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2007-10-16Merge ssh://master.kernel.org/pub/scm/linux/kernel/git/sam/kbuildLinus Torvalds
* ssh://master.kernel.org/pub/scm/linux/kernel/git/sam/kbuild: x86: fix boot error introduced by kbuild
2007-10-16Merge branch 'release' of ↵Linus Torvalds
ssh://master.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of ssh://master.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] Fix build for CONFIG_SMP=n
2007-10-16x86: fix boot error introduced by kbuildSam Ravnborg
x86 uses target specific assignment of EXTRA_AFLAGS, EXTRA_CFLAGS - this caused troubles with introducing asflags-y, ccflags-y. Fixed the target specific assignments in arch/x86/boot/Makefile and auditted the rest of the kernel for similar usage. Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
2007-10-16[IA64] Fix build for CONFIG_SMP=nTony Luck
d5a7430ddcdb598261d70f7eb1bf450b5be52085 missed a spot where we use cpu_sibling_map and cpu_core_map. These don't exist on a uni-processor build. Wrap #ifdef CONFIG_SMP ... #endif around it. Signed-off-by: Tony Luck <tony.luck@intel.com>
2007-10-16Update PowerPC vmemmap code for 1TB segmentsAnton Blanchard
htab_bolt_mapping takes another argument now the 1TB code has been merged. Update vmemmap_populate to match. Signed-off-by: Anton Blanchard <anton@samba.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16Merge git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuildLinus Torvalds
* git://git.kernel.org/pub/scm/linux/kernel/git/sam/kbuild: (40 commits) kbuild: introduce ccflags-y, asflags-y and ldflags-y kbuild: enable 'make CPPFLAGS=...' to add additional options to CPP kbuild: enable use of AFLAGS and CFLAGS on commandline kbuild: enable 'make AFLAGS=...' to add additional options to AS kbuild: fix AFLAGS use in h8300 and m68knommu kbuild: check for wrong use of CFLAGS kbuild: enable 'make CFLAGS=...' to add additional options to CC kbuild: fix up CFLAGS usage kbuild: make modpost detect unterminated device id lists kbuild: call export_report from the Makefile kbuild: move Kai Germaschewski to CREDITS kconfig/menuconfig: distinguish between selected-by-another options and comments kconfig: tristate choices with mixed tristate and boolean values include/linux/Kbuild: remove duplicate entries kbuild: kill backward compatibility checks kbuild: kill EXTRA_ARFLAGS kbuild: fix documentation in makefiles.txt kbuild: call make once for all targets when O=.. is used kbuild: pass -g to assembler under CONFIG_DEBUG_INFO kbuild: update _shipped files for kconfig syntax cleanup ... Fix up conflicts in arch/um/sys-{x86_64,i386}/Makefile manually.
2007-10-16Merge branch 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linusLinus Torvalds
* 'upstream' of git://ftp.linux-mips.org/pub/scm/upstream-linus: [MIPS] Increase cp0 compare clockevent min_delta_ns from 0x30 to 0x300. [MIPS] Cache: Provide more information on cache policy on bootup. [MIPS] Fix aliasing bug in copy_user_highpage, take 2. [MIPS] VPE loader: convert from struct class_ device to struct device [MIPS] MIPSsim: Fix booting from NFS root [MIPS] Alchemy: Get rid of au1xxx_irq_map_t. [MIPS] Alchemy: Get rid of au_ffz(). [MIPS] Alchemy: Get rid of au_ffs(). [MIPS] Alchemy: cleanup interrupt code. [MIPS] Lasat: Fix build by conversion to irq_cpu.c. [MIPS] Lasat: Add #ifndef ... #endif include warpper to lasatint.h. [MIPS] IP22: Enable -Werror. [MIPS] IP22: Fix warning. [MIPS] IP22: Complain if requesting the front panel irq failed. [MIPS] vmlinux.lds.S: Handle KPROBES_TEXT. [MIPS] vmlinux.lds.S: Fix handling of .notes in final link. [MIPS] vmlinux.lds.S: Remove duplicate comment. [MIPS] MSP71XX: Add workarounds file. [MIPS] IP32: Fix build by conversion to irq_cpu.c.
