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* Merge branch 'timers-for-linus' of ↵Linus Torvalds2009-12-092-36/+11
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip * 'timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: timers, init: Limit the number of per cpu calibration bootup messages posix-cpu-timers: optimize and document timer_create callback clockevents: Add missing include to pacify sparse x86: vmiclock: Fix printk format x86: Fix printk format due to variable type change sparc: fix printk for change of variable type clocksource/events: Fix fallout of generic code changes nohz: Allow 32-bit machines to sleep for more than 2.15 seconds nohz: Track last do_timer() cpu nohz: Prevent clocksource wrapping during idle nohz: Type cast printk argument mips: Use generic mult/shift factor calculation for clocks clocksource: Provide a generic mult/shift factor calculation clockevents: Use u32 for mult and shift factors nohz: Introduce arch_needs_cpu nohz: Reuse ktime in sub-functions of tick_check_idle. time: Remove xtime_cache time: Implement logarithmic time accumulation
| * mips: Use generic mult/shift factor calculation for clocksThomas Gleixner2009-11-132-36/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Replace the MIPS functions of mult/shift factor calculation for clock events and clock sources with inline functions which call the generic functions. The minimum guaranteed conversion range is set to 4 seconds which corresponds to the current MIPS implementation. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Mikael Pettersson <mikpe@it.uu.se> Acked-by: Ralf Baechle <ralf@linux-mips.org> Acked-by: Linus Walleij <linus.walleij@stericsson.com> Cc: John Stultz <johnstul@us.ibm.com> LKML-Reference: <20091111134229.807255074@linutronix.de>
* | Merge branch 'for-2.6.33' of git://git.kernel.dk/linux-2.6-blockLinus Torvalds2009-12-081-0/+1
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-2.6.33' of git://git.kernel.dk/linux-2.6-block: (113 commits) cfq-iosched: Do not access cfqq after freeing it block: include linux/err.h to use ERR_PTR cfq-iosched: use call_rcu() instead of doing grace period stall on queue exit blkio: Allow CFQ group IO scheduling even when CFQ is a module blkio: Implement dynamic io controlling policy registration blkio: Export some symbols from blkio as its user CFQ can be a module block: Fix io_context leak after failure of clone with CLONE_IO block: Fix io_context leak after clone with CLONE_IO cfq-iosched: make nonrot check logic consistent io controller: quick fix for blk-cgroup and modular CFQ cfq-iosched: move IO controller declerations to a header file cfq-iosched: fix compile problem with !CONFIG_CGROUP blkio: Documentation blkio: Wait on sync-noidle queue even if rq_noidle = 1 blkio: Implement group_isolation tunable blkio: Determine async workload length based on total number of queues blkio: Wait for cfq queue to get backlogged if group is empty blkio: Propagate cgroup weight updation to cfq groups blkio: Drop the reference to queue once the task changes cgroup blkio: Provide some isolation between groups ...
