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2006-01-09Merge branch 'upstream-linus' of ↵Linus Torvalds
master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6
2006-01-09[PATCH] netlink oops fix due to incorrect error codeKirill Korotaev
Fixed oops after failed netlink socket creation. Wrong parathenses in if() statement caused err to be 1, instead of negative value. Trivial fix, not trivial to find though. Signed-Off-By: Dmitry Mishin <dim@sw.ru> Signed-Off-By: Kirill Korotaev <dev@openvz.org> Signed-Off-By: Linus Torvalds <torvalds@osdl.org>
2006-01-09[PATCH] rcu: uninline __rcu_pending()Oleg Nesterov
__rcu_pending() is rather fat and called twice from rcu_pending(). rcu_pending() has multiple callers, and not that small too. This patch uninlines both of them. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Acked-by: Paul E. McKenney <paulmck@us.ibm.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-09Merge branch 'blk-softirq' of git://brick.kernel.dk/data/git/linux-2.6-blockLinus Torvalds
Manual merge for trivial #include changes
2006-01-09[patch] ipw2100: support WEXT-18 enc_capa v3Dan Williams
This patch allows ipw2100 driver to advertise the WPA-related encryption options that it does really support. It's necessary to work correctly with NetworkManager and other programs that actually check driver & card capabilities. Signed-off-by: Dan Williams <dcbw@redhat.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] fix a few "warning: 'cleanup_card' defined but not used"Denis Vlasenko
These warnings are emitted if non-modular network drivers are built. Fixes just move cleanup_card() definitions into #ifdef MODULE region. /.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/wd.c:131: warning: 'cleanup_card' defined but not used /.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/3c503.c:152: warning: 'cleanup_card' defined but not used /.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/ne.c:216: warning: 'cleanup_card' defined but not used /.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/hp.c:106: warning: 'cleanup_card' defined but not used /.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/hp-plus.c:142: warning: 'cleanup_card' defined but not used /.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/smc-ultra.c:172: warning: 'cleanup_card' defined but not used /.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/e2100.c:144: warning: 'cleanup_card' defined but not used /.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/es3210.c:159: warning: 'cleanup_card' defined but not used /.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/lne390.c:149: warning: 'cleanup_card' defined but not used /.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/lance.c:313: warning: 'cleanup_card' defined but not used /.1/usr/srcdevel/kernel/linux-2.6.15-rc7.src/drivers/net/ac3200.c:127: warning: 'cleanup_card' defined but not used Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] forcedeth: TSO fix for large buffersAyaz Abdulla
This contains a bug fix for large buffers. Originally, if a tx buffer to be sent was larger then the maximum size of the tx descriptor, it would overwrite other control bits. In this patch, the buffer is split over multiple descriptors. Also, the fragments are now setup in forward order. Signed-off-by: Ayaz Abdulla <aabdulla@nvidia.com> Signed-off-by: Manfred Spraul <manfred@colorfullife.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] remove bouncing mail address of mv643xx_eth maintainerOlaf Hering
Remove bouncing mail address of mv643xx maintainer. Signed-off-by: Olaf Hering <olh@suse.de> Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] e1000: Fix invalid memory referenceKenji Kaneshige
Fix an invalid memory reference in the e1000 driver which would cause kernel panic. Signed-off-by: Kenji Kaneshige <kaneshige.kenji@jp.fujitsu.com> Cc: Jeb Cramer <cramerj@intel.com> Cc: John Ronciak <john.ronciak@intel.com> Cc: Ganesh Venkatesan <ganesh.venkatesan@intel.com> Cc: Jeff Garzik <jgarzik@pobox.com> Acked-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] drivers/net/gianfar.h: "extern inline" -> "static inline"Adrian Bunk
"extern inline" doesn't make much sense. Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] drivers/net/bonding/bonding.h: "extern inline" -> "static inline"Adrian Bunk
"extern inline" doesn't make much sense. Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] drivers/net/Kconfig: indentation fixAdrian Bunk
This patch fixes a wrong indentation. Signed-off-by: Adrian Bunk <bunk@stusta.de> Cc: "David S. Miller" <davem@davemloft.net> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] Add MIPS dependency for dm9000 driverFranck
