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* x86_64: Add vDSO for x86-64 with gettimeofday/clock_gettime/getcpuAndi Kleen2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This implements new vDSO for x86-64. The concept is similar to the existing vDSOs on i386 and PPC. x86-64 has had static vsyscalls before, but these are not flexible enough anymore. A vDSO is a ELF shared library supplied by the kernel that is mapped into user address space. The vDSO mapping is randomized for each process for security reasons. Doing this was needed for clock_gettime, because clock_gettime always needs a syscall fallback and having one at a fixed address would have made buffer overflow exploits too easy to write. The vdso can be disabled with vdso=0 It currently includes a new gettimeofday implemention and optimized clock_gettime(). The gettimeofday implementation is slightly faster than the one in the old vsyscall. clock_gettime is significantly faster than the syscall for CLOCK_MONOTONIC and CLOCK_REALTIME. The new calls are generally faster than the old vsyscall. Advantages over the old x86-64 vsyscalls: - Extensible - Randomized - Cleaner - Easier to virtualize (the old static address range previously causes overhead e.g. for Xen because it has to create special page tables for it) Weak points: - glibc support still to be written The VM interface is partly based on Ingo Molnar's i386 version. Includes compile fix from Joachim Deguara Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* x86: Support __attribute__((__cold__)) in gcc 4.3Andi Kleen2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | gcc 4.3 supports a new __attribute__((__cold__)) to mark functions cold. Any path directly leading to a call of this function will be unlikely. And gcc will try to generate smaller code for the function itself. Please use with care. The code generation advantage isn't large and in most cases it is not worth uglifying code with this. This patch marks some common error functions like panic(), printk() as cold. This will longer term make many unlikely()s unnecessary, although we can keep them for now for older compilers. BUG is not marked cold because there is currently no way to tell gcc to mark a inline function told. Also all __init and __exit functions are marked cold. With a non -Os build this will tell the compiler to generate slightly smaller code for them. I think it currently only uses less alignments for labels, but that might change in the future. One disadvantage over *likely() is that they cannot be easily instrumented to verify them. Another drawback is that only the latest gcc 4.3 snapshots support this. Unfortunately we cannot detect this using the preprocessor. This means older snapshots will fail now. I don't think that's a problem because they are unreleased compilers that nobody should be using. gcc also has a __hot__ attribute, but I don't see any sense in using this in the kernel right now. But someday I hope gcc will be able to use more aggressive optimizing for hot functions even in -Os, if that happens it should be added. Includes compile fix from Thomas Gleixner. Cc: Jan Hubicka <jh@suse.cz> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* i386: Move all simple string operations out of lineAndi Kleen2007-07-21
| | | | | | | | | | | | | | | | | The compiler generally generates reasonable inline code for the simple cases and for the rest it's better for code size for them to be out of line. Also there they can be potentially optimized more in the future. In fact they probably should be in a .S file because they're all pure assembly, but that's for another day. Also some code style cleanup on them while I was on it (this seems to be the last untouched really early Linux code) This saves ~12k text for a defconfig kernel with gcc 4.1. Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* x86_64: Always use builtin memcpy on gcc 4.3Andi Kleen2007-07-21
| | | | | | | | | Jan asked to always use the builtin memcpy on gcc 4.3 mainline because it should generate better code than the old macro. Let's try it. Cc: Jan Hubicka <jh@suse.cz> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* x86_64: Use string instruction memcpy/memset on AMD Fam10Andi Kleen2007-07-21
| | | | | Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* x86_64: various cleanups in NUMA scan nodeDavid Rientjes2007-07-21
