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* bfin: Fix typo in arch_cpu_idle()Ingo Molnar2013-04-101-1/+1
| | | | | | | | | | | | | | Introduced by commit 25d67f860f3a ("bfin: Use generic idle loop"). Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Paul McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Cc: Magnus Damm <magnus.damm@gmail.com> Cc: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Ingo Molnar <mingo@kernel.org>
* bfin: Use generic idle loopThomas Gleixner2013-04-081-26/+6
| | | | | | | | | | | | | Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Rusty Russell <rusty@rustcorp.com.au> Cc: Paul McKenney <paulmck@linux.vnet.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Reviewed-by: Cc: Srivatsa S. Bhat <srivatsa.bhat@linux.vnet.ibm.com> Cc: Magnus Damm <magnus.damm@gmail.com> Cc: Mike Frysinger <vapier@gentoo.org> Link: http://lkml.kernel.org/r/20130321215234.014923303@linutronix.de Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* blackfin idle: Fix compile errorLars-Peter Clausen2013-02-231-3/+1
| | | | | | | | | | | | | | | | Commit 26bab0c ("blackfin idle: delete pm_idle") introduced the following compile error: arch/blackfin/kernel/process.c: In function ‘cpu_idle’: arch/blackfin/kernel/process.c:83: error: ‘idle’ undeclared (first use in this function) arch/blackfin/kernel/process.c:83: error: (Each undeclared identifier is reported only once arch/blackfin/kernel/process.c:83: error: for each function it appears in.) arch/blackfin/kernel/process.c:88: error: implicit declaration of function ‘idle’ This patch fixes it. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Acked-by: Len Brown <len.brown@intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
* blackfin idle: delete pm_idleLen Brown2013-02-181-7/+0
| | | | | | | pm_idle is dead code on blackfin. Signed-off-by: Len Brown <len.brown@intel.com> Cc: uclinux-dist-devel@blackfin.uclinux.org
* flagday: kill pt_regs argument of do_fork()Al Viro2012-11-291-1/+1
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* flagday: don't pass regs to copy_thread()Al Viro2012-11-291-3/+3
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* bfin: switch to generic vfork, get rid of pointless wrappersAl Viro2012-11-291-18/+3
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* blackfin: switch to generic sys_execve()Al Viro2012-10-151-20/+0
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* blackfin: convert kernel_thread() and kernel_execve() to generic onesAl Viro2012-10-151-38/+17
| | | | Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
* vfs: define struct filename and have getname() return itJeff Layton2012-10-131-2/+2
| | | | | | | | | | | | | | | | | | | | | | 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>
* sched: Move nr_cpus_allowed out of 'struct sched_rt_entity'Peter Zijlstra2012-05-301-1/+1
| | | | | | | | | 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>
* blackfin: add bf60x to current frameworkBob Liu2012-05-211-1/+7
| | | | | | This patch added bf60x to current blackfin kernel framework. Signed-off-by: Bob Liu <lliubbo@gmail.com>
* Disintegrate asm/system.h for Blackfin [ver #2]David Howells2012-03-211-0/+1
| | | | | | | | 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>
* sched/rt: Use schedule_preempt_disabled()Thomas Gleixner2012-03-011-3/+1
| | | | | | | | | 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>
* nohz: Remove tick_nohz_idle_enter_norcu() / tick_nohz_idle_exit_norcu()Frederic Weisbecker2011-12-111-2/+4
| | | | | | | | | | | | | | | | | | Those two APIs were provided to optimize the calls of tick_nohz_idle_enter() and rcu_idle_enter() into a single irq disabled section. This way no interrupt happening in-between would needlessly process any RCU job. Now we are talking about an optimization for which benefits have yet to be measured. Let's start simple and completely decouple idle rcu and dyntick idle logics to simplify. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Reviewed-by: Josh Triplett <josh@joshtriplett.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* nohz: Allow rcu extended quiescent state handling seperately from tick stopFrederic Weisbecker2011-12-111-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | It is assumed that rcu won't be used once we switch to tickless mode and until we restart the tick. However this is not always true, as in x86-64 where we dereference the idle notifiers after the tick is stopped. To prepare for fixing this, add two new APIs: tick_nohz_idle_enter_norcu() and tick_nohz_idle_exit_norcu(). If no use of RCU is made in the idle loop between tick_nohz_enter_idle() and tick_nohz_exit_idle() calls, the arch must instead call the new *_norcu() version such that the arch doesn't need to call rcu_idle_enter() and rcu_idle_exit(). Otherwise the arch must call tick_nohz_enter_idle() and tick_nohz_exit_idle() and also call explicitly: - rcu_idle_enter() after its last use of RCU before the CPU is put to sleep. - rcu_idle_exit() before the first use of RCU after the CPU is woken up. