- 30 3月, 2012 1 次提交
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由 Paul Mundt 提交于
Quite a bit of fallout all over the place, nothing terribly exciting. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 29 3月, 2012 1 次提交
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由 David Howells 提交于
Disintegrate asm/system.h for SH. Signed-off-by: NDavid Howells <dhowells@redhat.com> cc: linux-sh@vger.kernel.org
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- 13 1月, 2012 1 次提交
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由 Joe Perches 提交于
Use the more commonly used __noreturn instead of ATTRIB_NORETURN. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: NJoe Perches <joe@perches.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Haavard Skinnemoen <hskinnemoen@gmail.com> Cc: Hans-Christian Egtvedt <egtvedt@samfundet.no> Cc: Tony Luck <tony.luck@intel.com> Cc: Fenghua Yu <fenghua.yu@intel.com> Acked-by: NGeert Uytterhoeven <geert@linux-m68k.org> Acked-by: NRalf Baechle <ralf@linux-mips.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Chris Metcalf <cmetcalf@tilera.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 14 6月, 2011 1 次提交
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由 Mathias Krause 提交于
The address limit is already set in flush_old_exec() so those calls to set_fs(USER_DS) are redundant. Signed-off-by: NMathias Krause <minipli@googlemail.com> Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 24 5月, 2011 1 次提交
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由 Paul Mundt 提交于
Trivial build fix for certain configurations that don't grab linux/prefetch.h via alternate means (specifically SH-2 and SH-3 parts). Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 18 8月, 2010 1 次提交
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由 David Howells 提交于
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: NDavid Howells <dhowells@redhat.com> Tested-by: NRalf Baechle <ralf@linux-mips.org> Acked-by: NRussell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 16 8月, 2010 1 次提交
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由 Paul Mundt 提交于
sys_execve() now takes a const pointer, so reflect this change where the syscall is actually defined, too. Fixes up a build error due to prototype mismatch. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 30 3月, 2010 1 次提交
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由 Tejun Heo 提交于
include cleanup: Update gfp.h and slab.h includes to prepare for breaking 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: NTejun Heo <tj@kernel.org> Guess-its-ok-by: NChristoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
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- 26 1月, 2010 1 次提交
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由 Paul Mundt 提交于
The old ctrl in/out routines are non-portable and unsuitable for cross-platform use. While drivers/sh has already been sanitized, there is still quite a lot of code that is not. This converts the arch/sh/ bits over, which permits us to flag the routines as deprecated whilst still building with -Werror for the architecture code, and to ensure that future users are not added. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 20 1月, 2010 1 次提交
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由 Paul Mundt 提交于
This provides a machine_ops-based reboot interface loosely cloned from x86, and converts the native sh32 and sh64 cases over to it. Necessary both for tying in SMP support and also enabling platforms like SDK7786 to add support for their microcontroller-based power managers. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 13 1月, 2010 1 次提交
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由 Paul Mundt 提交于
This follows the x86 xstate changes and implements a task_xstate slab cache that is dynamically sized to match one of hard FP/soft FP/FPU-less. This also tidies up and consolidates some of the SH-2A/SH-4 FPU fragmentation. Now fpu state restorers are commonly defined, with the init_fpu()/fpu_init() mess reworked to follow the x86 convention. The fpu_init() register initialization has been replaced by xstate setup followed by writing out to hardware via the standard restore path. As init_fpu() now performs a slab allocation a secondary lighterweight restorer is also introduced for the context switch. In the future the DSP state will be rolled in here, too. More work remains for math emulation and the SH-5 FPU, which presently uses its own special (UP-only) interfaces. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 12 1月, 2010 1 次提交
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由 Paul Mundt 提交于
start_thread() will become a bit heavier with the xstate freeing to be added in, so move it out-of-line in preparation. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 05 1月, 2010 1 次提交
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由 Paul Mundt 提交于
Nothing is using these now, so kill them all off. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 08 12月, 2009 1 次提交
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由 Paul Mundt 提交于
This adds preliminary support for the SH-4A UBC to the hw-breakpoints API. Presently only a single channel is implemented, and the ptrace interface still needs to be converted. This is the first step to cleaning up the long-standing UBC mess, making the UBC more generally accessible, and finally making it SMP safe. An additional abstraction will be layered on top of this as with the perf events code to permit the various CPU families to wire up support for their own specific UBCs, as many variations exist. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 25 11月, 2009 1 次提交
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由 Paul Mundt 提交于
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 24 11月, 2009 2 次提交
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由 Stuart Menefy 提交于