Add MIPS dependency for dm9000 ethernet controller. Indeed this controller is used by some embedded platforms based on MIPS CPUs. Signed-off-by: Franck Bui-Huu <franck.bui@gmail.com> Cc: Jeff Garzik <jgarzik@pobox.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] update bonding.txt to not show ip address on slavesEric Paris
ifenslave, as of abi version 2, does not set the ip address on the slave interfaces. The documentation example however still shows that the ensalved interfaces should have the same IP as the master. The patch simply removes the lines from the example which should no longer appear. Signed-off-by: Eric Paris <eparis@redhat.com> bonding.txt | 2 -- 1 files changed, 2 deletions(-) Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] tulip: enable multiport NIC BIOS fixups for x86_64Christoph Dworzak
A BIOS bug affecting some multiport tulip NICs requires an irq fixup in tulip_core.c. This has only been enabled for i686, but it is needed for x86_64 as well. Signed-off-by: John W. Linville <linville@tuxdriver.com> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] PPC44x EMAC driver: disable TX status deferral in half-duplex modeEugene Surovegin
Disable TX status deferral (EMACx_MR[MWSW=001]) in half-duplex mode. I have two reports when EMAC stops transmitting when connected to a hub. TX ring debug printouts show complete mess when this happens, probably hardware collision handling doesn't work quite well in this mode. This is relevant only for SoCs with EMAC4 core (440GX, 440SP, 440SPe). Tested on 440GX. Signed-off-by: Eugene Surovegin <ebs@ebshome.net> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] ieee80211: enable hw wep where host has to build IVJohannes Berg
This patch fixes some of the ieee80211 crypto related code so that instead of having the host fully do crypto operations, the host_build_iv flag works properly (for WEP in this patch) which, if turned on, requires the hardware to do all crypto operations, but the ieee80211 layer builds the IV. The hardware also has to build the ICV. Previously, the host_build_iv flag couldn't be used at all for WEP, and not alone (with both host_decrypt and host_encrypt disabled) because the crypto algorithm wasn't assigned. This is also fixed. I have tested this patch both in host crypto mode and in hw crypto mode (with the Broadcom chipset). [resent, signing digitally caused it to be MIME-junked, sorry] Signed-Off-By: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] sk98lin: error handling of pci setupStephen Hemminger
Don't enable the pci device twice (already done in the probe routine). Propogate the error codes from pci_request_region back to initial probing. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] sk98lin: error handling on probeStephen Hemminger
The sk98lin driver doesn't do proper error number handling during initialization. Note: -EAGAIN is a bogus return value for hardware errors. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] sk98lin: use kzallocStephen Hemminger
Trivial use of kzalloc. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] sk98lin: error handling on dual port boardStephen Hemminger
Sk98lin driver error recovery on two port boards is bad. If it fails the second allocation, it will not release resources properly. Also it registers the second port in the pci driver data If second port fails, might as well go with one port. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] sk98lin: not doing high dma properlyStephen Hemminger
Sk98lin 64bit memory handling is wrong. It doesn't set the highdma flag; i.e. the kernel always does bounce buffers. It doesn't fallback to 32 bit mask if it can't get 64 bit mask. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[PATCH] sk98lin: routine called from probe marked __initStephen Hemminger
Sk98lin driver has a routine marked __init that is called from the probe code. If using pci hotplug, this could be called after the initialization so it needs to be marked __devinit. So if you hot added a sk98lin board, the kernel would crash. I don't have hot plug hardware to actually try this feat. Also, there are two routines, only called from SkGeBoardInit that can be marked __devinit. Signed-off-by: Stephen Hemminger <shemminger@osdl.org> Signed-off-by: Jeff Garzik <jgarzik@pobox.com>
2006-01-09[BLOCK] CCISS: update for blk softirq completionsJens Axboe
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09[IDE] Use the block layer deferred softirq request completionJens Axboe
This patch makes IDE use the new blk_complete_request() interface. There's still room for improvement, as __ide_end_request() really could drop the lock after getting HWGROUP->rq (why does it need to hold it in the first place? If ->rq access isn't serialized, we are screwed anyways). Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09[SCSI] Kill the SCSI softirq handlingJens Axboe
