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* [IPV6]: Make fib6_node subtree depend on IPV6_SUBTREESKim Nordlund2006-12-13
| | | | | | | Make fib6_node 'subtree' depend on IPV6_SUBTREES. Signed-off-by: Kim Nordlund <kim.nordlund@nokia.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SCTP]: Add support for SCTP_CONTEXT socket option.Ivan Skytte Jorgensen2006-12-13
| | | | | | Signed-off-by: Ivan Skytte Jorgensen <isj-sctp@i1.dk> Signed-off-by: Sridhar Samudrala <sri@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SCTP]: Enable auto loading of SCTP when creating an ipv6 SCTP socket.Sridhar Samudrala2006-12-13
| | | | | Signed-off-by: Sridhar Samudrala <sri@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [SCTP]: Handle address add/delete events in a more efficient way.Sridhar Samudrala2006-12-13
| | | | | | | | | | | | | | | | Currently in SCTP, we maintain a local address list by rebuilding the whole list from the device list whenever we get a address add/delete event. This patch fixes it by only adding/deleting the address for which we receive the event. Also removed the sctp_local_addr_lock() which is no longer needed as we now use list_for_each_safe() to traverse this list. This fixes the bugs in sctp_copy_laddrs_xxx() routines where we do copy_to_user() while holding this lock. Signed-off-by: Sridhar Samudrala <sri@us.ibm.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [TCP]: Fix oops caused by __tcp_put_md5sig_pool()David S. Miller2006-12-13
| | | | | | | It should call tcp_free_md5sig_pool() not __tcp_free_md5sig_pool() so that it does proper refcounting. Signed-off-by: David S. Miller <davem@davemloft.net>
* [IPV6]: Fix IPV6_UNICAST_HOPS getsockopt().Brian Haley2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | > Relevant standard (RFC 3493) notes: > > The IPV6_UNICAST_HOPS option may be used with getsockopt() to > determine the hop limit value that the system will use for subsequent > unicast packets sent via that socket. > > I don't reckon -1 could be the hop limit value. -1 means un-initialized. > IMHO, the value from > case 1 (if socket is connected to some destination), otherwise case 2 > (if bound to a scope interface) or ultimately the default hop limit > ought to be returned instead, as it will be most often correct, while > the current behavior is always wrong, unless setsockopt() has been used > first. I don't if some people may think doing a route lookup in > getsockopt might be overly expensive, but at least the two other cases > should be ok, particularly the last one. The following patch seems to work for me, but this code has behaved this way for a while, so don't know if it will break any existing apps. Signed-off-by: Brian Haley <brian.haley@hp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
* [DCCP] ccid3: return value in ccid3_hc_rx_calc_first_liIan McDonald2006-12-13
| | | | | | | | | | | | In a recent patch we introduced invalid return codes which will result in the opposite of what is intended (i.e. send more packets in face of peculiar network conditions). This fixes it by returning ~0 which means not calculated as per dccp_li_hist_calc_i_mean. Signed-off-by: Ian McDonald <ian.mcdonald@jandi.co.nz> Signed-off-by: Arnaldo Carvalho de Melo <acme@mandriva.com>
* [NETFILTER]: {ip,ip6,arp}_tables: fix exponential worst-case search for loopsAl Viro2006-12-13
| | | | | | | | | | | | | | | If we come to node we'd already marked as seen and it's not a part of path (i.e. we don't have a loop right there), we already know that it isn't a part of any loop, so we don't need to revisit it. That speeds the things up if some chain is refered to from several places and kills O(exp(table size)) worst-case behaviour (without sleeping, at that, so if you manage to self-LART that way, you are SOL for a long time)... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NETFILTER]: ip_tables: ipt and ipt_compat checks unificationDmitry Mishin2006-12-13
| | | | | | | | | Matches and targets verification is duplicated in normal and compat processing ways. This patch refactors code in order to remove this. Signed-off-by: Dmitry Mishin <dim@openvz.org> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NETFILTER]: x_tables: add missing try to load conntrack from match/targetsYasuyuki Kozakai2006-12-13
| | | | | | | | | CLUSTERIP, CONNMARK, CONNSECMARK, and connbytes need ip_conntrack or layer 3 protocol module of nf_conntrack. Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NETFILTER]: x_tables: error if ip_conntrack is asked to handle IPv6 packetsYasuyuki Kozakai2006-12-13
| | | | | | | | | | To do that, this makes nf_ct_l3proto_try_module_{get,put} compatible functions. As a result we can remove '#ifdef' surrounds and direct call of need_conntrack(). Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NETFILTER]: nf_nat: fix NF_NAT dependencyYasuyuki Kozakai2006-12-13
| | | | | | | | NF_NAT depends on NF_CONNTRACK_IPV4, not NF_CONNTRACK. Signed-off-by: Yasuyuki Kozakai <yasuyuki.kozakai@toshiba.co.jp> Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [NETFILTER]: Fix INET=n linking errorPatrick McHardy2006-12-13
| | | | | | | | | | | | | | Building with INET=n results in WARNING: "ip_route_output_key" [net/netfilter/nf_conntrack_h323.ko] undefined! The entire code in net/netfilter is only used for IPv4/IPv6 currently, so let it depend on INET. Noticed by Toralf Förster <toralf.foerster@gmx.de>. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2006-12-13