2007-10-16[MIPS] Increase cp0 compare clockevent min_delta_ns from 0x30 to 0x300.Ralf Baechle
Extremly low values are of dubious usefulness anyway but in this case they actually were killing Qemu which simply wasn't able to complete mips_next_event() within 0x30 100MHz cycles even on fast hosts. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-16[MIPS] Cache: Provide more information on cache policy on bootup.Ralf Baechle
This should help making bug reports for the gadzillion of cores with all their configuration and synthesis options more useful. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-16[MIPS] Fix aliasing bug in copy_user_highpage, take 2.Ralf Baechle
Turns out b868868ae0f7272228c95cc760338ffe35bb739d wasn't quite right. When called for a page that isn't marked dirty it would artificially create an alias instead of doing the obvious thing and access the page via KSEG0. The same issue also exists in copy_to_user_page and copy_from_user_page which was causing the machine to die under rare circumstances for example when running ps if the BUG_ON() assertion added by the earlier fix was getting triggered. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-16[MIPS] VPE loader: convert from struct class_ device to struct deviceKay Sievers
Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-16[MIPS] MIPSsim: Fix booting from NFS rootThiemo Seufer
MIPSsim probably doesn't have any sort of environment, but writing a zero in it kills even the compiled in command line. This prevents booting via NFS root. Signed-Off-By: Thiemo Seufer <ths@networkno.de> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-16[MIPS] Alchemy: Get rid of au1xxx_irq_map_t.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-16[MIPS] Alchemy: Get rid of au_ffs().Ralf Baechle
It was plain a bad idea ... Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-16[MIPS] Alchemy: cleanup interrupt code.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-16[MIPS] Lasat: Fix build by conversion to irq_cpu.c.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-16[MIPS] IP22: Enable -Werror.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-16[MIPS] IP22: Fix warning.Ralf Baechle
CC arch/mips/sgi-ip22/ip22-berr.o arch/mips/sgi-ip22/ip22-berr.c: In function 'ip22_be_interrupt': arch/mips/sgi-ip22/ip22-berr.c:100: warning: passing argument 2 of 'die_if_kernel' discards qualifiers from pointer target type Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-16[MIPS] IP22: Complain if requesting the front panel irq failed.Ralf Baechle
This fixes the warning: CC arch/mips/sgi-ip22/ip22-reset.o arch/mips/sgi-ip22/ip22-reset.c: In function 'reboot_setup': arch/mips/sgi-ip22/ip22-reset.c:239: warning: ignoring return value of 'request_irq', declared with attribute warn_unused_result Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-16[MIPS] vmlinux.lds.S: Handle KPROBES_TEXT.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-16[MIPS] vmlinux.lds.S: Fix handling of .notes in final link.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-16[MIPS] vmlinux.lds.S: Remove duplicate comment.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-16[MIPS] IP32: Fix build by conversion to irq_cpu.c.Ralf Baechle
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2007-10-16Merge branch 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-blockLinus Torvalds
* 'for-linus' of git://git.kernel.dk/data/git/linux-2.6-block: (63 commits) Fix memory leak in dm-crypt SPARC64: sg chaining support SPARC: sg chaining support PPC: sg chaining support PS3: sg chaining support IA64: sg chaining support x86-64: enable sg chaining x86-64: update pci-gart iommu to sg helpers x86-64: update nommu to sg helpers x86-64: update calgary iommu to sg helpers swiotlb: sg chaining support i386: enable sg chaining i386 dma_map_sg: convert to using sg helpers mmc: need to zero sglist on init Panic in blk_rq_map_sg() from CCISS driver remove sglist_len remove blk_queue_max_phys_segments in libata revert sg segment size ifdefs Fixup u14-34f ENABLE_SG_CHAINING qla1280: enable use_sg_chaining option ...
