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2010-03-06sdio: introduce API for special power management featuresNicolas Pitre
This patch series provides the core changes needed to allow SDIO cards to remain powered and active while the host system is suspended, and let them wake up the host system when needed. This is used to implement wake-on-lan with SDIO wireless cards at the moment. Patches to add that support to the libertas driver will be posted separately. This patch: Some SDIO cards have the ability to keep on running autonomously when the host system is suspended, and wake it up when needed. This however requires that the host controller preserve power to the card, and configure itself appropriately for wake-up. There is however 4 layers of abstractions involved: the host controller driver, the MMC core code, the SDIO card management code, and the actual SDIO function driver. To make things simple and manageable, host drivers must advertise their PM capabilities with a feature bitmask, then function drivers can query and set those features from their suspend method. Then each layer in the suspend call chain is expected to act upon those bits accordingly. [akpm@linux-foundation.org: fix typo in comment] Signed-off-by: Nicolas Pitre <nico@marvell.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06sdhci: improve sdhci sdhci_set_adma_desc() codeBen Dooks
sdhci_set_adma_desc() is using byte-writes to write data in a specified order into memory. Change to using __le16 for the two byte and __le32 for the four byte cases and use the cpu_to_{le16,le32} to do the conversion before writing. This will reduce the size of the code and the number of writes as we no longer need to chop the data up before writing. As an example on ARM S3C64XX SoC, in little-endian configuration: 000000d4 <sdhci_set_adma_desc>: - d8: e1a0c423 lsr ip, r3, #8 - dc: e1a0ec21 lsr lr, r1, #24 - e0: e1a04821 lsr r4, r1, #16 - e4: e1a05421 lsr r5, r1, #8 - e8: e1a06442 asr r6, r2, #8 - ec: e5c0c001 strb ip, [r0, #1] - f0: e5c0e007 strb lr, [r0, #7] - f4: e5c04006 strb r4, [r0, #6] - f8: e5c05005 strb r5, [r0, #5] - fc: e5c01004 strb r1, [r0, #4] - 100: e5c06003 strb r6, [r0, #3] - 104: e5c02002 strb r2, [r0, #2] - 108: e5c03000 strb r3, [r0] + d4: e5801004 str r1, [r0, #4] + d8: e1c030b0 strh r3, [r0] + dc: e1c020b2 strh r2, [r0, #2] Signed-off-by: Ben Dooks <ben-linux@fluff.org> Cc: Pierre Ossman <pierre@ossman.eu> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06sdhci: add adma descriptor set callBen Dooks
The code to write the ADMA descriptor into memory is repeated several times throughout sdhci_adma_table_pre, and thus should be moved into a common function. This will also be useful if the patch to make the write more efficient is accepted. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Cc: Pierre Ossman <pierre@ossman.eu> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06sdio: add quirk to clamp byte mode transferBing Zhao
Some SDIO cards expect byte transfers not to exceed the configured block transfer size. Add a quirk to that effect. Patches to make use of this quirk will be sent separately. Signed-off-by: Bing Zhao <bzhao@marvell.com> Signed-off-by: Nicolas Pitre <nico@marvell.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06mmc: bfin_sdh: set timeout based on actual card dataCliff Cai
The hardcoded value doesn't really work for all cards. Signed-off-by: Cliff Cai <cliff.cai@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06mmc: bfin_sdh: drop redundant MMC depend stringMike Frysinger
The host/Kconfig file is only included when MMC is selected. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06mmc: bfin_sdh: fix unused sg warning on BF51x/BF52x systemsMike Frysinger
The local sg variable is only used with BF54x code. Signed-off-by: Mike Frysinger <vapier@gentoo.org> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06mmc: Atmel host kconfig cleanup for everyone elseNicolas Ferre
This prevents those without an Atmel chip having a line in kernel configuration which says "Atmel SD/MMC Driver" without any option. Signed-off-by: Jonathan Cameron <jic23@cam.ac.uk> Signed-off-by: Nicolas Ferre <nicolas.ferre@atmel.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06davinci: MMC: add support for 8bit MMC cardsVipin Bhandari
Add support for 8bit MMC cards. The controller data width is configurable depending on the wires setting in the platform data structure. MMC 8bit is tested on OMAPL137 and MMC 4bit is tested on OMAPL138 EVM. Signed-off-by: Vipin Bhandari <vipin.bhandari@ti.com> Cc: David Brownell <david-b@pacbell.net> Cc: Chaithrika U S <chaithrika@ti.com> Cc: Sudhakar Rajashekhara <sudhakar.raj@ti.com> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06ricoh_mmc: port from driver to pci quirkMaxim Levitsky