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: [ARM] 4017/1: [Jornada7xx] - Updating Jornada720.c [ARM] 3992/1: i.MX/MX1 CPU Frequency scaling support [ARM] Provide a method to alter the control register [ARM] 4016/1: prefetch macro is wrong wrt gcc's "delete-null-pointer-checks" [ARM] Remove empty fixup function [ARM] 4014/1: include drivers/hid/Kconfig [ARM] 4013/1: clocksource driver for netx [ARM] 4012/1: Clocksource for pxa [ARM] Clean up ioremap code [ARM] Unuse another Linux PTE bit [ARM] Clean up KERNEL_RAM_ADDR [ARM] Add sys_*at syscalls [ARM] 4004/1: S3C24XX: UDC remove implict addition of VA to regs [ARM] Formalise the ARMv6 processor name string [ARM] Handle HWCAP_VFP in VFP support code [ARM] 4011/1: AT91SAM9260: Fix compilation with NAND driver [ARM] 4010/1: AT91SAM9260-EK board: Prepare for MACB Ethernet support
| *-. [ARM] Merge AT91 and devel branchesRussell King2006-12-13
| |\ \ | | | | | | | | | | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * [ARM] 4017/1: [Jornada7xx] - Updating Jornada720.cKristoffer Ericson2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * HP Jornada 720 uses epson 1356 chip for graphics. This chip is compatible with s1d13xxxfb driver. * HP Jornada 720 uses a Microprocessor Control Unit to talk to various hardware. We add it as a platform device in jornada720_init() * We provide pm_suspend() to avoid unresolved symbols in apm.o. We are unable to truly suspend now, hence the stub. * Speaker/microphone enabling got removed because it will be placed in the alsa driver. Signed-off-by: Filip Zyzniewski <(address hidden)> Signed-off-by: Kristoffer Ericson <(address hidden)> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * [ARM] 3992/1: i.MX/MX1 CPU Frequency scaling supportPavel Pisa2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Support to change MX1 CPU frequency at runtime. Tested on PiKRON's PiMX1 board and seems to be fully stable up to 200 MHz end even as low as 8 MHz. Signed-off-by: Pavel Pisa <pisa@cmp.felk.cvut.cz> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * [ARM] Provide a method to alter the control registerRussell King2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | i.MX needs to tweak the control register to support CPU frequency scaling. Rather than have folk blindly try and change the control register by writing to it and then wondering why it doesn't work, provide a method (which is safe for UP only, and therefore only available for UP) to achieve this. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * [ARM] 4016/1: prefetch macro is wrong wrt gcc's "delete-null-pointer-checks"Nicolas Pitre2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | optimization The gcc manual says: |`-fdelete-null-pointer-checks' | Use global dataflow analysis to identify and eliminate useless | checks for null pointers. The compiler assumes that dereferencing | a null pointer would have halted the program. If a pointer is | checked after it has already been dereferenced, it cannot be null. | Enabled at levels `-O2', `-O3', `-Os'. Now the problem can be seen with this test case: #include <linux/prefetch.h> extern void bar(char *x); void foo(char *x) { prefetch(x); if (x) bar(x); } Because the constraint to the inline asm used in the prefetch() macro is a memory operand, gcc assumes that the asm code does dereference the pointer and the delete-null-pointer-checks optimization kicks in. Inspection of generated assembly for the above example shows that bar() is indeed called unconditionally without any test on the value of x. Of course in the prefetch case there is no real dereference and it cannot be assumed that a null pointer would have been caught at that point. This causes kernel oopses with constructs like hlist_for_each_entry() where the list's 'next' content is prefetched before the pointer is tested against NULL, and only when gcc feels like applying this optimization which doesn't happen all the time with more complex code. It appears that the way to prevent delete-null-pointer-checks optimization to occur in this case is to make prefetch() into a static inline function instead of a macro. At least this is what is done on x86_64 where a similar inline asm memory operand is used (I presume they would have seen the same problem if it didn't work) and resulting code for the above example confirms that. An alternative would consist of replacing the memory operand by a register operand containing the pointer, and use the addressing mode explicitly in the asm template. But that would be less optimal than an offsettable memory reference. Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * [ARM] Remove empty fixup functionRussell King2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Empty fixup functions are just a waste of code, and are not necessary. Remote them. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * [ARM] 4014/1: include drivers/hid/KconfigSascha Hauer2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | HID drivers are in their own directory now, so we have to include the Kconfig file for arm. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * [ARM] 4013/1: clocksource driver for netxSascha Hauer2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a clocksource driver for netx systems Signed-off-by: Luotao Fu <lfu@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * [ARM] 4012/1: Clocksource for pxaSascha Hauer2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a clocksource driver for pxa2xx systems Signed-off-by: Luotao Fu <lfu@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Nicolas Pitre <nico@cam.