2007-10-16powerpc32 vDSO: linker script indentationRoland McGrath
This cleans up the formatting in the vDSO linker script, mostly just the use of whitespace. It's intended to approximate the kernel standard conventions for indenting C, treating elements of the linker script about like initialized variable definitions. Signed-off-by: Roland McGrath <roland@redhat.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16powerpc64 vDSO: linker script indentationRoland McGrath
This cleans up the formatting in the vDSO linker script, mostly just the use of whitespace. It's intended to approximate the kernel standard conventions for indenting C, treating elements of the linker script about like initialized variable definitions. Signed-off-by: Roland McGrath <roland@redhat.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16SH vDSO: linker script indentationRoland McGrath
This cleans up the formatting in the vDSO linker script, mostly just the use of whitespace. It's intended to approximate the kernel standard conventions for indenting C, treating elements of the linker script about like initialized variable definitions. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16ia64 vDSO: linker script indentationRoland McGrath
This cleans up the formatting in the vDSO linker script, mostly just the use of whitespace. It's intended to approximate the kernel standard conventions for indenting C, treating elements of the linker script about like initialized variable definitions. Signed-off-by: Roland McGrath <roland@redhat.com> Cc: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16s3c2410fb: removes lcdcon1 register value from s3c2410fb_displayKrzysztof Helt
This patch removes lcdcon1 register field from the s3c2410fb_display as all bits are calculated from other fields. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16s3c2410fb: adds pixclock to s3c2410fb_displayKrzysztof Helt
This patch adds pixelclock field to the s3c2410fb_display structure and make use of it in the driver. The Bast machine defined 9 modes but pixclock and margin values are defined only for the 640x480 modes so I removed other modes. This patch also fixes wrong display type constant for the SMDK2440 board. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16s3c2410fb: remove lcdcon2 and lcdcon3 register fieldsKrzysztof Helt
This patch removes unused lcdcon2 and lcdcon3 register value from the s3c2410fb_display structure. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16s3c2410fb: add pulse length fields to s3c2410fb_displayKrzysztof Helt
This patch adds synchronization pulse lenght fields to the s3c2410fb_display structure and makes use of them in the driver. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16s3c2410fb: add vertical margins fields to s3c2410fb_displayKrzysztof Helt
This patch adds vertical margins values to all s3c24xx platform. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16s3c2410fb: remove lcdcon3 register from s3c2410fb_displayKrzysztof Helt
This patch removes unused lcdcon3 register from the s3c2410fb_display structure. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16s3c2410fb: add margin fields to s3c2410fb_displayKrzysztof Helt
This patch adds margins fields to the s3c2410fb_display structure. It also sets display type and horizontal margins in all platform files that use the s3c2410fb driver. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16s3c2410fb: multi-display supportKrzysztof Helt
This patch adds a new structure to describe and handle more than one panel (display mode) for the s3c2410 framebuffer. This structure is added after the pxafb driver. Signed-off-by: Krzysztof Helt <krzysztof.h1@wp.pl> Signed-off-by: Antonino Daplas <adaplas@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16rtc: make rtc-ds1742 driver hotplug-awareAtsushi Nemoto
The rtc-ds1742 platform driver name doesn't match its module name, which might prevents it from properly hotplugging. There is only two in-tree user of its driver, which are fixed by this patch too. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Cc: Alessandro Zummo <a.zummo@towertech.it> Cc: David Brownell <david-b@pacbell.net> Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16kprobes: support kretprobe blacklistMasami Hiramatsu
Introduce architecture dependent kretprobe blacklists to prohibit users from inserting return probes on the function in which kprobes can be inserted but kretprobes can not. This patch also removes "__kprobes" mark from "__switch_to" on x86_64 and registers "__switch_to" to the blacklist on x86-64, because that mark is to prohibit user from inserting only kretprobe. Signed-off-by: Masami Hiramatsu <mhiramat@redhat.com> Cc: Prasanna S Panchamukhi <prasanna@in.ibm.com> Acked-by: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16V850: cleanup struct irqaction initializersThomas Gleixner
Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Miles Bader <miles@gnu.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16uml: definitively kill subprocesses on panicLepton Wu
In a stock 2.6.22.6 kernel, poweroff a user mode linux guest (2.6.22.6 running in skas0 mode) will halt the host linux. I think the reason is the kernel thread abort because of a bug. Then the sys_reboot in process of user mode linux guest is not trapped by the user mode linux kernel and is executed by host. I think it is better to make sure all of our children process to quit when user mode linux kernel abort. [ jdike - the kernel process needs to ignore SIGTERM, plus the waitpid/kill loop is needed to make sure that all of our children are dead before the kernel exits ] Signed-off-by: Lepton Wu <ytht.net@gmail.com> Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16uml: arch/um/drivers formattingJeff Dike
Style fixes for the rest of the drivers. arch/um/drivers should be pretty CodingStyle-compliant now. Except for the ubd driver, which will have to be treated separately. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16uml: fix stub address calculationsJeff Dike