This patch solves nasty problem original driver has. Original goal of the ricoh_mmc was to disable this device because then, mmc cards can be read using standard SDHCI controller, thus avoiding writing of yet another driver. However, the act of disablement, makes other pci functions that belong to this controller (xD and memstick) shift up one level, thus pci core has now wrong idea about these devices. To fix this issue, this patch moves the driver into the pci quirk section, thus it is executes before the pci is enumerated, and therefore solving that issue, also same sequence of commands is performed on resume for same reasons. Also regardless of the above, this way is cleaner. You still need to set CONFIG_MMC_RICOH_MMC to enable this quirk Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com> Acked-by: Philip Langdale <philipl@overt.org> Acked-by: Wolfram Sang <w.sang@pengutronix.de> Cc: <linux-mmc@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06fs/compat_ioctl.c: suppress two warningsAndrew Morton
fs/compat_ioctl.c: In function 'do_ioctl_trans': fs/compat_ioctl.c:534: warning: 'karg' may be used uninitialized in this function fs/compat_ioctl.c:533: warning: 'kcmd' may be used uninitialized in this function fs/compat_ioctl.c:656: warning: 'ret' may be used uninitialized in this function Reduces text size by 44 bytes. If someone calls one of these functions with an unexpected argument, the code's buggy as-is. Amerigo Wang <amwang@redhat.com> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Acked-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06bitmap: use for_each_set_bit()Akinobu Mita
Replace open-coded loop with for_each_set_bit(). Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06lib: fix first line of kernel-doc for a few functionsBen Hutchings
The function name must be followed by a space, hypen, space, and a short description. Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06lib: build list_sort() only if neededDon Mullis
Build list_sort() only for configs that need it -- those that don't save ~581 bytes (i386). Signed-off-by: Don Mullis <don.mullis@gmail.com> Cc: Dave Airlie <airlied@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Dave Chinner <david@fromorbit.com> Cc: Artem Bityutskiy <dedekind@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06lib: revise list_sort() header commentDon Mullis
Clarify and correct header comment of list_sort(). Signed-off-by: Don Mullis <don.mullis@gmail.com> Cc: Dave Airlie <airlied@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Dave Chinner <david@fromorbit.com> Cc: Artem Bityutskiy <dedekind@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06lib: more scalable list_sort()Don Mullis
XFS and UBIFS can pass long lists to list_sort(); this alternative implementation scales better, reaching ~3x performance gain when list length exceeds the L2 cache size. Stand-alone program timings were run on a Core 2 duo L1=32KB L2=4MB, gcc-4.4, with flags extracted from an Ubuntu kernel build. Object size is 581 bytes compared to 455 for Mark J. Roberts' code. Worst case for either implementation is a list length just over a power of two, and to roughly the same degree, so here are timing results for a range of 2^N+1 lengths. List elements were 16 bytes each including malloc overhead; initial order was random. time (msec) Tatham-Roberts | generic-Mullis-v2 loop_count length | | ratio 4000000 2 206 294 1.427 2000000 3 176 227 1.289 1000000 5 199 172 0.864 500000 9 235 178 0.757 250000 17 243 182 0.748 125000 33 261 196 0.750 62500 65 277 209 0.754 31250 129 292 219 0.75 15625 257 317 235 0.741 7812 513 340 252 0.741 3906 1025 362 267 0.737 1953 2049 388 283 0.729 ~ L1 size 976 4097 556 323 0.580 488 8193 678 361 0.532 244 16385 773 395 0.510 122 32769 844 418 0.495 61 65537 917 454 0.495 30 131073 1128 543 0.481 15 262145 2355 869 0.369 ~ L2 size 7 524289 5597 1714 0.306 3 1048577 6218 2022 0.325 Mark's code does not actually implement the usual or generic mergesort, but rather a variant from Simon Tatham described here: http://www.chiark.greenend.org.uk/~sgtatham/algorithms/listsort.html Simon's algorithm performs O(log N) passes over the entire input list, doing merges of sublists that double in size on each pass. The generic algorithm instead merges pairs of equal length lists as early as possible, in recursive order. For either algorithm, the elements that extend the list beyond power-of-two length are a special case, handled as nearly as possible as a "rounding-up" to a full POT. Some intuition for the locality of reference implications of merge order may be gotten by watching this animation: http://www.sorting-algorithms.com/merge-sort Simon's algorithm requires only O(1) extra space rather than the generic algorithm's O(log N), but in my non-recursive implementation the actual O(log N) data is merely a vector of ~20 pointers, which I've put on the stack. Long-running list_sort() calls: If the list passed in may be long, or the client's cmp() callback function is slow, the client's cmp() may periodically invoke cond_resched() to voluntarily yield the CPU. All inner loops of list_sort() call back to cmp(). Stability of the sort: distinct elements that compare equal emerge from the sort in the same order as with Mark's code, for simple test cases. A boot-time test is provided to verify this and other correctness requirements. A kernel that uses drm.ko appears to run normally with this change; I have no suitable hardware to similarly test the use by UBIFS. [akpm@linux-foundation.org: style tweaks, fix comment, make list_sort_test __init] Signed-off-by: Don Mullis <don.mullis@gmail.com> Cc: Dave Airlie <airlied@redhat.com> Cc: Andi Kleen <andi@firstfloor.org> Cc: Dave Chinner <david@fromorbit.com> Cc: Artem Bityutskiy <dedekind@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06lib/string.c: simplify strnstr()André Goddard Rosa
Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com> Cc: Li Zefan <lizf@cn.fujitsu.com> Cc: Joe Perches <joe@perches.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06lib/string.c: simplify stricmp()André Goddard Rosa
Removes 32 bytes on core2 with gcc 4.4.1: text data bss dec hex filename 3196 0 0 3196 c7c lib/string-BEFORE.o 3164 0 0 3164 c5c lib/string-AFTER.o Signed-off-by: André Goddard Rosa <andre.goddard@gmail.com> Cc: Joe Perches <joe@perches.com> Cc: Frederic Weisbecker <fweisbec@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06MAINTAINERS: document and add "Q" patchwork queue entriesJoe Perches
Patchwork queues show the acceptance/rejection state of submitted patches for various MAINTAINER trees. Document their existence. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06MAINTAINERS: WAVELAN moved to stagingJoe Perches
by commit 0234f84ebb00d36c48062befa5436eef36b71ccd Update patterns Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06MAINTAINERS: STARMODE RADIO IP (STRIP) moved to stagingJoe Perches
by commit 955015bb0b42167d14f776ff5947ae2463a974dc Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06MAINTAINERS: update PERFORMANCE EVENTS F: patternsJoe Perches
To match arch/*/kernel perf_event location changes Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06MAINTAINERS: remove HAYES ESP SERIAL DRIVERJoe Perches
Commit f53a2ade0bb9f2a81f473e6469155172a96b7c38 ("tty: esp: remove broken driver") removed it Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06MAINTAINERS: remove AMD GEODE F: arch/x86/kernel/geode_32.cJoe Perches
Commit c95d1e53ed89b75a4d7b68d1cbae4607b1479243 ("cs5535: drop the Geode-specific MFGPT/GPIO code") removed it. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06scripts/get_maintainer.pl: fix possible infinite loopJoe Perches
If MAINTAINERS section entries are misformatted, it was possible to have an infinite loop. Correct the defect by always moving the index to the end of section + 1 Also, exit check for exclude as soon as possible. Signed-off-by: Joe Perches <joe@perches.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06get_maintainer: quote email address with periodStephen Hemminger
Picky mail systems won't accept email addresses where recipient has period in name; ie. David S. Miller <davemloft.net> will not work. Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Acked-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06get_maintainer: fix perlcritic warningsStephen Hemminger
perlcritic is a standard checker for Perl Best Practices. This patch fixes most of the warnings in the get_maintainer script. If kernel programmers are going to have checkpatch they should write clean scripts as well... Bareword file handle opened at line 176, column 1. See pages 202,204 of PBP. (Severity: 5) Two-argument "open" used at line 176, column 1. See page 207 of PBP. (Severity: 5) Bareword file handle opened at line 207, column 5. See pages 202,204 of PBP. (Severity: 5) Two-argument "open" used at line 207, column 5. See page 207 of PBP. (Severity: 5) Bareword file handle opened at line 246, column 6. See pages 202,204 of PBP. (Severity: 5) Two-argument "open" used at line 246, column 6. See page 207 of PBP. (Severity: 5) Bareword file handle opened at line 258, column 2. See pages 202,204 of PBP. (Severity: 5) Two-argument "open" used at line 258, column 2. See page 207 of PBP. (Severity: 5) Expression form of "eval" at line 983, column 17. See page 161 of PBP. (Severity: 5) Expression form of "eval" at line 985, column 17. See page 161 of PBP. (Severity: 5) Subroutine prototypes used at line 1186, column 1. See page 194 of PBP. (Severity: 5) Subroutine prototypes used at line 1206, column 1. See page 194 of PBP. (Severity: 5) Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Acked-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06scripts/get_maintainer.pl: add ability to read from STDINJoe Perches