| * \ Merge branch 'master' into for-2.6.33Jens Axboe2009-12-0366-546/+808
| |\ \
| * | | block: add helpers to run flush_dcache_page() against a bio and a request's ↵Ilya Loginov2009-11-261-0/+1
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | pages Mtdblock driver doesn't call flush_dcache_page for pages in request. So, this causes problems on architectures where the icache doesn't fill from the dcache or with dcache aliases. The patch fixes this. The ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE symbol was introduced to avoid pointless empty cache-thrashing loops on architectures for which flush_dcache_page() is a no-op. Every architecture was provided with this flush pages on architectires where ARCH_IMPLEMENTS_FLUSH_DCACHE_PAGE is equal 1 or do nothing otherwise. See "fix mtd_blkdevs problem with caches on some architectures" discussion on LKML for more information. Signed-off-by: Ilya Loginov <isloginov@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Peter Horton <phorton@bitbox.co.uk> Cc: "Ed L. Cashin" <ecashin@coraid.com> Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
* | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6Linus Torvalds2009-12-086-6/+15
|\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next-2.6: (1815 commits) mac80211: fix reorder buffer release iwmc3200wifi: Enable wimax core through module parameter iwmc3200wifi: Add wifi-wimax coexistence mode as a module parameter iwmc3200wifi: Coex table command does not expect a response iwmc3200wifi: Update wiwi priority table iwlwifi: driver version track kernel version iwlwifi: indicate uCode type when fail dump error/event log iwl3945: remove duplicated event logging code b43: fix two warnings ipw2100: fix rebooting hang with driver loaded cfg80211: indent regulatory messages with spaces iwmc3200wifi: fix NULL pointer dereference in pmkid update mac80211: Fix TX status reporting for injected data frames ath9k: enable 2GHz band only if the device supports it airo: Fix integer overflow warning rt2x00: Fix padding bug on L2PAD devices. WE: Fix set events not propagated b43legacy: avoid PPC fault during resume b43: avoid PPC fault during resume tcp: fix a timewait refcnt race ... Fix up conflicts due to sysctl cleanups (dead sysctl_check code and CTL_UNNUMBERED removed) in kernel/sysctl_check.c net/ipv4/sysctl_net_ipv4.c net/ipv6/addrconf.c net/sctp/sysctl.c
| * \ \ Merge branch 'master' of /home/davem/src/GIT/linux-2.6/David S. Miller2009-12-063-4/+7
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: drivers/net/pcmcia/fmvj18x_cs.c drivers/net/pcmcia/nmclan_cs.c drivers/net/pcmcia/xirc2ps_cs.c drivers/net/wireless/ray_cs.c
| * \ \ \ Merge branch 'master' of ↵David S. Miller2009-12-023-9/+28
| |\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: net/mac80211/ht.c
| * | | | | MIPS: Wire up recvmmsg syscallArnaldo Carvalho de Melo2009-12-021-6/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Reported-by: Jean-Mickael Guerin <jean-mickael.guerin@6wind.com> Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | | Merge branch 'master' of ↵David S. Miller2009-11-1962-536/+774
| |\ \ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/sfc/sfe4001.c drivers/net/wireless/libertas/cmd.c drivers/staging/Kconfig drivers/staging/Makefile drivers/staging/rtl8187se/Kconfig drivers/staging/rtl8192e/Kconfig
| * | | | | | net: Introduce recvmmsg socket syscallArnaldo Carvalho de Melo2009-10-134-0/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Meaning receive multiple messages, reducing the number of syscalls and net stack entry/exit operations. Next patches will introduce mechanisms where protocols that want to optimize this operation will provide an unlocked_recvmsg operation. This takes into account comments made by: . Paul Moore: sock_recvmsg is called only for the first datagram, sock_recvmsg_nosec is used for the rest. . Caitlin Bestler: recvmmsg now has a struct timespec timeout, that works in the same fashion as the ppoll one. If the underlying protocol returns a datagram with MSG_OOB set, this will make recvmmsg return right away with as many datagrams (+ the OOB one) it has received so far. . Rémi Denis-Courmont & Steven Whitehouse: If we receive N < vlen datagrams and then recvmsg returns an error, recvmmsg will return the successfully received datagrams, store the error and return it in the next call. This paves the way for a subsequent optimization, sk_prot->unlocked_recvmsg, where we will be able to acquire the lock only at batch start and end, not at every underlying recvmsg call. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