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * [ARM] Clean up ioremap codeRussell King2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Since we're keeping the ioremap code, we might as well keep it as close to the standard kernel as possible. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * [ARM] Unuse another Linux PTE bitRussell King2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | L_PTE_ASID is not really required to be stored in every PTE, since we can identify it via the address passed to set_pte_at(). So, create set_pte_ext() which takes the address of the PTE to set, the Linux PTE value, and the additional CPU PTE bits which aren't encoded in the Linux PTE value. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * [ARM] Clean up KERNEL_RAM_ADDRRussell King2006-12-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Clean up the KERNEL_RAM_ADDR stuff in arch/arm/kernel/head.S to make it clearer what's referring to what. In doing so, remove the usage of __virt_to_phys(), which is not guaranteed to be something that the assembler can parse. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * [ARM] Add sys_*at syscallsRussell King2006-12-09
| | | | | | | | | | | | | | | | | | | | | | | | Later glibc requires the *at syscalls. Add them. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * [ARM] 4004/1: S3C24XX: UDC remove implict addition of VA to regsBen Dooks2006-12-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove the implicit addition of a virtual address to the UDC registers. This should have been done by ioremap() in the driver, not by a static map. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * [ARM] Formalise the ARMv6 processor name stringRussell King2006-12-08
| | | | | | | | | | | | | | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | | * [ARM] Handle HWCAP_VFP in VFP support codeRussell King2006-12-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Don't set HWCAP_VFP in the processor support file; not only does it depend on the processor features, but it also depends on the support code being present. Therefore, only set it if the support code detects that we have a VFP coprocessor attached. Also, move the VFP handling of the coprocessor access register into the VFP support code. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * | [ARM] 4011/1: AT91SAM9260: Fix compilation with NAND driverAndrew Victor2006-12-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add missing include for NAND device support on AT91SAM9260. Signed-off-by: Wojtek Kaniewski <wojtekka@toxygen.net> Signed-off-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * | [ARM] 4010/1: AT91SAM9260-EK board: Prepare for MACB Ethernet supportAndrew Victor2006-12-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add PHY IRQ pin definition for AT91SAM9260-EK board. Signed-off-by: Wojtek Kaniewski <wojtekka@toxygen.net> Signed-off-by: Andrew Victor <andrew@sanpeople.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | | | Merge branch 'release' of ↵Linus Torvalds2006-12-13
|\ \ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/home/ftp/pub/scm/linux/kernel/git/aegl/linux-2.6 * 'release' of master.kernel.org:/home/ftp/pub/scm/linux/kernel/git/aegl/linux-2.6: [IA64] Move sg_dma_{len,address} from pci.h to scatterlist.h
| * | | | [IA64] Move sg_dma_{len,address} from pci.h to scatterlist.hTony Luck2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | IA64 is in a tiny minority providing these defines in pci.h. Almost everyone else has them in scatterlist.h Signed-off-by: Tony Luck <tony.luck@intel.com>
* | | | | Driver core: deprecate PM_LEGACY, default it to NDavid Brownell2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Deprecate the old "legacy" PM API, and more importantly default it to "n". Virtually nothing in-tree uses it any more. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | | | | Driver core: Make platform_device_add_data accept a const pointerScott Wood2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | platform_device_add_data() makes a copy of the data that is given to it, and thus the parameter can be const. This removes a warning when data from get_property() on powerpc is handed to platform_device_add_data(), as get_property() returns a const pointer. Signed-off-by: Scott Wood <scottwood@freescale.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | | | | Driver core: "platform_driver_probe() can save codespace": save codespaceAndrew Morton2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This function can be __init Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: Dmitry Torokhov <dtor@mail.ru> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | | | | DebugFS : file/directory removal fixMathieu Desnoyers2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix file and directory removal in debugfs. Add inotify support for file removal. The following scenario : create dir a create dir a/b cd a/b (some process goes in cwd a/b) rmdir a/b rmdir a fails due to the fact that "a" appears to be non empty. It is because the "b" dentry is not deleted from "a" and still in use. The same problem happens if "b" is a file. d_delete is nice enough to know when it needs to unhash and free the dentry if nothing else is using it or, if someone is using it, to remove it from the hash queues and wait for it to be deleted when it has no users. The nice side-effect of this fix is that it calls the file removal notification. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | | | | DebugFS : more file/directory creation error handlingMathieu Desnoyers2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Correct dentry count to handle creation errors. This patch puts a dput at the file creation instead of the file removal : lookup_one_len already returns a dentry with reference count of 1. Then, the dget() in simple_mknod increments it when the dentry is associated with a file. In a scenario where simple_create or simple_mkdir returns an error, this would lead to an unwanted increment of the reference counter, therefore making file removal impossible. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | | | | DebugFS : file/directory creation error handlingMathieu Desnoyers2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix error handling of file and directory creation in DebugFS. The error path should release the file system because no _remove will be called for this erroneous creation. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | | | | DebugFS : coding style fixesMathieu Desnoyers2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Minor coding style fixes along the way : 80 cols and a white space. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | | | | DebugFS : inotify create/mkdir supportMathieu Desnoyers2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add inotify create and mkdir events to DebugFS. Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | | | | driver core: delete virtual directory on class_unregister()Akinobu Mita2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Class virtual directory is created as the need arises. But it is not deleted when the class is unregistered. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | | | | Driver core: show "initstate" of moduleKay Sievers2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Show the initialization state(live, coming, going) of the module: $ cat /sys/module/usbcore/initstate live Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | | | | [PATCH] Add missing KORENIX PCI ID'sRussell King2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Oops, sorry about that. Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | [PATCH] Optimize D-cache alias handling on forkRalf Baechle2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Virtually index, physically tagged cache architectures can get away without cache flushing when forking. This patch adds a new cache flushing function flush_cache_dup_mm(struct mm_struct *) which for the moment I've implemented to do the same thing on all architectures except on MIPS where it's a no-op. Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | [PATCH] MIPS: Fix COW D-cache aliasing on forkAtsushi Nemoto2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Provide a custom copy_user_highpage() to deal with aliasing issues on MIPS. It uses kmap_coherent() to map an user page for kernel with same color. Rewrite copy_to_user_page() and copy_from_user_page() with the new interfaces to avoid extra cache flushing. The main part of this patch was originally written by Ralf Baechle; Atushi Nemoto did the the debugging. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | [PATCH] Pass vma argument to copy_user_highpage().Atsushi Nemoto2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To allow a more effective copy_user_highpage() on certain architectures, a vma argument is added to the function and cow_user_page() allowing the implementation of these functions to check for the VM_EXEC bit. The main part of this patch was originally written by Ralf Baechle; Atushi Nemoto did the the debugging. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | [PATCH] Fix COW D-cache aliasing on forkAtsushi Nemoto2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Problem: 1. There is a process containing two thread (T1 and T2). The thread T1 calls fork(). Then dup_mmap() function called on T1 context. static inline int dup_mmap(struct mm_struct *mm, struct mm_struct *oldmm) ... flush_cache_mm(current->mm); ... /* A */ (write-protect all Copy-On-Write pages) ... /* B */ flush_tlb_mm(current->mm); ... 2. When preemption happens between A and B (or on SMP kernel), the thread T2 can run and modify data on COW pages without page fault (modified data will stay in cache). 3. Some time after fork() completed, the thread T2 may cause a page fault by write-protect on a COW page. 4. Then data of the COW page will be copied to newly allocated physical page (copy_cow_page()). It reads data via kernel mapping. The kernel mapping can have different 'color' with user space mapping of the thread T2 (dcache aliasing). Therefore copy_cow_page() will copy stale data. Then the modified data in cache will be lost. In order to allow architecture code to deal with this problem allow architecture code to override copy_user_highpage() by defining __HAVE_ARCH_COPY_USER_HIGHPAGE in <asm/page.h>. The main part of this patch was originally written by Ralf Baechle; Atushi Nemoto did the the debugging. Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* | | | | [PATCH] Add support for Korenix 16C950-based PCI cardsRussell King2006-12-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds initial support to 8250-pci for the Korenix Jetcard PCI serial cards. The JC12xx cards are standard RS232-based serial cards utilising the Oxford 16C950 device. The JC14xx are RS422/RS485-based cards, but in order for these to be supported natively, we will need additional tweaks to the 8250 layers so we can specify some values for the 950's registers. Hence, these two entries are commented out. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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