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2010-12-27Merge branch 'master' of ↵David S. Miller1-2/+2
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: net/ipv4/fib_frontend.c
2010-12-26sundance: Fix oopses with corrupted skb_shared_infoJarek Poplawski1-2/+2
Joel Soete reported oopses at the beginning of pppoe connections since v2.6.35. After debugging the bug was found in sundance skb allocation and dma mapping code, where skb_reserve() bytes aren't taken into account. This is an old bug, only uncovered by some change in 2.6.35. Initial debugging patch by: Eric Dumazet <eric.dumazet@gmail.com> Reported-by: Joel Soete <soete.joel@scarlet.be> Tested-by: Joel Soete <soete.joel@scarlet.be> Signed-off-by: Jarek Poplawski <jarkao2@gmail.com> Cc: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-12-22sundance: Program station address into HWDenis Kirjanov1-1/+15
Program adapter's StationAddress register when changing device MAC address Signed-off-by: Denis Kirjanov <dkirjanov@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-12-22sundance: Wrap up acceess to ASICCtrl high word with a macroDenis Kirjanov1-2/+5
Wrap up acceess to ASICCtrl high word with a macro Signed-off-by: Denis Kirjanov <dkirjanov@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-16sundance: Add initial ethtool stats supportDenis Kirjanov1-7/+87
Add ethtool stats support. Signed-off-by: Denis Kirjanov <dkirjanov@kernel.org> Acked-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-09sundance: get_stats proper lockingEric Dumazet1-4/+6
sundance get_stats() should not be run concurrently, add a lock to avoid potential losses. Note: Remove unused rx_lock field Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-10-07sundance: Drop legacy _COMPAT_WITH_OLD_KERNEL includesDenis Kirjanov1-7/+0
Drop legacy includes since 2.4.x Signed-off-by: Denis Kirjanov <dkirjanov@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-22sundance: Use dev_kfree_skb_any() helperDenis Kirjanov1-5/+1
Use dev_kfree_skb_any() helper to free the skb Signed-off-by: Denis Kirjanov <dkirjanov@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-22sundance: Handle DMA mapping errorsDenis Kirjanov1-0/+21
Check for DMA mapping errors. Signed-off-by: Denis Kirjanov <dkirjanov@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-22sundance: Convert to DMA APIDenis Kirjanov1-44/+43
Convert to DMA API Signed-off-by: Denis Kirjanov <dkirjanov@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-09-14sundance: Add power management hooksDenis Kirjanov1-0/+48
This patch to adds support for PM hooks into sundance driver Signed-off-by: Denis Kirjanov <dkirjanov@kernel.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-08-26drivers/net: Remove address use from assignments of function pointersJoe Perches1-1/+1
"foo = &function" is more commonly written "foo = function" Done with coccinelle script: // <smpl> @r@ identifier f; @@ f(...) { ... } @@ identifier r.f; @@ - &f + f // </smpl> drivers/net/tehuti.c used a function and struct with the same name, the function was renamed. Compile tested x86 only. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-14drivers/net: Remove unnecessary returns from void function()sJoe Perches1-5/+0
This patch removes from drivers/net/ all the unnecessary return; statements that precede the last closing brace of void functions. It does not remove the returns that are immediately preceded by a label as gcc doesn't like that. It also does not remove null void functions with return. Done via: $ grep -rP --include=*.[ch] -l "return;\n}" net/ | \ xargs perl -i -e 'local $/ ; while (<>) { s/\n[ \t\n]+return;\n}/\n}/g; print; }' with some cleanups by hand. Compile tested x86 allmodconfig only. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-05-10net: trans_start cleanupsEric Dumazet1-2/+1
Now that core network takes care of trans_start updates, dont do it in drivers themselves, if possible. Drivers can avoid one cache miss (on dev->trans_start) in their start_xmit() handler. Exceptions are NETIF_F_LLTX drivers Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-04-12Merge branch 'master' of ↵David S. Miller1-1/+0
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: drivers/net/stmmac/stmmac_main.c drivers/net/wireless/wl12xx/wl1271_cmd.c drivers/net/wireless/wl12xx/wl1271_main.c drivers/net/wireless/wl12xx/wl1271_spi.c net/core/ethtool.c net/mac80211/scan.c
2010-04-04net: convert multicast list to list_headJiri Pirko1-3/+3