| | | | | | | | | | | | | | | | | | | | | In acpi_scan_nodes(), we immediately return -1 if acpi_numa <= 0, meaning we haven't detected any underlying ACPI topology or we have explicitly disabled its use from the command-line with numa=noacpi. acpi_table_print_srat_entry() and acpi_table_parse_srat() are only referenced within drivers/acpi/numa.c, so we can mark them as static and remove their prototypes from the header file. Likewise, pxm_to_node_map[] and node_to_pxm_map[] are only used within drivers/acpi/numa.c, so we mark them as static and remove their externs from the header file. The automatic 'result' variable is unused in acpi_numa_init(), so it's removed. Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* x86_64: Use LOCAL_DISTANCE and REMOTE_DISTANCE in x86_64 ACPI codeDavid Rientjes2007-07-21
| | | | | | | | Use LOCAL_DISTANCE and REMOTE_DISTANCE in x86_64 ACPI code Signed-off-by: David Rientjes <rientjes@google.com> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* x86_64: Report the pending irq if available in smp_affinityAndi Kleen2007-07-21
| | | | | | | | | | Otherwise smp_affinity would only update after the next interrupt on x86 systems. Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* x86_64: Don't rely on a unique IO-APIC IDAndi Kleen2007-07-21
| | | | | | | | | | | | | | Linux 64bit only uses the IO-APIC ID as an internal cookie. In the future there could be some cases where the IO-APIC IDs are not unique because they share an 8 bit space with CPUs and if there are enough CPUs it is difficult to get them that. But Linux needs the io apic ID internally for its data structures. Assign unique IO APIC ids on table parsing. TBD do for 32bit too Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* x86_64: asm/ptrace.h needs linux/compiler.hJean Delvare2007-07-21
| | | | | | | | | On x86_64, <asm/ptrace.h> uses __user but doesn't include <linux/compiler.h>. This could lead to build failures. Signed-off-by: Jean Delvare <khali@linux-fr.org> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* x86: Always flush pages in change_page_attrAndi Kleen2007-07-21
| | | | | | | | | | | | | | | Fix a bug introduced with the CLFLUSH changes: we must always flush pages changed in cpa(), not just when they are reverted. Reenable CLFLUSH usage with that now (it was temporarily disabled for .22) Add some BUG_ONs Contains fixes from Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* i386: Update defconfigAndi Kleen2007-07-21
| | | | | Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* x86_64: Update defconfigAndi Kleen2007-07-21
| | | | | Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* atmel_lcdfb: use spare bits in 32bpp mode as alpha channelHaavard Skinnemoen2007-07-21
| | | | | | | | | | | Set var->transp.offset and var->transp.length in 32bpp mode to indicate that the 8 otherwise unused bits can be used for transparency. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Signed-off-by: Nicolas Ferre <nicolas.ferre@rfo.atmel.com> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rivafb_setup() must be __devinitAdrian Bunk2007-07-21
| | | | | | | | | WARNING: drivers/built-in.o(.text+0x57106): Section mismatch: reference to .init.text:rivafb_setup (between 'rivafb_init' and 'nv3Busy') Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* atmel_lcdfb: Fix STN LCD supportNicolas Ferre2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes STN LCD support for the atmel_lcdfb framebuffer driver. This patch is the result of a work from Jan Altenberg and has been tested on a Hitachi SP06Q002 on at91sam9261ek. It adds a Kconfig switch that enables the proper LCD in the board configuration file (STN or TFT). The switch is used in arch/arm/mach-at91/at91sam9261_devices.c & board-sam9261ek.c as an example. This patch includes the "Fix wrong line_length calculation" little one from Jan and Haavard (submitted earlier). AT91 platform informations are directly submitted trough the at91 maintainer, here : http://article.gmane.org/gmane.linux.kernel/543158 Signed-off-by: Nicolas Ferre <nicolas.ferre@rfo.atmel.com> Cc: "Antonino A. Daplas" <adaplas@gmail.com> Cc: Jan Altenberg <jan.altenberg@linutronix.de> Cc: Patrice Vilchez <patrice.vilchez@rfo.atmel.com> Cc: Andrew Victor <andrew@sanpeople.com> Cc: Haavard Skinnemoen <hskinnemoen@atmel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: add support for STK17TA8 chipThomas Hommel2007-07-21
| | | | | | | | | | | | | | This patch adds support for the Simtek STK17TA8 timekeeping chip. The STK17TA8 is quite similar to the DS1553, but differs in register layout and in various control bits in the registers. I chose to make this a new driver to avoid confusion in the code and to not get lost in #ifdefs. Signed-off-by: Thomas Hommel <thomas.hommel@gefanuc.com> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: update and use the MAX6900 century byteDale Farnsworth2007-07-21
| | | | | | | | | | | | We now read and write the century byte in the max6900 chip. We probably don't need to do so on Linux-only system, but it's necessary when the chip is shared by another OS that uses the century byte. Signed-off-by: Dale Farnsworth <dale@farnsworth.org> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc kconfig: point out need for static linkageDavid Brownell2007-07-21