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: David Miller <davem@davemloft.net> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Paul Mackerras <paulus@samba.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com>
* nohz: Separate out irq exit and idle loop dyntick logicFrederic Weisbecker2011-12-111-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The tick_nohz_stop_sched_tick() function, which tries to delay the next timer tick as long as possible, can be called from two places: - From the idle loop to start the dytick idle mode - From interrupt exit if we have interrupted the dyntick idle mode, so that we reprogram the next tick event in case the irq changed some internal state that requires this action. There are only few minor differences between both that are handled by that function, driven by the ts->inidle cpu variable and the inidle parameter. The whole guarantees that we only update the dyntick mode on irq exit if we actually interrupted the dyntick idle mode, and that we enter in RCU extended quiescent state from idle loop entry only. Split this function into: - tick_nohz_idle_enter(), which sets ts->inidle to 1, enters dynticks idle mode unconditionally if it can, and enters into RCU extended quiescent state. - tick_nohz_irq_exit() which only updates the dynticks idle mode when ts->inidle is set (ie: if tick_nohz_idle_enter() has been called). To maintain symmetry, tick_nohz_restart_sched_tick() has been renamed into tick_nohz_idle_exit(). This simplifies the code and micro-optimize the irq exit path (no need for local_irq_save there). This also prepares for the split between dynticks and rcu extended quiescent state logics. We'll need this split to further fix illegal uses of RCU in extended quiescent states in the idle loop. Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com> Cc: Mike Frysinger <vapier@gentoo.org> Cc: Guan Xuetao <gxt@mprc.pku.edu.cn> Cc: David Miller <davem@davemloft.net> Cc: Chris Metcalf <cmetcalf@tilera.com> Cc: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Peter Zijlstra <a.p.zijlstra@chello.nl> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Paul Mackerras <paulus@samba.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Signed-off-by: Paul E. McKenney <paulmck@linux.vnet.ibm.com> Reviewed-by: Josh Triplett <josh@joshtriplett.org>
* Blackfin: exec: remove redundant set_fs(USER_DS)Mathias Krause2011-07-231-1/+0
| | | | | | | | The address limit is already set in flush_old_exec() so this set_fs(USER_DS) is redundant. Signed-off-by: Mathias Krause <minipli@googlemail.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: don't touch task->cpus_allowed directlyKOSAKI Motohiro2011-05-251-4/+2
| | | | | | | | Every callter (except kthread_bind) should use proper set_cpus_allowed_ptr() APIs. Signed-off-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* BKL: remove extraneous #include <smp_lock.h>Arnd Bergmann2010-11-171-1/+0
| | | | | | | | | | The big kernel lock has been removed from all these files at some point, leaving only the #include. Remove this too as a cleanup. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin: access_ok: permit L1 stackBarry Song2010-10-221-0/+5
| | | | | | | | | When apps run with their stack in L1, some system calls might be made where a buffer is in the stack as an argument. So make sure the core Blackfin access code does not reject this memory location. Signed-off-by: Barry Song <barry.song@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: Rename IRQ flags handling functionsDavid Howells2010-10-071-2/+2
| | | | | | | | | | | | | | | Rename h/w IRQ flags handling functions to be in line with what is expected for the irq renaming patch. This renames local_*_hw() to hard_local_*() using the following perl command: perl -pi -e 's/local_irq_(restore|enable|disable)_hw/hard_local_irq_\1/ or s/local_irq_save_hw([_a-z]*)[(]flags[)]/flags = hard_local_irq_save\1()/' `find arch/blackfin/ -name "*.[ch]"` and then fixing up asm/irqflags.h manually. Additionally, arch/hard_local_save_flags() and arch/hard_local_irq_save() both return the flags rather than passing it through the argument list. Signed-off-by: David Howells <dhowells@redhat.com>
