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2008-04-26x86: switch 64-bit to generic find_first_bitAlexander van Heukelum
Switch x86_64 to generic find_first_bit. The x86_64-specific implementation is not removed. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: generic versions of find_first_(zero_)bit, convert i386Alexander van Heukelum
Generic versions of __find_first_bit and __find_first_zero_bit are introduced as simplified versions of __find_next_bit and __find_next_zero_bit. Their compilation and use are guarded by a new config variable GENERIC_FIND_FIRST_BIT. The generic versions of find_first_bit and find_first_zero_bit are implemented in terms of the newly introduced __find_first_bit and __find_first_zero_bit. This patch does not remove the i386-specific implementation, but it does switch i386 to use the generic functions by setting GENERIC_FIND_FIRST_BIT=y for X86_32. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: merge the simple bitops and move them to bitops.hAlexander van Heukelum
Some of those can be written in such a way that the same inline assembly can be used to generate both 32 bit and 64 bit code. For ffs and fls, x86_64 unconditionally used the cmov instruction and i386 unconditionally used a conditional branch over a mov instruction. In the current patch I chose to select the version based on the availability of the cmov instruction instead. A small detail here is that x86_64 did not previously set CONFIG_X86_CMOV=y. Improved comments for ffs, ffz, fls and variations. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86, uml: fix uml with generic find_next_bit for x86Alexander van Heukelum
Update UML to use the generic bits too. Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: change x86 to use generic find_next_bitAlexander van Heukelum
The versions with inline assembly are in fact slower on the machines I tested them on (in userspace) (Athlon XP 2800+, p4-like Xeon 2.8GHz, AMD Opteron 270). The i386-version needed a fix similar to 06024f21 to avoid crashing the benchmark. Benchmark using: gcc -fomit-frame-pointer -Os. For each bitmap size 1...512, for each possible bitmap with one bit set, for each possible offset: find the position of the first bit starting at offset. If you follow ;). Times include setup of the bitmap and checking of the results. Athlon Xeon Opteron 32/64bit x86-specific: 0m3.692s 0m2.820s 0m3.196s / 0m2.480s generic: 0m2.622s 0m1.662s 0m2.100s / 0m1.572s If the bitmap size is not a multiple of BITS_PER_LONG, and no set (cleared) bit is found, find_next_bit (find_next_zero_bit) returns a value outside of the range [0, size]. The generic version always returns exactly size. The generic version also uses unsigned long everywhere, while the x86 versions use a mishmash of int, unsigned (int), long and unsigned long. Using the generic version does give a slightly bigger kernel, though. defconfig: text data bss dec hex filename x86-specific: 4738555 481232 626688 5846475 5935cb vmlinux (32 bit) generic: 4738621 481232 626688 5846541 59360d vmlinux (32 bit) x86-specific: 5392395 846568 724424 6963387 6a40bb vmlinux (64 bit) generic: 5392458 846568 724424 6963450 6a40fa vmlinux (64 bit) Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26uml: Kconfig cleanupIngo Molnar
pointed out by Linus: arch/um/Kconfig.x86_64 should include arch/x86/Kconfig.cpu instead of defining those symbols itself. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26uml: fix build errorIngo Molnar
fix: arch/um/os-Linux/helper.c: In function 'run_helper': arch/um/os-Linux/helper.c:73: error: 'PATH_MAX' undeclared (first use in this function) Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-fixes * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-fixes: x86 PAT: decouple from nonpromisc devmem x86 PAT: tone down debugging messages
2008-04-26Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-optimized-inlining * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-optimized-inlining: generic: make optimized inlining arch-opt-in x86: add optimized inlining
2008-04-26Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-misc * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-misc: (28 commits) x86: section mismatch fixes, #3 x86: section mismatch fixes, #2 x86: pgtable_32.h - prototype and section mismatch fixes x86: unlock_ExtINT_logic() - fix section mismatch warnings x86: uniq_ioapic_id - fix section mismatch warning x86: trampoline_32.S - switch to .cpuinit.data x86: use get_bios_ebda() x86: remove duplicate get_bios_ebda() from rio.h x86: get_bios_ebda() requires asm/io.h x86: use cpumask function for present, possible, and online cpus x86: cleanup div_sc() usage x86: cleanup clocksource_hz2mult usage x86: remove unnecessary memset and NULL check after alloc_bootmem() x86: use bitmap library for pin_programmed x86: use MP_intsrc_info() x86: use BUILD_BUG_ON() for the size of struct intel_mp_floating x86_64 ia32 ptrace: convert to compat_arch_ptrace x86_64 ia32 ptrace: use compat_ptrace_request for siginfo x86 signals: lift set_fs x86 signals: lift flags diddling code ...