| | | | | | | | | | | | Various people have expressed surprise that their modular RTC drivers don't seem to work for initializing the system time at boot. To help avoid such unpleasantness, make the Kconfig text point out that the driver probably needs to be statically linked. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* rtc: do not return void valueAtsushi Nemoto2007-07-21
| | | | | | | | | | | | | This patch fixes these sparse warnings: drivers/rtc/rtc-ds1742.c:265:2: warning: returning void-valued expression drivers/rtc/rtc-ds1553.c:409:2: warning: returning void-valued expression Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Cc: David Brownell <david-b@pacbell.net> Cc: Alessandro Zummo <a.zummo@towertech.it> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Use menuconfig objects: ISDN/GigasetJan Engelhardt2007-07-21
| | | | | | | | | | | Change Kconfig objects from "menu, config" into "menuconfig" so that the user can disable the whole feature without having to enter the menu first. Signed-off-by: Jan Engelhardt <jengelh@gmx.de> Cc: Tilman Schmidt <tilman@imap.cc> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Use menuconfig objects: ISDNJan Engelhardt2007-07-21
| | | | | | | | | | | Unclutter the ISDN menu a tiny bit by moving ISDN4Linux and the CAPI2.0 layers into their own menu. Signed-off-by: Jan Engelhardt <jengelh@gmx.de> Cc: Tilman Schmidt <tilman@imap.cc> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Use menuconfig objects - CONFIG_ISDN_I4LTilman Schmidt2007-07-21
| | | | | | | | | | | | | Remove a menu statement and several dependencies from the Kconfig files in the drivers/isdn tree as they have become unnecessary by the transformation of CONFIG_ISDN from "menu, config" into "menuconfig". (Modified version of a patch originally proposed by Jan Engelhardt.) Signed-off-by: Tilman Schmidt <tilman@imap.cc> Cc: Jan Engelhardt <jengelh@computergmbh.de> Acked-by: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* spi.c:scan_boardinfo() mustn't be __init_or_moduleAdrian Bunk2007-07-21
| | | | | | | | | WARNING: drivers/built-in.o(.text+0x889735): Section mismatch: reference to .init.text:scan_boardinfo (between 'spi_register_master' and '__unregister') Signed-off-by: Adrian Bunk <bunk@stusta.de> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* spufs: make signal-notification files readonly for NOSCHED contextsJeremy Kerr2007-07-21
| | | | | | | | | | | | Reading from the signal{1,2} files requires a spu_acquire_saved, so make these files write-only for contexts created with SPU_CREATE_NOSCHED. Signed-off-by: Jeremy Kerr <jk@ozlabs.org> Acked-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ps3fb: Set FBINFO_READS_FAST to speed up text console scrollingGeert Uytterhoeven2007-07-21
| | | | | | | | | | | | ps3fb: Set FBINFO_READS_FAST to speed up text console scrolling (on average 50%, according to my tests) Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: Geoff Levand <geoffrey.levand@am.sony.com> Cc: Paul Mackerras <paulus@samba.org> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ps3fb: Shrink default virtual frame buffer size from 18 to 9 MiBGeert Uytterhoeven2007-07-21
| | | | | | | | | | | | | | ps3fb: Shrink the default virtual frame buffer size from 18 to 9 MiB, as nobody really uses the double buffering feature and Linux can use an additional 9 MiB. It can still be overridden on the kernel command line using `ps3fb=18M'. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: Geoff Levand <geoffrey.levand@am.sony.com> Cc: Paul Mackerras <paulus@samba.org> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ps3fb: Enable VT_HW_CONSOLE_BINDING for proper kexecGeert Uytterhoeven2007-07-21
| | | | | | | | | | | | ps3fb: VT_HW_CONSOLE_BINDING must be enabled to make console unbinding work, which is needed to give up all hypervisor resources before reboot or kexec. Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: Geoff Levand <geoffrey.levand@am.sony.com> Cc: Paul Mackerras <paulus@samba.org> Cc: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* PS3: Fix build with 32-bit toolchainsGeoff Levand2007-07-21
| | | | | | | | | | | | | The PS3 bootwrapper files use instructions only available on 64-bit CPUs. Add the code generation directive '.machine "ppc64"' for toolchains configured for 32-bit CPUs. Signed-off-by: Geoff Levand <geoffrey.levand@am.sony.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ps3: FLASH ROM Storage DriverGeert Uytterhoeven2007-07-21