Converts the list and the core manipulating with it to be the same as uc_list. +uses two functions for adding/removing mc address (normal and "global" variant) instead of a function parameter. +removes dev_mcast.c completely. +exposes netdev_hw_addr_list_* macros along with __hw_addr_* functions for manipulation with lists on a sandbox (used in bonding and 80211 drivers) Signed-off-by: Jiri Pirko <jpirko@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-03-30include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo1-1/+0
implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-02-19net: convert multiple drivers to use netdev_for_each_mc_addr, part2Jiri Pirko1-2/+1
Signed-off-by: Jiri Pirko <jpirko@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-02-12net: use netdev_mc_count and netdev_mc_empty when appropriateJiri Pirko1-3/+3
This patch replaces dev->mc_count in all drivers (hopefully I didn't miss anything). Used spatch and did small tweaks and conding style changes when it was suitable. Jirka Signed-off-by: Jiri Pirko <jpirko@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2010-01-08drivers/net/: use DEFINE_PCI_DEVICE_TABLE()Alexey Dobriyan1-1/+1
Use DEFINE_PCI_DEVICE_TABLE() so we get place PCI ids table into correct section in every case. Signed-off-by: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-12-04drivers/net: Move && and || to end of previous lineJoe Perches1-8/+8
Only files where David Miller is the primary git-signer. wireless, wimax, ixgbe, etc are not modified. Compile tested x86 allyesconfig only Not all files compiled (not x86 compatible) Added a few > 80 column lines, which I ignored. Existing checkpatch complaints ignored. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-11-19drivers/net: request_irq - Remove unnecessary leading & from second argJoe Perches1-1/+1
Not as fancy as coccinelle. Checkpatch errors ignored. Compile tested allyesconfig x86, not all files compiled. grep -rPl --include=*.[ch] "\brequest_irq\s*\([^,\)]+,\s*\&" drivers/net | while read file ; do \ perl -i -e 'local $/; while (<>) { s@(\brequest_irq\s*\([^,\)]+,\s*)\&@\1@g ; print ; }' $file ;\ done Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-09-01netdev: convert bulk of drivers to netdev_tx_tStephen Hemminger1-2/+2
In a couple of cases collapse some extra code like: int retval = NETDEV_TX_OK; ... return retval; into return NETDEV_TX_OK; Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-08-13Merge branch 'master' of ↵David S. Miller1-3/+3
master.kernel.org:/pub/scm/linux/kernel/git/davem/net-2.6 Conflicts: arch/microblaze/include/asm/socket.h
2009-07-08Remove multiple KERN_ prefixes from printk formatsJoe Perches1-3/+3
Commit 5fd29d6ccbc98884569d6f3105aeca70858b3e0f ("printk: clean up handling of log-levels and newlines") changed printk semantics. printk lines with multiple KERN_<level> prefixes are no longer emitted as before the patch. <level> is now included in the output on each additional use. Remove all uses of multiple KERN_<level>s in formats. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2009-07-06net: use NETDEV_TX_OK instead of 0 in ndo_start_xmit() functionsPatrick McHardy1-1/+1
This patch is the result of an automatic spatch transformation to convert all ndo_start_xmit() return values of 0 to NETDEV_TX_OK. Some occurences are missed by the automatic conversion, those will be handled in a seperate patch. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-05-28net: use netdev stats in b44, sundance, via-rhine and via-velocityEric Dumazet1-25/+28
Use struct net_device_stats provided in struct net_device instead of private ones. Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-02-27sundance: fix non-constant printk warningsStephen Hemminger1-2/+3
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-02-20sundance: missing parentheses?Roel Kluin1-1/+1
Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2009-01-08sundance: update to net_device_opsStephen Hemminger1-8/+15
Signed-off-by: Stephen Hemminger <shemminger@vyatta.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-11-04drivers/net: Kill now superfluous ->last_rx stores.David S. Miller1-1/+0
The generic packet receive code takes care of setting netdev->last_rx when necessary, for the sake of the bonding ARP monitor. Drivers need not do it any more. Some cases had to be skipped over because the drivers were making use of the ->last_rx value themselves. Signed-off-by: David S. Miller <davem@davemloft.net>