* Make do_execve() take a const filename pointerDavid Howells2010-08-181-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | Make do_execve() take a const filename pointer so that kernel_execve() compiles correctly on ARM: arch/arm/kernel/sys_arm.c:88: warning: passing argument 1 of 'do_execve' discards qualifiers from pointer target type This also requires the argv and envp arguments to be consted twice, once for the pointer array and once for the strings the array points to. This is because do_execve() passes a pointer to the filename (now const) to copy_strings_kernel(). A simpler alternative would be to cast the filename pointer in do_execve() when it's passed to copy_strings_kernel(). do_execve() may not change any of the strings it is passed as part of the argv or envp lists as they are some of them in .rodata, so marking these strings as const should be fine. Further kernel_execve() and sys_execve() need to be changed to match. This has been test built on x86_64, frv, arm and mips. Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Mark arguments to certain syscalls as being constDavid Howells2010-08-141-1/+1
| | | | | | | | | | | | | | | | Mark arguments to certain system calls as being const where they should be but aren't. The list includes: (*) The filename arguments of various stat syscalls, execve(), various utimes syscalls and some mount syscalls. (*) The filename arguments of some syscall helpers relating to the above. (*) The buffer argument of various write syscalls. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: David S. Miller <davem@davemloft.net> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-301-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* Blackfin: initial regset supportMike Frysinger2010-03-091-7/+0
| | | | | | We don't support core dumps (yet?), but this should make things easier. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: finish_atomic_sections: optimize the RTS stepMike Frysinger2009-12-151-7/+11
| | | | | | | No point in returning to userspace just to have it immediately perform the RTS step. We have to update the PC anyways, so do the RTS too. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: improve async bank access checking (for cross-banks & XIP)Bernd Schmidt2009-12-151-15/+62
| | | | | | | | | | | The access_ok() function did not accept ranges within the async banks which made it impossible to do XIP in flash. Fixing that also showed that the current bfin_mem_access_type() code did not work with accesses that spanned async banks (like a file system). So split out and fix the async bank checks so that all these scenarios work as expected. Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Merge branch 'bkl-arch-for-linus' of ↵Linus Torvalds2009-12-091-5/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'bkl-arch-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: mn10300: Remove the BKL from sys_execve m68knommu: Remove the BKL from sys_execve m68k: Remove the BKL from sys_execve h83000: Remove BKL from sys_execve frv: Remove the BKL from sys_execve blackfin: Remove the BKL from sys_execve um: Remove BKL from mmapper um: Remove BKL from random s390: Remove BKL from prng
| * blackfin: Remove the BKL from sys_execveJohn Kacur2009-10-141-5/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This looks like a cut-and-paste job. For example, compare this function to sys_execve in arch/x86/kernel/process_64.c and it is almost line by line the same, except the one in x86 nolonger has the big kernel lock. All of the functions called between the lock are generic and not specific to blackfin - thus, I believe it is safe to remove the bkl here. Signed-off-by: John Kacur <jkacur@redhat.com> Reviewed-by: Frederic Weisbecker <fweisbec@gmail.com> Acked-by: Mike Frysinger <vapier@gentoo.org> LKML-Reference: <alpine.LFD.2.00.0910130007240.3658@localhost.localdomain> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* | Blackfin: fix SMP build error in start_thread()Graf Yang2009-11-251-1/+1
|/ | | | | | | | | Commit d5ce528c8e46fa5afb9 (Blackfin: convert irq/process to asm-generic) incorrectly merged the smp and non-smp cases of start_thread() causing the L1 stack to be setup on the SMP port instead of the UP port. Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: mass clean up of copyright/licensing infoRobin Getz2009-10-071-24/+3