| | | | | | | | | | | | | | | | Add a FLASH ROM Storage Driver for the PS3: - Implemented as a misc character device driver - Uses a fixed 256 KiB buffer allocated from boot memory as the hypervisor requires the writing of aligned 256 KiB blocks Cc: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ps3: BD/DVD/CD-ROM Storage DriverGeert Uytterhoeven2007-07-21
| | | | | | | | | | | | | | | | Add a BD/DVD/CD-ROM Storage Driver for the PS3: - Implemented as a SCSI device driver - Uses software scatter-gather with a 64 KiB bounce buffer as the hypervisor doesn't support scatter-gather Cc: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* ps3: Disk Storage DriverGeert Uytterhoeven2007-07-21
| | | | | | | | | | | | | | | | | Add a Disk Storage Driver for the PS3: - Implemented as a block device driver with a dynamic major - Disk names (and partitions) are of the format ps3d%c(%u) - Uses software scatter-gather with a 64 KiB bounce buffer as the hypervisor doesn't support scatter-gather Cc: Geoff Levand <geoffrey.levand@am.sony.com> Signed-off-by: Geert Uytterhoeven <Geert.Uytterhoeven@sonycom.com> Acked-by: Jens Axboe <jens.axboe@oracle.com> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* powerpc: tlb_32.c build fixMariusz Kozlowski2007-07-21
| | | | | | | | | | | | | | | | | | allnoconfig results in this: CC arch/powerpc/mm/tlb_32.o In file included from include/asm/tlb.h:60, from arch/powerpc/mm/tlb_32.c:30: include/asm-generic/tlb.h: In function 'tlb_flush_mmu': include/asm-generic/tlb.h:76: error: implicit declaration of function 'release_pages' include/asm-generic/tlb.h: In function 'tlb_remove_page': include/asm-generic/tlb.h:105: error: implicit declaration of function 'page_cache_release' Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Documentation:reference notifiers.txt in freezing-of-tasks.txtOliver Neukum2007-07-21
| | | | | | | | | | | freezing-of-tasks.txt mentions firmware issues without mentioning the use of the new notifier API to overcome them. Here's an update. Signed-off-by: Oliver Neukum <oneukum@suse.de> Acked-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Nigel Cunningham <nigel@nigel.suspend2.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* slob: reduce list scanningMatt Mackall2007-07-21
| | | | | | | | | | | | | | | | | | | | The version of SLOB in -mm always scans its free list from the beginning, which results in small allocations and free segments clustering at the beginning of the list over time. This causes the average search to scan over a large stretch at the beginning on each allocation. By starting each page search where the last one left off, we evenly distribute the allocations and greatly shorten the average search. Without this patch, kernel compiles on a 1.5G machine take a large amount of system time for list scanning. With this patch, compiles are within a few seconds of performance of a SLAB kernel with no notable change in system time. Signed-off-by: Matt Mackall <mpm@selenic.com> Cc: Christoph Lameter <clameter@sgi.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* remove handle_mm_fault exportChristoph Hellwig2007-07-21
| | | | | | | | | | Now that arch/powerpc/platforms/cell/spufs/fault.c is always built in the kernel there is no need to export handle_mm_fault anymore. Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: Nick Piggin <nickpiggin@yahoo.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* i386: intel_cacheinfo.c:find_num_cache_leaves() should be __cpuinitAdrian Bunk2007-07-21
| | | | | | | | | | | | | WARNING: arch/i386/kernel/built-in.o(.text+0xb6a7): Section mismatch: reference to .init.text:find_num_cache_leaves (between 'init_intel_cacheinfo' and 'cache_shared_cpu_map_setup') It could be __init_refok, but gcc >= 4.0 anyway inlines it into the __cpuinit init_intel_cacheinfo(), and IMHO it's too small for "noinline __init". Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* i386: PIT stop only, when in periodic or oneshot modeThomas Gleixner2007-07-21
| | | | | | | | | | | | | The patch is necessary on one of my boxen, where programming the stop sequence twice leads to PIT malfunction. Sigh ! Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andi Kleen <ak@suse.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* NTP: move the cmos update code into ntp.cThomas Gleixner2007-07-21
| | | | | | | | | | | | | | | | i386 and sparc64 have the identical code to update the cmos clock. Move it into kernel/time/ntp.c as there are other architectures coming along with the same requirements. [akpm@linux-foundation.org: build fixes] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Chris Wright <chrisw@sous-sol.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: john stultz <johnstul@us.ibm.com> Cc: David Miller <davem@davemloft.net> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* hrtimer: speedup hrtimer_enqueueIngo Molnar2007-07-21