A number of small optimisations to FPU handling, in particular: - move the task USEDFPU flag from the thread_info flags field (which is accessed asynchronously to the thread) to a new status field, which is only accessed by the thread itself. This allows locking to be removed in most cases, or can be reduced to a preempt_lock(). This mimics the i386 behaviour. - move the modification of regs->sr and thread_info->status flags out of save_fpu() to __unlazy_fpu(). This gives the compiler a better chance to optimise things, as well as making save_fpu() symmetrical with restore_fpu() and init_fpu(). - implement prepare_to_copy(), so that when creating a thread, we can unlazy the FPU prior to copying the thread data structures. Also make sure that the FPU is disabled while in the kernel, in particular while booting, and for newly created kernel threads, In a very artificial benchmark, the execution time for 2500000 context switches was reduced from 50 to 45 seconds. Signed-off-by: NStuart Menefy <stuart.menefy@st.com> Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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由 Giuseppe CAVALLARO 提交于
sh port of the sLeAZY-fpu feature currently implemented for some architectures such us i386. Right now the SH kernel has a 100% lazy fpu behaviour. This is of course great for applications that have very sporadic or no FPU use. However for very frequent FPU users... you take an extra trap every context switch. The patch below adds a simple heuristic to this code: after 5 consecutive context switches of FPU use, the lazy behavior is disabled and the context gets restored every context switch. After 256 switches, this is reset and the 100% lazy behavior is returned. Tests with LMbench showed no regression. I saw a little improvement due to the prefetching (~2%). The tests below also show that, with this sLeazy patch, indeed, the number of FPU exceptions is reduced. To test this. I hacked the lat_ctx LMBench to use the FPU a little more. sLeasy implementation =========================================== switch_to calls | 79326 sleasy calls | 42577 do_fpu_state_restore calls| 59232 restore_fpu calls | 59032 Exceptions: 0x800 (FPU disabled ): 16604 100% Leazy (default implementation) =========================================== switch_to calls | 79690 do_fpu_state_restore calls | 53299 restore_fpu calls | 53101 Exceptions: 0x800 (FPU disabled ): 53273 Signed-off-by: NGiuseppe Cavallaro <peppe.cavallaro@st.com> Signed-off-by: NStuart Menefy <stuart.menefy@st.com> Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 27 10月, 2009 1 次提交
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由 Paul Mundt 提交于
Many of these symbols went away completely, or we just never cared about them in the first place. Trim the exports down to the essential set. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 24 8月, 2009 1 次提交
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由 Jon Frosdick 提交于
This patches will trigger a reboot using the watchdog timer instead of double fault. Unlike the previous method, this one actually works in 32 bit mode. Reset should also be cleaner. Signed-off-by: NJon Frosdick <jon.frosdick@st.com> Signed-off-by: NCarl Shaw <carl.shaw@st.com> Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 11 7月, 2009 1 次提交
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由 Matt Fleming 提交于
Annotate __switch_to() so that the function graph tracer does not try to trace it. Use __notrace_funcgraph, as opposed to notrace, so that other tracers can continue to trace __switch_to(). The reason that we don't want to trace __switch_to() with the function graph tracer is because of how the return address stack in task_struct is implemented. When we enter __switch_to we store the real return address on prev's ret_stack. When we return from __switch_to() we've patched the return address on the kernel stack to be return_to_handler. Calling return_to_handler we do, -> ftrace_return_to_handler() -> ftrace_pop_return_ftrace() Which tries to pop the real return address from current->ret_stack. The problem being that we stored the return address on prev->ret_stack, but current now points to next, and next->ret_stack doesn't contain the correct return address (and is possibly even empty). Signed-off-by: NMatt Fleming <matt@console-pimps.org> Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 19 6月, 2009 1 次提交
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由 Oleg Nesterov 提交于
avr32, mn10300, parisc, s390, sh, xtensa: They never set PT_DTRACE, but clear it after do_execve(). Signed-off-by: NOleg Nesterov <oleg@redhat.com> Cc: David Howells <dhowells@redhat.com> Acked-by: NKyle McMartin <kyle@mcmartin.ca> Cc: Grant Grundler <grundler@parisc-linux.org> Cc: Matthew Wilcox <matthew@wil.cx> Acked-by: NMartin Schwidefsky <schwidefsky@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Acked-by: NPaul Mundt <lethal@linux-sh.org> Acked-by: NChris Zankel <chris@zankel.net> Acked-by: NRoland McGrath <roland@redhat.com> Acked-by: NHaavard Skinnemoen <haavard.skinnemoen@atmel.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 18 6月, 2009 1 次提交
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由 Christoph Hellwig 提交于
arch/sh has a couple of stray markers without any users introduced in commit 3d58695e. Remove them in preparation of removing the markers in favour of the TRACE_EVENT macro (and also because we don't keep dead code around). Signed-off-by: NChristoph Hellwig <hch@lst.de> Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 08 5月, 2009 1 次提交
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由 Kieran Bingham 提交于
Signed-off-by: NKieran Bingham <kieranbingham@gmail.com> Signed-off-by: NPeter Griffin <pgriffin@mpc-data.co.uk> Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 04 4月, 2009 1 次提交
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由 Michael Trimarchi 提交于