Doesn't need or accept '-' as a trailing option to read stdin. Doesn't print usage() after bad options. Adds --usage as command line equivalent of --help Suggested-by: Borislav Petkov <petkovbb@googlemail.com> Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06scripts/get_maintainer.pl: change --sections to print in the same style as ↵Joe Perches
MAINTAINERS Signed-off-by: Joe Perches <joe@perches.com> Cc: Stefan Richter <stefanr@s5r6.in-berlin.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06scripts/get_maintainer.pl: add --sections, print entire matched subsystemJoe Perches
Print the complete contents of the matched subsystems in pattern match depth order. Sample output: $ ./scripts/get_maintainer.pl --sections -f drivers/net/usb/smsc95xx.c USB SMSC95XX ETHERNET DRIVER M:Steve Glendinning <steve.glendinning@smsc.com> L:netdev@vger.kernel.org S:Supported F:drivers/net/usb/smsc95xx.* USB SUBSYSTEM M:Greg Kroah-Hartman <gregkh@suse.de> L:linux-usb@vger.kernel.org W:http://www.linux-usb.org T:quilt kernel.org/pub/linux/kernel/people/gregkh/gregkh-2.6/ S:Supported F:Documentation/usb/ F:drivers/net/usb/ F:drivers/usb/ F:include/linux/usb.h F:include/linux/usb/ NETWORKING DRIVERS L:netdev@vger.kernel.org W:http://www.linuxfoundation.org/en/Net T:git git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-2.6.git S:Odd Fixes F:drivers/net/ F:include/linux/if_* F:include/linux/*device.h THE REST M:Linus Torvalds <torvalds@linux-foundation.org> L:linux-kernel@vger.kernel.org Q:http://patchwork.kernel.org/project/LKML/list/ T:git git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git S:Buried alive in reporters F:* F:*/ Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06scripts/get_maintainer.pl: add --file-emails, find embedded email addressesJoe Perches
Add an imperfect option to search a source file for email addresses. New option: --file-emails or --fe email addresses in files are freeform text and are nearly impossible to parse. Still, might as well try to do a somewhat acceptable job of finding them. This code should find all addresses that are in the form addr@domain.tld The code assumes that up to 3 alphabetic words along with dashes, commas, and periods that preceed the email address are a name. If 3 words are found for the name, and one of the first two words are a single letter and period, or just a single letter then the 3 words are use as name otherwise the last 2 words are used. Some variants that are shown correctly: John Smith <jksmith@domain.org> Random J. Developer <rjd@tld.com> Random J. Developer (rjd@tld.com) J. Random Developer rjd@tld.com Variants that are shown nominally correctly: Written by First Last (funny-addr@somecompany.com) is shown as: First Last <funny-addr@somecompany.com> Variants that are shown incorrectly: Some Really Long Name <srln@foo.bar> MontaVista Software, Inc. <source@mvista.com> are returned as: Long Name <srln@foo.bar> "Software, Inc" <source@mvista.com> --roles and --rolestats show "(in file)" for matches. For instance: Without -file-emails: $ ./scripts/get_maintainer.pl -f -nogit -roles net/core/netpoll.c David S. Miller <davem@davemloft.net> (maintainer:NETWORKING [GENERAL]) linux-kernel@vger.kernel.org (open list) With -fe: $ ./scripts/get_maintainer.pl -f -fe -nogit -roles net/core/netpoll.c David S. Miller <davem@davemloft.net> (maintainer:NETWORKING [GENERAL]) Matt Mackall <mpm@selenic.com> (in file) Ingo Molnar <mingo@redhat.com> (in file) linux-kernel@vger.kernel.org (open list) netdev@vger.kernel.org (open list:NETWORKING [GENERAL]) The number of email addresses in the file in not limited. Neither is the number of returned email addresses. Signed-off-by: Joe Perches <joe@perches.com> Cc: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06printk: avoid warning when CONFIG_PRINTK is disabledGustavo F. Padovan
kernel/printk.c:72: warning: `saved_console_loglevel' defined but not used Signed-off-by: Gustavo F. Padovan <padovan@profusion.mobi> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06exec: create initial stack independent of PAGE_SIZEMichael Neuling