2008-04-26x86 PAT: decouple from nonpromisc devmemIngo Molnar
Linus pointed it out that PAT should not depend on NONPROMISC_DEVMEM. Also make PAT non-default. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-26generic: make optimized inlining arch-opt-inIngo Molnar
Stephen Rothwell reported that linux-next did not build on powerpc64. make optimized inlining dependent on architecture opt-in. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: add optimized inliningIngo Molnar
add CONFIG_OPTIMIZE_INLINING=y. allow gcc to optimize the kernel image's size by uninlining functions that have been marked 'inline'. Previously gcc was forced by Linux to always-inline these functions via a gcc attribute: #define inline inline __attribute__((always_inline)) Especially when the user has already selected CONFIG_OPTIMIZE_FOR_SIZE=y this can make a huge difference in kernel image size (using a standard Fedora .config): text data bss dec hex filename 5613924 562708 3854336 10030968 990f78 vmlinux.before 5486689 562708 3854336 9903733 971e75 vmlinux.after that's a 2.3% text size reduction (!). Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: section mismatch fixes, #3Jacek Luczak
This patch fixes section mismatch warnings in unlock_ExtINT_logic(). WARNING: arch/x86/kernel/built-in.o(.text+0x14a92): Section mismatch in reference from the function unlock_ExtINT_logic() to the function .init.text:find_isa_irq_pin() The function unlock_ExtINT_logic() references the function __init find_isa_irq_pin(). This is often because unlock_ExtINT_logic lacks a __init annotation or the annotation of find_isa_irq_pin is wrong. Signed-off-by: Jacek Luczak <luczak.jacek@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-26x86: unlock_ExtINT_logic() - fix section mismatch warningsJacek Luczak
Fix following warning: WARNING: arch/x86/kernel/built-in.o(.text+0x12cc9): Section mismatch in reference from the function unlock_ExtINT_logic() unlock_ExtINT_logic() is only used by __init check_timer(). Annotate unlock_ExtINT_logic() witch __init. Signed-off-by: Jacek Luczak <luczak.jacek@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-26x86: uniq_ioapic_id - fix section mismatch warningJacek Luczak
Fix folowing warning: WARNING: arch/x86/kernel/built-in.o(.text+0x10799): Section mismatch in reference from the function uniq_ioapic_id() uniq_ioapic_id() is only used by __init mp_register_ioapic(). Annotate uniq_ioapic_id() with __init. Signed-off-by: Jacek Luczak <luczak.jacek@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-26x86: trampoline_32.S - switch to .cpuinit.dataJacek Luczak
This patch fixes section mismatch warnings of __cpuinit setup_trampoline() on 32-bit host. Signed-off-by: Jacek Luczak <luczak.jacek@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
2008-04-26x86: use get_bios_ebda()Akinobu Mita
Use get_bios_ebda(). Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: remove duplicate get_bios_ebda() from rio.hAkinobu Mita
get_bios_ebda() exists in asm/rio.h and asm/bios_ebda.h. This patch removes the one in asm/rio.h. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: use cpumask function for present, possible, and online cpusAkinobu Mita
cpu_online(), cpu_present(), for_each_possible_cpu(), num_possible_cpus() Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: cleanup div_sc() usageAkinobu Mita
Remove the magic number in the third argment of div_sc(). Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: cleanup clocksource_hz2mult usageAkinobu Mita
Remove the magic number in the second argument of clocksource_hz2mult() Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: remove unnecessary memset and NULL check after alloc_bootmem()Akinobu Mita
memset and NULL check after alloc_bootmem() are unnecessary. Because it returns zeroed memory and it never return NULL. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: use bitmap library for pin_programmedAkinobu Mita
Use bitmap library for pin_programmed rather than reinvent bitmaps. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: use MP_intsrc_info()Akinobu Mita
Remove duplicate code by using MP_intsrc_info() in mpparse.c Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: use BUILD_BUG_ON() for the size of struct intel_mp_floatingAkinobu Mita
Use BUILD_BUG_ON() instead of compile-time error technique with extern non-exsistent function. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86_64 ia32 ptrace: convert to compat_arch_ptraceRoland McGrath
Now that there are no more special cases in sys32_ptrace, we can convert to using the generic compat_sys_ptrace entry point. The sys32_ptrace function gets simpler and becomes compat_arch_ptrace. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86_64 ia32 ptrace: use compat_ptrace_request for siginfoRoland McGrath
This removes the special-case handling for PTRACE_GETSIGINFO and PTRACE_SETSIGINFO from x86_64's sys32_ptrace. The generic compat_ptrace_request code handles these. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86 signals: lift set_fsRoland McGrath
This lifts the set_fs(USER_DS) call for signal handler setup out of the three places copying the same code into the one place that calls them all. There is no change in what it does. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86 signals: lift flags diddling codeRoland McGrath