2008-10-28net: convert print_mac to %pMJohannes Berg1-3/+2
This converts pretty much everything to print_mac. There were a few things that had conflicts which I have just dropped for now, no harm done. I've built an allyesconfig with this and looked at the files that weren't built very carefully, but it's a huge patch. Signed-off-by: Johannes Berg <johannes@sipsolutions.net> Signed-off-by: David S. Miller <davem@davemloft.net>
2008-09-25sundance: set carrier status on link change eventsDan Nicholson1-33/+62
Check if the link is available when a changed interrupt has been received and set the carrier status appropriately. The code is copied nearly verbatim from the dl2k module. The link status could be used in more places in the driver, but this is enough to get the carrier status reported to userspace. Fixes kernel bug #7487: http://bugzilla.kernel.org/show_bug.cgi?id=7487 [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: Dan Nicholson <dbn.lists@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jgarzik@redhat.com>
2008-01-29sundance: SIOCDEVPRIVATE pollutionFrancois Romieu1-26/+0
To quote one of my favorite contemporary author: [include/linux/sockios.h] * THESE IOCTLS ARE _DEPRECATED_ AND WILL DISAPPEAR IN 2.5.X -DaveM */ #define SIOCDEVPRIVATE 0x89F0 /* to 89FF */ [...] Gentoo's snmpd trips up over this code when trying to figure if the driver supports the non-SIOCDEVPRIVATE API or not. One can argue over its choice of heuristic but there no reason to make ioctl more ugly than needed. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Cc: Jesse Huang <jesse@icplus.com.tw> Tested-by: Volker Sauer <vsauer@dvs.tu-darmstadt.de> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-12-14sundance fixesAl Viro1-17/+17
* all places where we assign ->addr get cpu_to_le32(pci_map_single(....)), so we ought to convert back to host-endian before doing pci_unmap_single() et.al. * poisoning addresses in netdev_close() should be done _after_ unmapping them, not before it... Signed-off-by: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-11[netdrvr] sundance: fix phy scanning on IP100AJeff Garzik1-3/+11
Based on a based from Jesse Huang <jesse@icplus.com.tw>. Signed-off-by: Jeff Garzik <jeff@garzik.org>
2007-10-11[NET]: Introduce and use print_mac() and DECLARE_MAC_BUF()Joe Perches1-6/+4
This is nicer than the MAC_FMT stuff. Signed-off-by: Joe Perches <joe@perches.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-10-11[NET]: Nuke SET_MODULE_OWNER macro.Ralf Baechle1-1/+0
It's been a useless no-op for long enough in 2.6 so I figured it's time to remove it. The number of people that could object because they're maintaining unified 2.4 and 2.6 drivers is probably rather small. [ Handled drivers added by netdev tree and some missed IRDA cases... -DaveM ] Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Jeff Garzik <jeff@garzik.org> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-08-01[NET]: ethtool_perm_addr only has one implementationMatthew Wilcox1-1/+0
All drivers implement ethtool get_perm_addr the same way -- by calling the generic function. So we can inline the generic function into the caller and avoid going through the drivers. Signed-off-by: Matthew Wilcox <matthew@wil.cx> Signed-off-by: David S. Miller <davem@davemloft.net>
2007-07-13Merge master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6Linus Torvalds1-5/+2
* master.kernel.org:/pub/scm/linux/kernel/git/gregkh/pci-2.6: (34 commits) PCI: Only build PCI syscalls on architectures that want them PCI: limit pci_get_bus_and_slot to domain 0 PCI: hotplug: acpiphp: avoid acpiphp "cannot get bridge info" PCI hotplug failure PCI: hotplug: acpiphp: remove hot plug parameter write to PCI host bridge PCI: hotplug: acpiphp: fix slot poweroff problem on systems without _PS3 PCI: hotplug: pciehp: wait for 1 second after power off slot PCI: pci_set_power_state(): check for PM capabilities earlier PCI: cpci_hotplug: Convert to use the kthread API PCI: add pci_try_set_mwi PCI: pcie: remove SPIN_LOCK_UNLOCKED PCI: ROUND_UP macro cleanup in drivers/pci PCI: remove pci_dac_dma_... APIs PCI: pci-x-pci-express-read-control-interfaces cleanups PCI: Fix typo in include/linux/pci.h PCI: pci_ids, remove double or more empty lines PCI: pci_ids, add atheros and 3com_2 vendors PCI: pci_ids, reorder some entries PCI: i386: traps, change VENDOR to DEVICE PCI: ATM: lanai, change VENDOR to DEVICE PCI: Change all drivers to use pci_device->revision ...