| | | | | | | | | | | | | | | | | | Bill Gatliff & David Brownell pointed out we were missing some copyrights, and licensing terms in some of the files in ./arch/blackfin, so this fixes things, and cleans them up. It also removes: - verbose GPL text(refer to the top level ./COPYING file) - file names (you are looking at the file) - bug url (it's in the ./MAINTAINERS file) - "or later" on GPL-2, when we did not have that right It also allows some Blackfin-specific assembly files to be under a BSD like license (for people to use them outside of Linux). Signed-off-by: Robin Getz <robin.getz@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: optimize fixed code handling for the most common caseMike Frysinger2009-09-171-8/+2
| | | | | | | | | | | The majority of the time we are returning to user space, it is not in the fixed atomic code region. So rather than branch to a function where we check the PC and return, do the check inline and branch only when needed. Also, tweak some of the fixed code handling based on assumptions we are aware of but cannot be expressed in C. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: handle BF561 Core B memory regions better when SMP=nMike Frysinger2009-07-161-7/+7
| | | | | | | | | Rather than assume Core B is always run with caches turned on, let people load into any of the on-chip memory regions. It is their business how the SRAM/Cache regions are utilized, so don't prevent them from being able to load into them. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: unify memory region checks between kgdb and trapsMike Frysinger2009-06-231-30/+121
| | | | | | | | | The kgdb (in multiple places) and traps code developed pretty much identical checks for how to access different regions of the Blackfin memory map, but each wasn't 100%, so unify them to avoid duplication, bitrot, and bugs with edge cases. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: convert irq/process to asm-genericMike Frysinger2009-06-191-0/+23
| | | | Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Blackfin: push access_ok() L1 attribute downMike Frysinger2009-06-121-0/+3
| | | | | | | | | There is no need for the L1 attribute to be on the prototype of the access_ok() function as all consumers of the function do not care where it lives -- they'll always use pcrel calls to get to it. This prevents pointless recompiles of most of the system when this config option changes. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
* Merge git://git.infradead.org/mtd-2.6Linus Torvalds2009-04-061-1/+1
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.infradead.org/mtd-2.6: (53 commits) [MTD] struct device - replace bus_id with dev_name(), dev_set_name() [MTD] [NOR] Fixup for Numonyx M29W128 chips [MTD] mtdpart: Make ecc_stats more realistic. powerpc/85xx: TQM8548: Update DTS file for multi-chip support powerpc: NAND: FSL UPM: document new bindings [MTD] [NAND] FSL-UPM: Add wait flags to support board/chip specific delays [MTD] [NAND] FSL-UPM: add multi chip support [MTD] [NOR] Add device parent info to physmap_of [MTD] [NAND] Add support for NAND on the Socrates board [MTD] [NAND] Add support for 4KiB pages. [MTD] sysfs support should not depend on CONFIG_PROC_FS [MTD] [NAND] Add parent info for CAFÉ controller [MTD] support driver model updates [MTD] driver model updates (part 2) [MTD] driver model updates [MTD] [NAND] move gen_nand's probe function to .devinit.text [MTD] [MAPS] move sa1100 flash's probe function to .devinit.text [MTD] fix use after free in register_mtd_blktrans [MTD] [MAPS] Drop now unused sharpsl-flash map [MTD] ofpart: Check name property to determine partition nodes. ... Manually fix trivial conflict in drivers/mtd/maps/Makefile
| * [MTD] Fix a bad dependency in the Blackfin codeBernd Schmidt2009-03-241-1/+1
| | | | | | | | | | | | | | | | | | | | Fix a bad dependency in the Blackfin code on a RomFS config symbol that doesn't exist upstream. Signed-off-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: David Howells <dhowells@redhat.com> Tested-by: Bernd Schmidt <bernd.schmidt@analog.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
* | Simplify copy_thread()Alexey Dobriyan2009-04-031-1/+1
|/ | | | | | | | | | First argument unused since 2.3.11. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Blackfin arch: merge adeos blackfin part to arch/blackfin/Yi Li2009-01-071-2/+5
| | | | | | | | | | | | | | | | | | [Mike Frysinger <vapier.adi@gmail.com>: - handle bf531/bf532/bf534/bf536 variants in ipipe.h - cleanup IPIPE logic for bfin_set_irq_handler() - cleanup ipipe asm code a bit and add missing ENDPROC() - simplify IPIPE code in trap_c - unify some of the IPIPE code and fix style - simplify DO_IRQ_L1 handling with ipipe code - revert IRQ_SW_INT# addition from ipipe merge - remove duplicate get_{c,s}clk() prototypes ] Signed-off-by: Yi Li <yi.li@analog.com> Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: smp patch cleanup from LKML reviewGraf Yang2009-01-071-0/+1