There were a number of issues with the DSP context save/restore code, mostly left-over relics from when it was introduced on SH3-DSP with little follow-up testing, resulting in things like task_pt_dspregs() referencing incorrect state on the stack. This follows the MIPS convention of tracking the DSP state in the thread_struct and handling the state save/restore in switch_to() and finish_arch_switch() respectively. The regset interface is also updated, which allows us to finally be rid of task_pt_dspregs() and the special cased task_pt_regs(). Signed-off-by: NMichael Trimarchi <michael@evidence.eu.com> Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 03 4月, 2009 1 次提交
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由 Alexey Dobriyan 提交于
First argument unused since 2.3.11. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com> Cc: <linux-arch@vger.kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 22 12月, 2008 5 次提交
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由 Paul Mundt 提交于
This can use the same implementation as sh64, the generated assembly is the same between the new and old version, so there is not much point in leaving it open coded in inline assembly. This is preparatory work for future consolidation of the _32/_64 variants. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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由 Paul Mundt 提交于
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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由 Paul Mundt 提交于
Description snipped from Steven Rostedt's PPC patch: When idle is called, interrupts are blocked, but the idle function will still wake up on an interrupt. The problem is that the interrupt disabled latency tracer will take this call to idle as a latency. This patch disables the latency tracing when going into idle. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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由 Paul Mundt 提交于
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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由 Paul Mundt 提交于
This implements a simple show_code() that is in turn plugged in to show_regs() to provide minimal code dumping at the end of the trace. Built on top of a simple instruction disassembler derived from the binutils opcode table. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 21 9月, 2008 2 次提交
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由 Paul Mundt 提交于
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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由 Paul Mundt 提交于
This implements a few trace points across events that are deemed interesting. This implements a number of trace points: - The page fault handler / TLB miss - IPC calls - Kernel thread creation The original LTTng patch had the slow-path instrumented, which fails to account for the vast majority of events. In general placing this in the fast-path is not a huge performance hit, as we don't take page faults for kernel addresses. The other bits of interest are some of the other trap handlers, as well as the syscall entry/exit (which is better off being handled through the tracehook API). Most of the other trap handlers are corner cases where alternate means of notification exist, so there is little value in placing extra trace points in these locations. Based on top of the points provided both by the LTTng instrumentation patch as well as the patch shipping in the ST-Linux tree, albeit in a stripped down form. Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 08 9月, 2008 2 次提交
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由 Paul Mundt 提交于
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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由 Paul Mundt 提交于
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 28 7月, 2008 1 次提交
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由 Adrian Bunk 提交于
This patch contains the following cleanups: - make the following needlessly global code static: - cf-enabler.c: cf_init() - cpu/clock.c: __clk_enable() - cpu/clock.c: __clk_disable() - process_32.c: default_idle() - time_32.c: struct clocksource_sh - timers/timer-tmu.c: struct tmu_timer_ops - remove the following unused functions (no CONFIG_BLK_DEV_FD on sh): - process_{32,64}.c: disable_hlt() - process_{32,64}.c: enable_hlt() Signed-off-by: NAdrian Bunk <bunk@kernel.org> Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 19 7月, 2008 1 次提交
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由 Thomas Gleixner 提交于
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: Neric miao <eric.y.miao@gmail.com> Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
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- 26 3月, 2008 1 次提交
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由 Paul Mundt 提交于
Presently with preempt enabled there's the possibility to be preempted after the TIF_USEDFPU test and the register save, leading to bogus state post-__switch_to(). Use an explicit preempt_disable()/enable() pair around unlazy_fpu()/clear_fpu() to avoid this. Follows the x86 change. Reported-by: NTakuo Koguchi <takuo.koguchi.sw@hitachi.com> Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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- 28 1月, 2008 3 次提交
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由 Stuart Menefy 提交于
This implements kernel-level atomic rollback built on top of gUSA, as an alternative non-IRQ based atomicity method. This is generally a faster method for platforms that are lacking the LL/SC pairs that SH-4A and later use, and is only supportable on legacy cores. Signed-off-by: NStuart Menefy <stuart.menefy@st.com> Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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由 Paul Mundt 提交于
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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由 Paul Mundt 提交于
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
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