This patch moves the SCSI softirq handling to the block layer version. There should be no functional changes. Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09[BLOCK] ll_rw_blk: Enable out-of-order request completions through softirqJens Axboe
Request completion can be a quite heavy process, since it needs to iterate through the entire request and complete the bio's it holds. This patch adds blk_complete_request() which moves this processing into a dedicated block softirq. Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09[BLOCK] Kill blk_attempt_remerge()Jens Axboe
It's a broken interface, it's done way too late. And apparently it triggers slab problems in recent kernels as well (most likely after the generic dispatch code was merged). So kill it, ide-cd is the only user of it. Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09[BLOCK] scsi_ioctl: file can be NULL from ioctl_by_bdev()Jens Axboe
Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09[BLOCK] bio: init ->bi_bdev in bio_init()Jens Axboe
For SG_IO requests, bio->bi_bdev may not be explicitly initialized. So make bio_init() clear the field to make sure it's always NULL or valid. Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09make elv_try_merge() static, kill the dead declaration ofCoywolf Qi Hunt
elv_try_last_merge(). Signed-off-by: Coywolf Qi Hunt <qiyong@fc-cn.com> Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-09[BLOCK][TRIVIAL] ll_rw_blk: header included twiceNicolas Kaiser
linux/blkdev.h included twice Signed-off-by: Nicolas Kaiser <nikai@nikai.net> Signed-off-by: Jens Axboe <axboe@suse.de>
2006-01-08Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/roland/infiniband
2006-01-08[PATCH] Make vm86 support optionalMatt Mackall
This adds an option to remove vm86 support under CONFIG_EMBEDDED. Saves about 5k. This version eliminates most of the #ifdefs of the previous version and instead uses function stubs in vm86.h. Also, release_vm86_irqs is moved from asm-i386/irq.h to a more appropriate home in vm86.h so that the stubs can live together. $ size vmlinux-baseline vmlinux-novm86 text data bss dec hex filename 2920821 523232 190652 3634705 377611 vmlinux-baseline 2916268 523100 190492 3629860 376324 vmlinux-novm86 Signed-off-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-08[PATCH] tiny: Configure ELF core dump supportMatt Mackall
configurable support for ELF core dumps text data bss dec hex filename 3330172 529036 190556 4049764 3dcb64 vmlinux-baseline 3325552 528912 190556 4045020 3db8dc vmlinux-no-elf add/remove: 0/8 grow/shrink: 0/0 up/down: 0/-4424 (-4424) function old new delta fill_note 32 - -32 maydump 58 - -58 dump_seek 67 - -67 writenote 180 - -180 elf_dump_thread_status 274 - -274 fill_psinfo 308 - -308 fill_prstatus 466 - -466 elf_core_dump 3039 - -3039 Signed-off-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-08[PATCH] tiny: Make *[ug]id16 support optionalMatt Mackall
Configurable 16-bit UID and friends support This allows turning off the legacy 16 bit UID interfaces on embedded platforms. text data bss dec hex filename 3330172 529036 190556 4049764 3dcb64 vmlinux-baseline 3328268 529040 190556 4047864 3dc3f8 vmlinux From: Adrian Bunk <bunk@stusta.de> UID16 was accidentially disabled for !EMBEDDED. Signed-off-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-08[PATCH] tiny: Make x86 doublefault handling optionalMatt Mackall
This adds configurable support for doublefault reporting on x86 add/remove: 0/3 grow/shrink: 0/1 up/down: 0/-13048 (-13048) function old new delta cpu_init 846 786 -60 doublefault_fn 188 - -188 doublefault_stack 4096 - -4096 doublefault_tss 8704 - -8704 Signed-off-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-08[PATCH] tiny: Trim non-IPX buildsMatt Mackall
trivial: drop unused 802.3 code if we compile without IPX (originally from http://wohnheim.fh-wedel.de/~joern/software/kernel/je/25/) Signed-off-by: Matt Mackall <mpm@selenic.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Arnaldo Carvalho de Melo <acme@conectiva.com.br> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-08[PATCH] tiny: Uninline some fslocks.c functionsMatt Mackall
uninline some file locking functions add/remove: 3/0 grow/shrink: 0/15 up/down: 256/-1525 (-1269) function old new delta locks_free_lock - 134 +134 posix_same_owner - 69 +69 __locks_delete_block - 53 +53 posix_locks_conflict 126 108 -18 locks_remove_posix 266 237 -29 locks_wake_up_blocks 121 87 -34 locks_block_on_timeout 83 47 -36 locks_insert_block 157 120 -37 locks_delete_block 62 23 -39 posix_unblock_lock 104 59 -45 posix_locks_deadlock 162 100 -62 locks_delete_lock 228 119 -109 sys_flock 338 217 -121 __break_lease 600 474 -126 lease_init 252 122 -130 fcntl_setlk64 793 649 -144 fcntl_setlk 793 649 -144 __posix_lock_file 1477 1026 -451 Signed-off-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-08[PATCH] tiny: Uninline some inode.c functionsMatt Mackall