| * | | | | | net: Generalize socket rx gap / receive queue overflow cmsgNeil Horman2009-10-121-0/+2
| | |_|_|/ / | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Create a new socket level option to report number of queue overflows Recently I augmented the AF_PACKET protocol to report the number of frames lost on the socket receive queue between any two enqueued frames. This value was exported via a SOL_PACKET level cmsg. AFter I completed that work it was requested that this feature be generalized so that any datagram oriented socket could make use of this option. As such I've created this patch, It creates a new SOL_SOCKET level option called SO_RXQ_OVFL, which when enabled exports a SOL_SOCKET level cmsg that reports the nubmer of times the sk_receive_queue overflowed between any two given frames. It also augments the AF_PACKET protocol to take advantage of this new feature (as it previously did not touch sk->sk_drops, which this patch uses to record the overflow count). Tested successfully by me. Notes: 1) Unlike my previous patch, this patch simply records the sk_drops value, which is not a number of drops between packets, but rather a total number of drops. Deltas must be computed in user space. 2) While this patch currently works with datagram oriented protocols, it will also be accepted by non-datagram oriented protocols. I'm not sure if thats agreeable to everyone, but my argument in favor of doing so is that, for those protocols which aren't applicable to this option, sk_drops will always be zero, and reporting no drops on a receive queue that isn't used for those non-participating protocols seems reasonable to me. This also saves us having to code in a per-protocol opt in mechanism. 3) This applies cleanly to net-next assuming that commit 977750076d98c7ff6cbda51858bb5a5894a9d9ab (my af packet cmsg patch) is reverted Signed-off-by: Neil Horman <nhorman@tuxdriver.com> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* | | | | | Merge git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/sysctl-2.6Linus Torvalds2009-12-084-172/+14
|\ \ \ \ \ \ | |_|_|_|/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/sysctl-2.6: (43 commits) security/tomoyo: Remove now unnecessary handling of security_sysctl. security/tomoyo: Add a special case to handle accesses through the internal proc mount. sysctl: Drop & in front of every proc_handler. sysctl: Remove CTL_NONE and CTL_UNNUMBERED sysctl: kill dead ctl_handler definitions. sysctl: Remove the last of the generic binary sysctl support sysctl net: Remove unused binary sysctl code sysctl security/tomoyo: Don't look at ctl_name sysctl arm: Remove binary sysctl support sysctl x86: Remove dead binary sysctl support sysctl sh: Remove dead binary sysctl support sysctl powerpc: Remove dead binary sysctl support sysctl ia64: Remove dead binary sysctl support sysctl s390: Remove dead sysctl binary support sysctl frv: Remove dead binary sysctl support sysctl mips/lasat: Remove dead binary sysctl support sysctl drivers: Remove dead binary sysctl support sysctl crypto: Remove dead binary sysctl support sysctl security/keys: Remove dead binary sysctl support sysctl kernel: Remove binary sysctl logic ...
| * | | | | sysctl: Drop & in front of every proc_handler.Eric W. Biederman2009-11-181-11/+11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | For consistency drop & in front of every proc_handler. Explicity taking the address is unnecessary and it prevents optimizations like stubbing the proc_handlers to NULL. Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: Ingo Molnar <mingo@elte.hu> Cc: Joe Perches <joe@perches.com> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
| * | | | | sysctl mips/lasat: Remove dead binary sysctl supportEric W. Biederman2009-11-121-98/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that sys_sysctl is a generic wrapper around /proc/sys .ctl_name and .strategy members of sysctl tables are dead code. Remove them. The deleted strategy routines here surprise me. ctl_name was CTL_UNNUMBERED so they would not have been called at all. Acked-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
| * | | | | sysctl: mips Use the compat_sys_sysctlEric W. Biederman2009-11-063-63/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Now that we have a generic 32bit compatibility implementation there is no need for mips to implement it's own. Cc: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
* | | | | | MIPS: Convert BUG() to use unreachable()David Daney2009-12-051-3/+1