This lifts the code diddling the TF and DF bits for signal handler setup out of the several places copying the same code into the one place that calls them all. There is no change in what it does. I also separated the recently-added DF bit clearing from the TF diddling. The compiler turns them back into one instruction anyway. The tossing in of DF to the same line of code with no new comments was a bit more arcane than seems wise. Signed-off-by: Roland McGrath <roland@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: remove NexGen supportDmitri Vorobiev
It is claimed that NexGen CPUs were never shipped: http://lkml.org/lkml/2008/4/20/179 Also, the kernel support for these chips has been broken for a long time, the code intended to support NexGen thereby being essentially dead. As an outcome of the discussion that can be found using the URL above, this patch removes the NexGen support altogether. The changes in this patch survived a defconfig build for i386, a couple of successful randconfig builds, as well as a runtime test, which consisted in booting a 32-bit x86 box up to the shell prompt. Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: array can become staticDmitri Vorobiev
In arch/x86/kernel/setup_64.c, the standard_io_resources array is needlessly defined as global. This patch makes this variable static. This patch was successfully build-tested using the defconfig for x86_64. Runtime test was performed by booting a 64-bit x86 box up to the shell prompt. Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: remove unused function amd_init_cpu()Dmitri Vorobiev
There are no users for the function amd_init_cpu() defined in arch/x86/kernel/cpu/amd.c. This patch removes this routine. This patch was build-tested using defconfigs for i386 and x86_64, and a few randconfig instances. Runtime tests were performed by booting 32- and 64-bit x86 boxen up to the shell prompt. Signed-off-by: Dmitri Vorobiev <dmitri.vorobiev@gmail.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86-64: extend MCE CPU quirk handlingJan Beulich
At least on my Barcelona, I see MCE log entries after cold boot caused by BIOS not properly clearing the respective registers. Therefore, this patch extends the workaround to families 0x10 and 0x11 (the latter just for completeness, I have nothing to verify this against). At the same time, provide a way to make these entries visible via the 'mce=bootlog' command line option even on these machines. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26i386: fix signal type for iret exceptionJan Beulich
.. since it uses ILL_BADSTK (which is meaningless in the context of SIGSEGV). Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86: fix watchdog ops for CoreDuoJan Beulich
There apparently was an unnoticed conflict between an earlier patch to this file and mine (d1e084746b0e5806e6345ab31c5b370f8dee2b23), which I noticed only now. I suppose a change like the one below (untested) is needed; I didn't get any response on a confirmation request for this from the submitter of the first patch. The issue is the writing of the 'checkbit' member at the end of setup_intel_arch_watchdog(), which my patch made go to intel_arch_wd_ops rather than wd_ops. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26i386: fix asm constraint in do_IRQ()Jan Beulich
Two prior changes resulted in the "ecx" clobber being lost. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86 PAT: decouple from nonpromisc devmemIngo Molnar
Linus pointed it out that PAT should not depend on NONPROMISC_DEVMEM. Also make PAT non-default. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-26x86 PAT: tone down debugging messagesIngo Molnar
Linus reported these excessive debug printouts: > Overlap at 0xe0300000-0xe0400000 > Overlap at 0xe0300000-0xe0380000 > Overlap at 0xe0300000-0xe0400000 > Overlap at 0xe0300000-0xe0400000 > Overlap at 0xe0300000-0xe0400000 > Overlap at 0xe0300000-0xe0400000 > Overlap at 0xe0300000-0xe0400000 turn that into a pr_debug(). Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-25Merge branch 'master' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc * 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (49 commits) [POWERPC] Add zImage.iseries to arch/powerpc/boot/.gitignore [POWERPC] bootwrapper: fix build error on virtex405-head.S [POWERPC] 4xx: Fix 460GT support to not enable FPU [POWERPC] 4xx: Add NOR FLASH entries to Canyonlands and Glacier dts [POWERPC] Xilinx: of_serial support for Xilinx uart 16550. [POWERPC] Xilinx: boot support for Xilinx uart 16550. [POWERPC] celleb: Add support for PCI Express [POWERPC] celleb: Move miscellaneous files for Beat [POWERPC] celleb: Move a file for SPU on Beat [POWERPC] celleb: Move files for Beat mmu and iommu [POWERPC] celleb: Move files for Beat hvcall interfaces [POWERPC] celleb: Move the SCC related code for celleb [POWERPC] celleb: Move the files for celleb base support [POWERPC] celleb: Consolidate io-workarounds code [POWERPC] cell: Generalize io-workarounds code [POWERPC] Add CONFIG_PPC_PSERIES_DEBUG to enable debugging for platforms/pseries [POWERPC] Convert from DBG() to pr_debug() in platforms/pseries/ [POWERPC] Register udbg console early on pseries LPAR [POWERPC] Mark udbg console as CON_ANYTIME, ie. callable early in boot [POWERPC] Set udbg_console index to 0 ...