| | | | | | | | | | Speedup hrtimer_enqueue by evaluating the rbtree insertion result. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* highres: improve debug outputIngo Molnar2007-07-21
| | | | | | | | | | Add some more debug information to the hrtimer and clock events code. Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* tick management: spread timer interruptjohn stultz2007-07-21
| | | | | | | | | | | | | | After discussing w/ Thomas over IRC, it seems the issue is the sched tick fires on every cpu at the same time, causing extra lock contention. This smaller change, adds an extra offset per cpu so the ticks don't line up. This patch also drops the idle latency from 40us down to under 20us. Signed-off-by: john stultz <johnstul@us.ibm.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* clockevents: fix device replacementThomas Gleixner2007-07-21
| | | | | | | | | | | When a device is replaced by a better rated device, then the broadcast mode needs to be evaluated again. When the new device has no requirement for broadcasting, then the broadcast bits for the CPU must be cleared. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* clockevents: fix resume logicThomas Gleixner2007-07-21
| | | | | | | | | | | | | | | | | | | | We need to make sure, that the clockevent devices are resumed, before the tick is resumed. The current resume logic does not guarantee this. Add CLOCK_EVT_MODE_RESUME and call the set mode functions of the clock event devices before resuming the tick / oneshot functionality. Fixup the existing users. Thanks to Nigel Cunningham for tracking down a long standing thinko, which affected the jinxed VAIO. [akpm@linux-foundation.org: xen build fix] Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: john stultz <johnstul@us.ibm.com> Cc: Rusty Russell <rusty@rustcorp.com.au> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* clockevents: remove prototypes of removed functionsThomas Gleixner2007-07-21
| | | | | | | Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: john stultz <johnstul@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* revert "PIE randomization"Andrew Morton2007-07-21
| | | | | | | | | | | | | | | | | | | There are reports of this causing userspace failures (http://lkml.org/lkml/2007/7/20/421). Revert. Cc: Jan Kratochvil <honza@jikos.cz> Cc: Jiri Kosina <jkosina@suse.cz> Cc: Ingo Molnar <mingo@elte.hu> Cc: Roland McGrath <roland@redhat.com> Cc: Jakub Jelinek <jakub@redhat.com> Cc: Ulrich Kunitz <kune@deine-taler.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: "Bret Towe" <magnade@gmail.com> Cc: "Luck, Tony" <tony.luck@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* console: fix section mismatch warning in vgacon.cSam Ravnborg2007-07-21
| | | | | | | | | | | | | | | Fix following section mismatch warning: WARNING: vmlinux.o(.text+0x121e62): Section mismatch: reference to .init.text:__alloc_bootmem (between 'vgacon_startup' and 'vgacon_scrolldelta') Browsing the code it seems that vgacon_scrollback_startup() is only called during the init phase so the reference to the .init.text section is OK. Teach modpost not to warn using ___init_refok. Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Acked-by: "Antonino A. Daplas" <adaplas@pol.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* knfsd: fix typo in export display, print uid and gid as unsignedJ. Bruce Fields2007-07-21
| | | | | | | | | | For display purposes, treat uid's and gid's as unsigned ints for now. Also fix a typo. Signed-off-by: "J. Bruce Fields" <bfields@citi.umich.edu> Cc: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* i386: touch_nmi_watchdog() in print_trace_address()Konrad Rzeszutek2007-07-21
| | | | | | | | Prevent NMI watchdog triggering during long sysrq-T outputs. Cc: Andi Kleen <ak@suse.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* dm io: fix panic on large requestMilan Broz2007-07-21
| | | | | | | | | | | | | | | | | | | | | | | | | | | Flush workqueue before releasing bioset and mopools in dm-crypt. There can be finished but not yet released request. Call chain causing oops: run workqueue dec_pending bio_endio(...); <remove device request - remove mempool> mempool_free(io, cc->io_pool); This usually happens when cryptsetup create temporary luks mapping in the beggining of crypt device activation. When dm-core calls destructor crypt_dtr, no new request are possible. Signed-off-by: Milan Broz <mbroz@redhat.com> Cc: Chuck Ebbert <cebbert@redhat.com> Cc: Patrick McHardy <kaber@trash.net> Acked-by: Alasdair G Kergon <agk@redhat.com> Cc: Christophe Saout <christophe@saout.de> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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