| |_|_|_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use the new unreachable() macro instead of while(1); Signed-off-by: David Daney <ddaney@caviumnetworks.com> Acked-by: Ralf Baechle <ralf@linux-mips.org> CC: linux-mips@linux-mips.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | MIPS: RB532: Fix devices.c compilation.Florian Fainelli2009-12-021-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We should now use dev_set_drvdata to set the driver driver_data field. Signed-off-by: Florian Fainelli <florian@openwrt.org> Patchwork: http://patchwork.linux-mips.org/patch/747/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | | | MIPS: Fix MIPS I build.Ralf Baechle2009-12-021-0/+4
| |_|_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | Broken by d63c63e889bbeeaa461a8addf1245f89f3ce4ece (lmo) rsp. f1e39a4a616cd9981a9decfd5332fd07a01abb8b (kernel.org). Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Patchwork: http://patchwork.linux-mips.org/patch/746/
* | | | MIPS: Loongson: Switch from flatmem to sparsememWu Zhangjin2009-12-011-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With flatmem hibernation for Loongson will fail, and there are also some other problems such as broken files when using NFS or CIFS / Samba. The config help of sparsemem says: "This option provides some potential performance benefits, along with decreased code complexity." So to avoid the potential problems of FLATMEM, we disable FLATMEM directly and use SPARSEMEM instead. Related email thread: http://groups.google.com/group/loongson-dev/browse_thread/thread/b6b65890ec2b0f24/feb43e5aa7f55d9b?show_docid=feb43e5aa7f55d9b Reported-by: Tatu Kilappa <tatu.kilappa@gmail.com> Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Patchwork: http://patchwork.linux-mips.org/patch/737/ Cc: linux-mips@linux-mips.org Cc: zhangfx@lemote.com Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | | MIPS: Loongson: Disallow 4kB pagesWu Zhangjin2009-12-011-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, with PAGE_SIZE_4KB, the kernel for loongson will hang on: Kernel panic - not syncing: Attempted to kill init! The possible reason is the cache aliases problem: Loongson 2F has 64kb, 4 way L1 Cache, the way size is 16kb, which is bigger then 4kb. so, If using 4kb page size, there is cache aliases problem. To avoid this kind of problem, extra cache flushing. The 2nd possible solution is 16kb page size which avoids cache aliases without the need for extra cache flushes. So we disable 4kB pages until the aliasing issue is solved. Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Patchwork: http://patchwork.linux-mips.org/patch/736/ Cc: linux-mips@linux-mips.org Cc: zhangfx@lemote.com Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | | MIPS: Add missing definition for MADV_HWPOISON.Ralf Baechle2009-12-011-0/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Thanks to Joseph S. Myers for reporting this. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Cc: "Joseph S. Myers" <joseph@codesourcery.com> Patchwork: http://patchwork.linux-mips.org/patch/723/
* | | | MIPS: Fix build error if __xchg() is not getting inlined.Ralf Baechle2009-12-011-6/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | If __xchg() is not getting inlined the outline version of the function will have a reference to __xchg_called_with_bad_pointer() which does not exist remaining. Fixed by using BUILD_BUG_ON() to check for allowable operand sizes. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Patchwork: http://patchwork.linux-mips.org/patch/705/
* | | | MIPS: IP22/IP28 Disable early printk to fix boot problems on some systems.Martin Michlmayr2009-12-011-2/+16
| |_|/ |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some Debian users have reported that the kernel hangs early during boot on some IP22 systems. Thomas Bogendoerfer found that this is due to a "bad interaction between CONFIG_EARLY_PRINTK and overwritten prom memory during early boot". Since there's no fix yet, disable CONFIG_EARLY_PRINTK for now. Signed-off-by: Martin Michlmayr <tbm@cyrius.com> Cc: linux-mips@linux-mips.org Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de> Cc: Dmitri Vorobiev <dmitri.vorobiev@gmail.com> Patchwork: http://patchwork.linux-mips.org/patch/702/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | MIPS: SMTC: Fix lockup in smtc_distribute_timerKevin D. Kissell2009-11-131-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1. At the end of smtc_distribute_timer, nextstamp is valid and has already passed so we goto repeat. 2. Nothing updates nextstamp (only updated if the timeout is in the future And we just decided it is in the past) 3. At the end nextstamp still has the same value so it is still valid and in the past. 4. This repeats until read_c0_count has a value which causes nextstamp to be in the future. Reported and initial patch and testing by Mikael Starvik <mikael.starvik@axis.com>. Signed-off-by: Kevin D. Kissell <kevink@paralogos.com> Cc: Mikael Starvik <mikael.starvik@axis.com> Cc: linux-mips@linux-mips.org Cc: Jesper Nilsson <Jesper.Nilsson@axis.com> Patchwork: http://patchwork.linux-mips.org/patch/621/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | MIPS: TXx9: Update rbtx49xx_defconfigAtsushi Nemoto2009-11-131-60/+192