2007-07-12PCI: Change all drivers to use pci_device->revisionAuke Kok1-5/+2
Instead of all drivers reading pci config space to get the revision ID, they can now use the pci_device->revision member. This exposes some issues where drivers where reading a word or a dword for the revision number, and adding useless error-handling around the read. Some drivers even just read it for no purpose of all. In devices where the revision ID is being copied over and used in what appears to be the equivalent of hotpath, I have left the copy code and the cached copy as not to influence the driver's performance. Compile tested with make all{yes,mod}config on x86_64 and i386. Signed-off-by: Auke Kok <auke-jan.h.kok@intel.com> Acked-by: Dave Jones <davej@redhat.com> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
2007-07-11[NET]: Kill eth_copy_and_sum().David S. Miller1-1/+1
It hasn't "summed" anything in over 7 years, and it's just a straight mempcy ala skb_copy_to_linear_data() so just get rid of it. Signed-off-by: David S. Miller <davem@davemloft.net>
2007-05-09remove broken URLs from net drivers' outputMarkus Dahms1-2/+1
Remove broken URLs (www.scyld.com) from network drivers' logging output. URLs in comments and other strings are left intact. Signed-off-by: Markus Dahms <dahms@fh-brandenburg.de> Acked-by: Jesper Juhl <jesper.juhl@gmail.com> Acked-by: Alan Cox <alan@redhat.com> igned-off-by: Adrian Bunk <bunk@stusta.de>
2007-04-26[ETH]: Make eth_type_trans set skb->dev like the other *_type_transArnaldo Carvalho de Melo1-1/+0
One less thing for drivers writers to worry about. Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> Signed-off-by: David S. Miller <davem@davemloft.net>
2006-12-02[PATCH] sundance: use NULL for pointerRandy Dunlap1-2/+2
Use NULL instead of 0 for pointers (cures sparse warnings). drivers/net/sundance.c:1106:16: warning: Using plain integer as NULL pointer drivers/net/sundance.c:1652:16: warning: Using plain integer as NULL pointer Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-02[PATCH] sundance: solve host error problem in low performance embedded ↵Jesse Huang1-3/+23
system when continune down and up Solve host error problem in low performance embedded system when continune down and up. It will cause IP100A DMA TargetAbort. So we need more safe process to up and down IP100A with wait hardware completely stop and software cur_tx/ dirty_tx/cur_task/last_tx be clear. Signed-off-by: Jesse Huang <jesse@icplus.com.tw> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-02[PATCH] sundance: correct initial and close hardware step.Jesse Huang1-0/+8
Correct initial and close hardware step. In some embedded system down and up IP100A will cause DMA crash. We add some for safe down and up IP100A. Signed-off-by: Jesse Huang <jesse@icplus.com.tw> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-02[PATCH] subdance: fix TX Pause bug (reset_tx, intr_handler)Jesse Huang1-2/+14
Fix TX Pause bug (reset_tx, intr_handler). When MaxCollisions occurred, need to re-enable Tx. But just after re-enable, MaxCollisions maybe occurred again and with TxStatusOverflow. This will cause driver can't check new MaxCollisions to re-enable Tx again, because TxStatusOverflow. For this reason, after re-enable Tx, we need to make sure Tx was actually enabled. Signed-off-by: Jesse Huang <jesse@icplus.com.tw> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-12-02[PATCH] sundance: remove TxStartThresh and RxEarlyThreshJesse Huang1-6/+2
For patent issue need to remove TxStartThresh and RxEarlyThresh. This patent is cut-through patent. If use this function, Tx will start to transmit after few data be move in to Tx FIFO. We are not allow to use those function in DFE530/DFE550/DFE580/DL10050/IP100/IP100A. It will decrease a little performance. Signed-off-by: Jesse Huang <jesse@icplus.com.tw> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Jeff Garzik <jeff@garzik.org>
2006-10-05IRQ: Maintain regs pointer globally rather than passing to IRQ handlersDavid Howells1-2/+2
Maintain a per-CPU global "struct pt_regs *" variable which can be used instead of passing regs around manually through all ~1800 interrupt handlers in the Linux kernel. The regs pointer is used in few places, but it potentially costs both stack space and code to pass it around. On the FRV arch, removing the regs parameter from all the genirq function results in a 20% speed up of the IRQ exit path (ie: from leaving timer_interrupt() to leaving do_IRQ()). Where appropriate, an arch may override the generic storage facility and do something different with the variable. On FRV, for instance, the address is maintained in GR28 at all times inside the kernel as part of general exception handling. Having looked over the code, it appears that the parameter may be handed down through up to twenty or so layers of functions. Consider a USB character device attached to a USB hub, attached to a USB controller that posts its interrupts through a cascaded auxiliary interrupt controller. A character device driver may want to pass regs to the sysrq handler through the input layer which adds another few layers of parameter passing. I've build this code with allyesconfig for x86_64 and i386. I've runtested the main part of the code on FRV and i386, though I can't test most of the drivers. I've also done partial conversion for powerpc and MIPS - these at least compile with minimal configurations. This will affect all archs. Mostly the changes should be relatively easy. Take do_IRQ(), store the regs pointer at the beginning, saving the old one: struct pt_regs *old_regs = set_irq_regs(regs); And put the old one back at the end: set_irq_regs(old_regs); Don't pass regs through to generic_handle_irq() or __do_IRQ(). In timer_interrupt(), this sort of change will be necessary: - update_process_times(user_mode(regs)); - profile_tick(CPU_PROFILING, regs); + update_process_times(user_mode(get_irq_regs())); + profile_tick(CPU_PROFILING); I'd like to move update_process_times()'s use of get_irq_regs() into itself, except that i386, alone of the archs, uses something other than user_mode(). Some notes on the interrupt handling in the drivers: (*) input_dev() is now gone entirely. The regs pointer is no longer stored in the input_dev struct. (*) finish_unlinks() in drivers/usb/host/ohci-q.c needs checking. It does something different depending on whether it's been supplied with a regs pointer or not. (*) Various IRQ handler function pointers have been moved to type irq_handler_t. Signed-Off-By: David Howells <dhowells@redhat.com> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
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