2008-04-25Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-pat * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-x86-pat: generic: add ioremap_wc() interface wrapper /dev/mem: make promisc the default pat: cleanups x86: PAT use reserve free memtype in mmap of /dev/mem x86: PAT phys_mem_access_prot_allowed for dev/mem mmap x86: PAT avoid aliasing in /dev/mem read/write devmem: add range_is_allowed() check to mmap of /dev/mem x86: introduce /dev/mem restrictions with a config option
2008-04-25Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-xen-next * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/x86/linux-2.6-xen-next: (52 commits) xen: add balloon driver xen: allow compilation with non-flat memory xen: fold xen_sysexit into xen_iret xen: allow set_pte_at on init_mm to be lockless xen: disable preemption during tlb flush xen pvfb: Para-virtual framebuffer, keyboard and pointer driver xen: Add compatibility aliases for frontend drivers xen: Module autoprobing support for frontend drivers xen blkfront: Delay wait for block devices until after the disk is added xen/blkfront: use bdget_disk xen: Make xen-blkfront write its protocol ABI to xenstore xen: import arch generic part of xencomm xen: make grant table arch portable xen: replace callers of alloc_vm_area()/free_vm_area() with xen_ prefixed one xen: make include/xen/page.h portable moving those definitions under asm dir xen: add resend_irq_on_evtchn() definition into events.c Xen: make events.c portable for ia64/xen support xen: move events.c to drivers/xen for IA64/Xen support xen: move features.c from arch/x86/xen/features.c to drivers/xen xen: add missing definitions in include/xen/interface/vcpu.h which ia64/xen needs ...
2008-04-25Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6Linus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc-2.6: [SPARC64]: Wrap SMP IPIs with irq_enter()/irq_exit(). [SPARC64]: Fix args to 64-bit sys_semctl() via sys_ipc().
2008-04-25Update .gitignore filesMatthew Wilcox
Add some autogenerated files to various .gitignore files Signed-off-by: Matthew Wilcox <willy@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2008-04-25x86: harden kernel code patchingIngo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-25x86: clean up text_poke()Mathieu Desnoyers
Clean up the codepath, remove alignment restrictions and do sanity checking of the end result, to make sure we patched the right site. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-25x86: fix text_poke()Jiri Slaby
kernel_text_address returns true even for modules which is not wanted in text_poke. Use core_kernel_text instead. This is a regression introduced in e587cadd8f47e202a30712e2906a65a0606d5865 which caused occasionaly crashes after suspend/resume. Signed-off-by: Jiri Slaby <jirislaby@gmail.com> CC: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> CC: Andi Kleen <andi@firstfloor.org> CC: pageexec@freemail.hu CC: H. Peter Anvin <hpa@zytor.com> CC: Jeremy Fitzhardinge <jeremy@goop.org> Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-25x86: remove set_fixmap() warningIngo Molnar
set_fixmap()+clear_fixmap() is safe. Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-25x86: make __set_fixmap() non-initIngo Molnar
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2008-04-25[SPARC64]: Wrap SMP IPIs with irq_enter()/irq_exit().David S. Miller
Otherwise all sorts of bad things can happen, including spurious softlockup reports. Other platforms have this same bug, in one form or another, just don't see the issue because they don't sleep as long as sparc64 can in NOHZ. Thanks to some brilliant debugging by Peter Zijlstra. Signed-off-by: David S. Miller <davem@davemloft.net>
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