| | | | | | | | | 1. Use inline get_l1_... functions instead of macro 2. Fix compile issue about smp barrier functions Signed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: SMP supporting patchset: Blackfin kernel and memory ↵Graf Yang2008-11-181-8/+15
| | | | | | | | | | | | | | management code Blackfin dual core BF561 processor can support SMP like features. https://docs.blackfin.uclinux.org/doku.php?id=linux-kernel:smp-like In this patch, we provide SMP extend to Blackfin kernel and memory management code Singed-off-by: Graf Yang <graf.yang@analog.com> Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: move EXPORT_SYMBOL to the place where it is actually definedMike Frysinger2008-10-281-0/+1
| | | | | | | | | | - kernel_thread - irq_flags - checksum Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* Blackfin arch: fix bug - shared lib function in L2 failed be calledJie Zhang2008-10-281-1/+6
| | | | | | | | Allow user space to access L2 SRAM. Signed-off-by: Jie Zhang <jie.zhang@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* nohz: prevent tick stop outside of the idle loopThomas Gleixner2008-07-181-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Jack Ren and Eric Miao tracked down the following long standing problem in the NOHZ code: scheduler switch to idle task enable interrupts Window starts here ----> interrupt happens (does not set NEED_RESCHED) irq_exit() stops the tick ----> interrupt happens (does set NEED_RESCHED) return from schedule() cpu_idle(): preempt_disable(); Window ends here The interrupts can happen at any point inside the race window. The first interrupt stops the tick, the second one causes the scheduler to rerun and switch away from idle again and we end up with the tick disabled. The fact that it needs two interrupts where the first one does not set NEED_RESCHED and the second one does made the bug obscure and extremly hard to reproduce and analyse. Kudos to Jack and Eric. Solution: Limit the NOHZ functionality to the idle loop to make sure that we can not run into such a situation ever again. cpu_idle() { preempt_disable(); while(1) { tick_nohz_stop_sched_tick(1); <- tell NOHZ code that we are in the idle loop while (!need_resched()) halt(); tick_nohz_restart_sched_tick(); <- disables NOHZ mode preempt_enable_no_resched(); schedule(); preempt_disable(); } } In hindsight we should have done this forever, but ... /me grabs a large brown paperbag. Debugged-by: Jack Ren <jack.ren@marvell.com>, Debugged-by: eric miao <eric.y.miao@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
* [Blackfin] arch: fix bug - breaking the atomic sections code.Bernd Schmidt2008-05-071-1/+1
| | | | | | | | | | | | The following cleanup patch: add __user markings to a few userspace system functions mysteriously added a "&" operator that doesn't belong in there, breaking the atomic sections code. Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* [Blackfin] arch: This allows XIP to work with FD-PIC.Bernd Schmidt2008-04-231-0/+6
| | | | | | | | | | | | | | | | | | | Previously, init failed to do anything meaningful; it turns out that the reason is that FD-PIC has a readonly data section which can be located in the XIP filesystem, and various address checks in the kernel reject such addresses for syscall arguments. Hence, init's execve ("/bin/sh", ...) failed with error code EFAULT. There's room for improvement here: in case people want to have filesystems on flash rather than in main memory, _access_ok should be modified to allow this. This bug fix is also dedicated to Michael Hennerich. Signed-off-by: Bernd Schmidt <bernds_cb1@t-online.de> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* [Blackfin] arch: add missing __user marking to ss_sp member of signalstack ↵Mike Frysinger2008-03-061-9/+11
| | | | | | | | and a few userspace system functions Signed-off-by: Mike Frysinger <vapier.adi@gmail.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
* [Blackfin] arch: initial generic time and clock sourcesVitja Makarov2008-02-291-15/+28
| | | | | | | | | This patch enables Hight-Res Timers and tickless kernel Signed-off-by: Vitja Makarov <vitja.makarov@gmail.com> Signed-off-by: Michael Hennerich <michael.hennerich@analog.com> Signed-off-by: Bryan Wu <cooloney@kernel.org>
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