Currently we create the initial stack based on the PAGE_SIZE. This is unnecessary. This creates this initial stack independent of the PAGE_SIZE. It also bumps up the number of 4k pages allocated from 20 to 32, to align with 64K page systems. Signed-off-by: Michael Neuling <mikey@neuling.org> Cc: Helge Deller <deller@gmx.de> Reviewed-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Americo Wang <xiyou.wangcong@gmail.com> Cc: Anton Blanchard <anton@samba.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06kernel/pid.c: update comment on find_task_by_pid_nsTetsuo Handa
tasklist_lock does protect the task and its pid, it can't go away. The problem is that find_pid_ns() itself is unsafe without rcu lock, it can race with copy_process()->free_pid(any_pid). Protecting copy_process()->free_pid(any_pid) with tasklist_lock would make it possible to call find_task_by_pid_ns() under tasklist safely, but we don't do so because we are trying to get rid of the read_lock sites of tasklist_lock. Signed-off-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Cc: Oleg Nesterov <oleg@redhat.com> Cc: "Paul E. McKenney" <paulmck@us.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06panic: fix panic_timeout accuracy when running on a hypervisorAnton Blanchard
I've had some complaints about panic_timeout being wildly innacurate on shared processor PowerPC partitions (a 3 minute panic_timeout taking 30 minutes). The problem is we loop on mdelay(1) and with a 1ms in 10ms hypervisor timeslice each of these will take 10ms (ie 10x) longer. I expect other platforms with shared processor hypervisors will see the same issue. This patch keeps the old behaviour if we have a panic_blink (only keyboard LEDs right now) and does 1 second mdelays if we don't. Signed-off-by: Anton Blanchard <anton@samba.org> Cc: Ingo Molnar <mingo@elte.hu> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06kernel core: use helpers for rlimitsJiri Slaby
Make sure compiler won't do weird things with limits. E.g. fetching them twice may return 2 different values after writable limits are implemented. I.e. either use rlimit helpers added in commit 3e10e716abf3 ("resource: add helpers for fetching rlimits") or ACCESS_ONCE if not applicable. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: 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>
2010-03-06posix-cpu-timers: cleanup rlimits usageJiri Slaby
Fetch rlimit (both hard and soft) values only once and work on them. It removes many accesses through sig structure and makes the code cleaner. Mostly a preparation for writable resource limits support. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Ingo Molnar <mingo@elte.hu> Cc: Peter Zijlstra <peterz@infradead.org> Cc: 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>
2010-03-06kernel/exit.c: fix shadows sparse warningThiago Farina
kernel/exit.c:1183:26: warning: symbol 'status' shadows an earlier one kernel/exit.c:1173:21: originally declared here Signed-off-by: Thiago Farina <tfransosi@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06includecheck fix for kernel/params.cJaswinder Singh Rajput
Fix the following 'make includecheck' warning: kernel/params.c: linux/string.h is included more than once. Signed-off-by: Jaswinder Singh Rajput <jaswinderrajput@gmail.com> Cc: André Goddard Rosa <andre.goddard@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06splice: comparing unsigned int < 0Dan Carpenter
"ret" needs to be signed or the error handling for splice_to_pipe() won't work correctly. Signed-off-by: Dan Carpenter <error27@gmail.com> Cc: Tom Zanussi <zanussi@comcast.net> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Lai Jiangshan <laijs@cn.fujitsu.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06lkdtm: add debugfs access and loosen KPROBE tiesSimon Kagstrom
Add adds a debugfs interface and additional failure modes to LKDTM to provide similar functionality to the provoke-crash driver submitted here: http://lwn.net/Articles/371208/ Crashes can now be induced either through module parameters (as before) or through the debugfs interface as in provoke-crash. The patch also provides a new "direct" interface, where KPROBES are not used, i.e., the crash is invoked directly upon write to the debugfs file. When built without KPROBES configured, only this mode is available. Signed-off-by: Simon Kagstrom <simon.kagstrom@netinsight.net> Cc: M. Mohan Kumar <mohan@in.ibm.com> Cc: Americo Wang <xiyou.wangcong@gmail.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: "Eric W. Biederman" <ebiederm@xmission.com>, Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06eisa: fix coding style for eisa bus codeThadeu Lima de Souza Cascardo