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Enable following features: * MTD (RBTX4939, NAND_TXX9NDFMC) * HW_RANDOM (HW_RANDOM_TX4939) * SOUND (SND_SOC_TXX9ACLC) * DMADEVICE (TXX9_DMAC) Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | MIPS: Make local arrays with CL_SIZE static __initdataAtsushi Nemoto2009-11-134-5/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Since commit 22242681cff52bfb7cba5d2a37b91802be7a4e4c ("MIPS: Extend COMMAND_LINE_SIZE"), CL_SIZE is 4096 and local array variables with this size will cause an build failure with default CONFIG_FRAME_WARN settings. Although current users of such array variables are all early bootstrap code and not likely to cause real stack overflow (thread_info corruption), it is preferable to to declare these arrays static with __initdata. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | MIPS: Add DMA declare coherent memory supportYoichi Yuasa2009-11-133-10/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The ohci-sm501 driver requires dma_declare_coherent_memory(). It is used by the driver's local memory allocation with dma_alloc_coherent(). Tested on TANBAC TB0287(VR4131 + SM501). [Ralf: Fixed reject in dma-default.c and removed the entire #if 0'ed block in dma-mapping.h instead of just the #if 0.] Signed-off-by: Yoichi Yuasa <yoichi_yuasa@tripeaks.co.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | | MIPS: Fix emulation of 64-bit FPU on FPU-less 64-bit CPUs.David Daney2009-11-131-20/+21
|/ / | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Running a 64-bit kernel on a 64-bit CPU without an FPU would cause the emulator to run in 32-bit mode. The c0_Status.FR bit is wired to zero on systems without an FPU, so using that bit to decide how the emulator behaves doesn't allow for proper emulation on 64-bit FPU-less processors. Instead, we need to select the emulator mode based on the user-space ABI. Since the thread flag TIF_32BIT_REGS is used to set c0_Status.FR, we can just use it to decide if the emulator should be in 32-bit or 64-bit mode. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: O32: Fix ppollArnaud Patard2009-11-021-1/+1
| | | | | | | | | | | | | | | | sys_ppoll syscall needs to use a compat handler on 64bit kernels with o32 user-space. Signed-off-by: Arnaud Patard <apatard@mandriva.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: Oprofile: Rename cpu_type from godson2 to loongson2Wu Zhangjin2009-11-021-1/+1
| | | | | | | | | | | | | | | | | | | | Unify the naming method between kernel and the user-space oprofile tool. Because loongson is used instead of godson in most of the places, we agreed to use loongson instead, which will simplify future maintenance. Signed-off-by: Wu Zhangjin <wuzhangjin@gmail.com> Acked-by: Robert Richter <robert.richter@amd.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: Alchemy: Fix hang with high-frequency edge interruptsManuel Lauss2009-11-021-8/+26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The handle_edge_irq() flowhandler disables edge int sources which occur too fast (i.e. another edge comes in before the irq handler function had a chance to finish). Currently, the mask_ack() callback does not ack the edges in hardware, leading to an endless loop in the flowhandler where it tries to shut up the irq source. When I rewrote the alchemy IRQ code I wrongly assumed the mask_ack() callback was only used by the level flowhandler, hence it omitted the (at the time pointless) edge acks. Turned out I was wrong; so here is a complete mask_ack implementation for Alchemy IC, which fixes the above mentioned problem. Signed-off-by: Manuel Lauss <manuel.lauss@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: TXx9: Fix spi-baseclk valueAtsushi Nemoto2009-11-021-1/+1
| | | | | | | | | | | | | | | | | | | | TXx9 SPI bit rate is calculated by: fBR = fSPI / 2 / (n + 1) (fSPI is SPI master clock freq, i.e. imbusclk freq.) So use imbus_clk / 2 as a spi-baseclk. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: bcm63xx: Set the correct BCM3302 CPU nameFlorian Fainelli2009-11-021-0/+3
