin: fix unused clk var warningMike Frysinger
This is only used on BF60x code (so this patch should get squashed into the original one that added it). Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21blackfin: bf60x: fix compiling warningBob Liu
Fix several compiling warning for bf60x. Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21blackfin: bf60x: enable gptimer clock sourceSteven Miao
Signed-off-by: Steven Miao <realmz6@gmail.com> Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21blackfin: cplb: add support for bf60xBob Liu
Bf60x support big CPLB pages, this commit enable it. Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-21blackfin: add bf60x to current frameworkBob Liu
This patch added bf60x to current blackfin kernel framework. Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-05-05blackfin: Use generic init_taskThomas Gleixner
Same code. Use the generic version. The special Makefile treatment is pointless anyway as init_task.o contains only data which is handled by the linker script. So no point on being treated like head text. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Mike Frysinger <vapier@gentoo.org> Link: http://lkml.kernel.org/r/20120503085034.350246420@linutronix.de
2012-03-31new helper: ext2_image_size()Al Viro
... implemented that way since the next commit will leave it almost alone in ext2_fs.h - most of the file (including struct ext2_super_block) is going to move to fs/ext2/ext2.h. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
2012-03-21blackfin:dma: rename bfin_dma_5xx.c to bfin_dma.cBob Liu
bfin_dma_5xx is not a generic name for all blackfin chips. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-03-21Disintegrate asm/system.h for Blackfin [ver #2]David Howells
Disintegrate asm/system.h for Blackfin. Signed-off-by: David Howells <dhowells@redhat.com> cc: uclinux-dist-devel@blackfin.uclinux.org Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-03-21blackfin: cplb-mpu: fix page mask table overflowBarry Song
page mask table will overflow without xip related macros. Signed-off-by: Barry Song <barry.song@analog.com> Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-03-01sched/rt: Use schedule_preempt_disabled()Thomas Gleixner
Coccinelle based conversion. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Acked-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Link: http://lkml.kernel.org/n/tip-24swm5zut3h9c4a6s46x8rws@git.kernel.org Signed-off-by: Ingo Molnar <mingo@elte.hu>
2012-01-09blackfin: time-ts: rm unused func broadcast_timer_setup()Bob Liu
broadcast_timer_setup() has no user now, drop it. Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-01-09bf54x: get mem size: missing break in switchSteven Miao
Signed-off-by: Steven Miao <realmz6@gmail.com> Signed-off-by: Bob Liu <lliubbo@gmail.com>
2012-01-09blackfin: smp: cleanup smp codeBob Liu
move idle task point to percpu blackfin_cpudata and add smp_timer_broadcast interface. enable SUPPLE_1_WAKEUP and add BFIN_IPI_TIMER ipi support. Signed-off-by: Steven Miao <realmz6@gmail.com> Signed-off-by: Bob Liu <lliubbo@gmail.com>