uninline a couple inode.c functions add/remove: 2/0 grow/shrink: 0/5 up/down: 256/-428 (-172) function old new delta ifind - 136 +136 ifind_fast - 120 +120 ilookup5_nowait 131 80 -51 ilookup 158 71 -87 ilookup5 171 80 -91 iget_locked 190 95 -95 iget5_locked 240 136 -104 Signed-off-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-08[PATCH] tiny: Uninline some open.c functionsMatt Mackall
uninline some open.c functions add/remove: 3/0 grow/shrink: 0/6 up/down: 679/-1166 (-487) function old new delta do_sys_truncate - 336 +336 do_sys_ftruncate - 317 +317 __put_unused_fd - 26 +26 put_unused_fd 57 49 -8 sys_close 150 119 -31 sys_ftruncate64 260 26 -234 sys_ftruncate 272 24 -248 sys_truncate 339 25 -314 sys_truncate64 336 5 -331 Signed-off-by: Matt Mackall <mpm@selenic.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-08[PATCH] tiny: Add bloat-o-meter to scriptsMatt Mackall
This is a rewrite of Andi Kleen's bloat-o-meter with sorting and reporting of gainers/decliners. Sample output: add/remove: 0/8 grow/shrink: 2/0 up/down: 88/-4424 (-4336) function old new delta __copy_to_user_ll 59 103 +44 __copy_from_user_ll 59 103 +44 fill_note 32 - -32 maydump 58 - -58 dump_seek 67 - -67 writenote 180 - -180 elf_dump_thread_status 274 - -274 fill_psinfo 308 - -308 fill_prstatus 466 - -466 elf_core_dump 3039 - -3039 The summary line says: no functions added, 8 removed two functions grew, none shrunk we gained 88 bytes and lost 4424 (or -4336 net) This work was sponsored in part by CE Linux Forum Signed-off-by: Matt Mackall <mpm@selenic.com> Cc: Andi Kleen <ak@muc.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-08[PATCH] vr41xx: section tags fixJean Delvare
module_init functions must be tagged __init rather than __devinit; likewise, module_exit functions must be tagged __exit rather than __devexit. Signed-off-by: Jean Delvare <khali@linux-fr.org> Cc: Yoichi Yuasa <yuasa@hh.iij4u.or.jp> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-08[PATCH] cciss: avoid defining useless MAJOR_NR macroChristoph Hellwig
This sneaked in with one of the updates. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-08[PATCH] drivers/isdn/hardware/eicon/os_4bri.c: correct the xdiLoadFile() ↵Adrian Bunk
signature It's not good if caller and callee disagree regarding the type of the arguments. In this case, this could cause problems on 64bit architectures. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Armin Schindler <armin@melware.de> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-08[PATCH] drivers/isdn/: add missing #includesAdrian Bunk
Every file should #include the headers containing the prototypes for its global functions. Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Armin Schindler <armin@melware.de> Cc: Karsten Keil <kkeil@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-08[PATCH] simplify k_getrusage()Oleg Nesterov
Factor out common code for different RUSAGE_xxx cases. Don't take ->sighand->siglock in RUSAGE_SELF case, suggested by Ravikiran G Thirumalai <kiran@scalex86.org>. Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-08[PATCH] i810_audio: request_irq() fixAndrew Morton
Request the IRQ after having set everything up. Otherwise a shared interrupt at the right time can kill the machine. Found this with David Woodhouse <dwmw2@infradead.org>'s debug-shared-irqs.patch. Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-08[PATCH] kconf: Check for eof from input stream.Ben Collins
Signed-off-by: Ben Collins <bcollins@ubuntu.com> Cc: Sam Ravnborg <sam@ravnborg.org> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-01-08[PATCH] fix workqueue oops during cpu offlineNathan Lynch
Use first_cpu(cpu_possible_map) for the single-thread workqueue case. We used to hardcode 0, but that broke on systems where !cpu_possible(0) when workqueue_struct->cpu_workqueue_struct was changed from a static array to alloc_percpu. Commit id bce61dd49d6ba7799be2de17c772e4c701558f14 ("Fix hardcoded cpu=0 in workqueue for per_cpu_ptr() calls") fixed that for Ben's funky sparc64 system, but it regressed my Power5. Offlining cpu 0 oopses upon the next call to queue_work for a single-thread workqueue, because now we try to manipulate per_cpu_ptr(wq->cpu_wq, 1), which is uninitialized. So we need to establish an unchanging "slot" for single-thread workqueues which will have a valid percpu allocation. Since alloc_percpu keys off of cpu_possible_map, which must not change after initialization, make this slot == first_cpu(cpu_possible_map). Signed-off-by: Nathan Lynch <ntl@pobox.com> Cc: <stable@kernel.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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