The calculation of CONFIG_STUB_CODE and CONFIG_STUB_DATA didn't take into account anything but 3G/1G and 2G/2G, leaving the other vmsplits out in the cold. I'd rather not duplicate the four known host vmsplit cases for each of these symbols. I'd also like to calculate them based on the highest userspace address. The Kconfig language seems not to allow calculation of hex constants, so I moved this to as-layout.h. CONFIG_STUB_CODE, CONFIG_STUB_DATA, and CONFIG_STUB_START are now gone. In their place are STUB_CODE, STUB_DATA, and STUB_START in as-layout.h. i386 and x86_64 seem to differ as to whether an unadorned constant is an int or a long, so I cast them to unsigned long so they can be printed consistently. However, they are also used in stub.S, where C types don't work so well. So, there are ASM_ versions of these constants for use in stub.S. I also ifdef-ed the non-asm-friendly portion of as-layout.h. With this in place, most of the rest of this patch is changing CONFIG_STUB_* to STUB_*, except in stub.S, where they are changed to ASM_STUB_*. defconfig has the old symbols deleted. I also print these addresses out in case there is any problem mapping them on the host. The two stub.S files had some trailing whitespace, so that is cleaned up here. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16uml: correctly handle skb allocation failuresJeff Dike
Handle memory allocation failures when reading packets. We have to read something from the host, even if we can't allocate any memory. If we don't, the host side of the device may fill up and stop delivering interrupts because no new packets can be queued. A single sk_buff is allocated whenever an MTU is seen which is larger than any seen earlier. This is used to read packets if there is a memory allocation failure. The large MTU check is done from eth_configure, which is called when a interface is added to the system. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16uml: network driver MTU cleanupsJeff Dike
A bunch of MTU-related cleanups in the network code. First, there is the addition of the notion of a maximally-sized packet, which is the MTU plus headers. This is used to size the skb that will receive a packet. This allows ether_adjust_skb to go away, as it was used to resize the skb after it was allocated. Since the skb passed into the low-level read routine is no longer resized, and possibly reallocated, there, they (and the write routines) don't need to get an sk_buff **. They just need the sk_buff * now. The callers of ether_adjust_skb still need to do the skb_put, so that's now inlined. The MAX_PACKET definitions in most of the drivers are gone. The set_mtu methods were all the same and did nothing, so they can be removed. The ethertap driver had a typo which doubled the size of the packet rather than adding two bytes to it. It also wasn't defining its setup_size, causing a zero-byte kmalloc and crash when the invalid pointer returned from kmalloc was dereferenced. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16uml: network formattingJeff Dike
Style and other non-functional changes in the UML networking code, including include tidying style violations copyright updates printks getting severities userspace code calling libc directly rather than using the os_* wrappers There's also a exit path cleanup in the pcap driver. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16uml: use *SEC_PER_*SEC constantsJeff Dike
There are various uses of powers of 1000, plus the odd BILLION constant in the time code. However, there are perfectly good definitions of *SEC_PER_*SEC in linux/time.h which can be used instaed. These are replaced directly in kernel code. Userspace code imports those constants as UM_*SEC_PER_*SEC and uses these. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16uml: eliminate SIGALRMJeff Dike
Now that ITIMER_REAL is no longer used, there is no need for any use of SIGALRM whatsoever. This patch removes all mention of it. In addition, real_alarm_handler took a signal argument which is now always SIGVTALRM. So, that is gone. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16uml: time build fixJeff Dike
Put back an implementation of timeval_to_ns in arch/um/os-Linux/time.c. tglx pointed out in his review of tickless support that there was a perfectly good implementation of it in linux/time.h. The problem is that this is userspace code which can't pull in kernel headers and there doesn't seem to be a libc version. So, I'm copying the version from linux/time.h rather than resurrecting my version. This causes some declaration changes as it now returns a signed value rather than an unsigned value. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16uml: eliminate interrupts in the idle loopJeff Dike
Now, the idle loop now longer needs SIGALRM firing - it can just sleep for the requisite amount of time and fake a timer interrupt when it finishes. Any use of ITIMER_REAL now goes away. disable_timer only turns off ITIMER_VIRTUAL. switch_timers is no longer needed, so it, and all calls, goes away. disable_timer now returns the amount of time remaining on the timer. default_idle uses this to tell idle_sleep how long to sleep. idle_sleep will call alarm_handler if nanosleep returns 0, which is the case if it didn't return early due to an interrupt. Otherwise, it just returns. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2007-10-16uml: tickless supportJeff Dike
Enable tickless support. CONFIG_TICK_ONESHOT and CONFIG_NO_HZ are enabled. itimer_clockevent gets CLOCK_EVT_FEAT_ONESHOT and an implementation of .set_next_event. CONFIG_UML_REAL_TIME_CLOCK goes away because it only makes sense when there is a clock ticking away all the time. timer_handler now just calls do_IRQ once without trying to figure out how many ticks to emulate. The idle loop now needs to turn ticking on and off. Userspace ticks keep happening as usual. However, the userspace loop keep track of when the next wakeup should happen and suppresses process ticks until that happens. Signed-off-by: Jeff Dike <jdike@linux.intel.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>