| | | | | | | | | | | | | | | | For consistency with other BCM63xx SoC set the CPU name to "Broadcom BCM6338" when actually running on that system. Signed-off-by: Florian Fainelli <florian@openwrt.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: Loongson 2: Set cpu_has_dc_aliases and cpu_icache_snoops_remote_storeZhang Le2009-11-021-2/+1
| | | | | | | | | | | | | | | | | | | | Loongson 2 does not have dcache aliases when is using 16k pages. and the And because Loongson 2 doesn't do SMP , cpu_icache_snoops_remote_store does not matter here. Signed-off-by: Zhang Le <r0bertz@gentoo.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: Avoid potential hazard on Context registerRalf Baechle2009-11-022-0/+4
| | | | | | | | | | | | | | | | | | | | set_saved_sp reads Context register. Avoid reading stale value from earlier incomplete write. Issue found and fixed for head.S by Chris Dearman <chris@mips.com>. Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: Octeon: Use lockless interrupt controller operations when possible.David Daney2009-11-021-36/+178
| | | | | | | | | | | | | | | | Some newer Octeon chips have registers that allow lockless operation of the interrupt controller. Take advantage of them. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: Octeon: Use write_{un,}lock_irq{restore,save} to set irq affinityDavid Daney2009-11-021-4/+6
| | | | | | | | | | | | | | | | Since the locks are used from interrupt context we need the irqsave/irqrestore versions of the locking functions. Signed-off-by: David Daney <ddaney@caviumnetworks.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: Set S-cache linesize to 64-bytes for MTI's S-cacheRalf Baechle2009-11-021-0/+1
| | | | | | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: SMTC: Avoid queing multiple reschedule IPIsJaidev Patwardhan2009-11-022-4/+31
| | | | | | | | | | Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: GCMP: Avoid accessing registers when they are not presentJaidev Patwardhan2009-11-021-3/+13
| | | | | | | | | | Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: GIC: Random fixes and enhancements.Chris Dearman2009-11-025-293/+142
| | | | | | | | | | Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: CMP: Fix memory barriers for correct operation of amon_cpu_startChris Dearman2009-11-021-3/+4
| | | | | | | | | | Signed-off-by: Chris Dearman (chris@mips.com) Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: Fix abs.[sd] and neg.[sd] emulation for NaN operandsNigel Stephens2009-11-022-17/+7
| | | | | | | | | | | | | | This patch ensures that the sign bit is always updated for NaN operands. Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: SPRAM: Clean up support code a littleChris Dearman2009-11-023-10/+12
| | | | | | | | | | Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: 1004K: Enable SPRAM support.Ralf Baechle2009-11-021-0/+1
| | | | | | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: Malta: Enable PCI 2.1 compatibility in PIIX4Ralf Baechle2009-11-021-0/+13
| | | | | | | | | | | | Based on original patch by Chris Dearman <chris@mips.com>. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: Kconfig: Fix duplicate default value for MIPS_L1_CACHE_SHIFT.Ralf Baechle2009-11-021-2/+1
| | | | | | | | Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: MTI: Fix accesses to device registers on MIPS boardsChris Dearman2009-11-021-1/+1
| | | | | | | | | | | | | | | | | | This fixes the remaining problems introduced by f197465384bf7ef1af184c2ed1a4e268911a91e3 (incorrect access length & byteswapping in bigendian mode) Signed-off-by: Chris Dearman <chris@mips.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
* | MIPS: Fix machine check exception in kmap_coherent()Kevin Cernekee2009-11-022-3/+7
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On an SMP system with cache aliases, the following sequence of events may happen: 1) copy_user_highpage() runs on CPU0, invoking kmap_coherent() to create a temporary mapping in the fixmap region 2) copy_page() starts on CPU0 3) CPU1 sends CPU0 an IPI asking CPU0 to run local_r4k_flush_cache_page() 4) CPU0 takes the interrupt, interrupting copy_page() 5) local_r4k_flush_cache_page() on CPU0 calls kmap_coherent() again 6) The second invocation of kmap_coherent() on CPU0 tries to use the same fixmap virtual address that was being used by copy_user_highpage() 7) CPU0 throws a machine check exception for the TLB address conflict Fixed by creating an extra set of fixmap entries for use in interrupt handlers. This prevents fixmap VA conflicts between copy_user_highpage() running in user context, and local_r4k_flush_cache_page() invoked from an SMP IPI. Signed-off-by: Kevin Cernekee <cernekee@gmail.com> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
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