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com> Cc: Kay Sievers <kay.sievers@vrfy.org> Cc: Greg Kroah-Hartman <gregkh@suse.de> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06drivers/misc/iwmc3200top/main.c: eliminate useless codeJulia Lawall
The variable priv is initialized twice to the same (side effect-free) expression. Drop one initialization. A simplified version of the semantic match that finds this problem is: (http://coccinelle.lip6.fr/) // <smpl> @forall@ idexpression *x; identifier f!=ERR_PTR; @@ x = f(...) ... when != x ( x = f(...,<+...x...+>,...) | * x = f(...) ) // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Cc: Tomas Winkler <tomas.winkler@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06init/main.c: make setup_max_cpus static for !SMPH Hartley Sweeten
The only in tree external users of the symbol setup_max_cpus are in arch/x86/. The files ./kernel/alternative.c, ./kernel/visws_quirks.c, and ./mm/kmemcheck/kmemcheck.c are all guarded by CONFIG_SMP being defined. For this case the symbol is an unsigned int and declared as an extern in include/linux/smp.h. When CONFIG_SMP is not defined the symbol setup_max_cpus is a constant value that is only used in init/main.c. Make the symbol static for this case. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06smp: fix documentation in include/linux/smp.hRakib Mullick
smp: Fix documentation. Fix documentation in include/linux/smp.h: smp_processor_id() Signed-off-by: Rakib Mullick <rakib.mullick@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06nodemask.h: remove macro any_online_nodeH Hartley Sweeten
The macro any_online_node() is prone to producing sparse warnings due to the local symbol 'node'. Since all the in-tree users are really requesting the first online node (the mask argument is either NODE_MASK_ALL or node_online_map) just use the first_online_node macro and remove the any_online_node macro since there are no users. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Acked-by: David Rientjes <rientjes@google.com> Reviewed-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: Lee Schermerhorn <lee.schermerhorn@hp.com> Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Dave Hansen <dave@linux.vnet.ibm.com> Cc: Milton Miller <miltonm@bga.com> Cc: Nathan Fontenot <nfont@austin.ibm.com> Cc: Geoff Levand <geoffrey.levand@am.sony.com> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: J. Bruce Fields <bfields@fieldses.org> Cc: Neil Brown <neilb@suse.de> Cc: Trond Myklebust <Trond.Myklebust@netapp.com> Cc: David S. Miller <davem@davemloft.net> Cc: Benny Halevy <bhalevy@panasas.com> Cc: Chuck Lever <chuck.lever@oracle.com> Cc: Ricardo Labiaga <Ricardo.Labiaga@netapp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06fs: use rlimit helpersJiri Slaby
Make sure compiler won't do weird things with limits. E.g. fetching them twice may return 2 different values after writable limits are implemented. I.e. either use rlimit helpers added in commit 3e10e716abf3 ("resource: add helpers for fetching rlimits") or ACCESS_ONCE if not applicable. Signed-off-by: Jiri Slaby <jslaby@suse.cz> Cc: Alexander Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06cpumask: let num_*_cpus() function always return unsigned valuesHeiko Carstens
Dependent on CONFIG_SMP the num_*_cpus() functions return unsigned or signed values. Let them always return unsigned values to avoid strange casts. Fixes at least one warning: kernel/kprobes.c: In function 'register_kretprobe': kernel/kprobes.c:1038: warning: comparison of distinct pointer types lacks a cast Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com> Cc: Masami Hiramatsu <mhiramat@redhat.com> Cc: Ingo Molnar <mingo@elte.hu> 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>
2010-03-06init/initramfs.c: fix "symbol shadows an earlier one" noiseH Hartley Sweeten
The symbol 'count' is a local global variable in this file. The function clean_rootfs() should use a different symbol name to prevent "symbol shadows an earlier one" noise. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-03-06init/main.c: improve usability in case of init binary failureAndreas Mohr
- new Documentation/init.txt file describing various forms of failure trying to load the init binary after kernel bootup - extend the init/main.c init failure message to direct to Documentation/init.txt Signed-off-by: Andreas Mohr <andi@lisas.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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