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* IRQ: Maintain regs pointer globally rather than passing to IRQ handlersDavid Howells2006-10-051-2/+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)
* Merge branch 'upstream-linus' of ↵Linus Torvalds2006-09-241-82/+82
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6 * 'upstream-linus' of master.kernel.org:/pub/scm/linux/kernel/git/jgarzik/netdev-2.6: (217 commits) net/ieee80211: fix more crypto-related build breakage [PATCH] Spidernet: add ethtool -S (show statistics) [NET] GT96100: Delete bitrotting ethernet driver [PATCH] mv643xx_eth: restrict to 32-bit PPC_MULTIPLATFORM [PATCH] Cirrus Logic ep93xx ethernet driver r8169: the MMIO region of the 8167 stands behin BAR#1 e1000, ixgb: Remove pointless wrappers [PATCH] Remove powerpc specific parts of 3c509 driver [PATCH] s2io: Switch to pci_get_device [PATCH] gt96100: move to pci_get_device API [PATCH] ehea: bugfix for register access functions [PATCH] e1000 disable device on PCI error drivers/net/phy/fixed: #if 0 some incomplete code drivers/net: const-ify ethtool_ops declarations [PATCH] ethtool: allow const ethtool_ops [PATCH] sky2: big endian [PATCH] sky2: fiber support [PATCH] sky2: tx pause bug fix drivers/net: Trim trailing whitespace [PATCH] ehea: IBM eHEA Ethernet Device Driver ... Manually resolved conflicts in drivers/net/ixgb/ixgb_main.c and drivers/net/sky2.c related to CHECKSUM_HW/CHECKSUM_PARTIAL changes by commit 84fa7933a33f806bbbaae6775e87459b1ec584c0 that just happened to be next to unrelated changes in this update.
| * drivers/net: const-ify ethtool_ops declarationsJeff Garzik2006-09-131-2/+2
| | | | | | | | Signed-off-by: Jeff Garzik <jeff@garzik.org>
| * drivers/net: Trim trailing whitespaceJeff Garzik2006-09-131-79/+79
| | | | | | | | Signed-off-by: Jeff Garzik <jeff@garzik.org>
| * drivers/net: Remove deprecated use of pci_module_init()Jeff Garzik2006-08-191-1/+1
| | | | | | | | | | | | | | From: Michal Piotrowski <michal.k.k.piotrowski@gmail.com> Signed-off-by: Michal Piotrowski <michal.k.k.piotrowski@gmail.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* | [NET]: Replace CHECKSUM_HW by CHECKSUM_PARTIAL/CHECKSUM_COMPLETEPatrick McHardy2006-09-221-1/+1
|/ | | | | | | | | | | Replace CHECKSUM_HW by CHECKSUM_PARTIAL (for outgoing packets, whose checksum still needs to be completed) and CHECKSUM_COMPLETE (for incoming packets, device supplied full checksum). Patch originally from Herbert Xu, updated by myself for 2.6.18-rc3. Signed-off-by: Patrick McHardy <kaber@trash.net> Signed-off-by: David S. Miller <davem@davemloft.net>
* [netdrvr] Remove Linux-specific changelogs from several Becker template driversJeff Garzik2006-07-051-41/+2
| | | | | | | | | | | | | | | | | | | When in-kernel net drivers branched from Donald Becker's vanilla driver set, in the days before BitKeeper and git, a driver changelog was maintained in the driver source code. These days, the kernel's changelog is far superior and much more accurate, so the in-driver changelogs are removed. Another relic of the Becker/kernel split was version numbering, using "foo-LKx.y.z" notation, resulting in weird version numbers like "1.17b-LK1.1.9". These drivers are for older hardware, and see few changes these days, so the version numbers were all bumped to something more simple. Finally, in xircom_tulip_cb specifically, an additional cleanup removes the always-enabled CARDBUS cpp macro. Signed-off-by: Jeff Garzik <jeff@garzik.org>
* [PATCH] irq-flags: drivers/net: Use the new IRQF_ constantsThomas Gleixner2006-07-021-1/+1
| | | | | | | | | | Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@elte.hu> Cc: "David S. Miller" <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* typo fixes: infomation -> informationAdrian Bunk2006-06-301-1/+1
| | | | Signed-off-by: Adrian Bunk <bunk@stusta.de>
* [PATCH] dl2k needs dma-mapping.hAndrew Morton2006-05-151-0/+1
| | | | | | | | | | | | | | | | | On alpha: drivers/net/dl2k.c: In function `rio_free_tx': drivers/net/dl2k.c:768: error: `DMA_48BIT_MASK' undeclared (first use in this function) drivers/net/dl2k.c:768: error: (Each undeclared identifier is reported only once drivers/net/dl2k.c:768: error: for each function it appears in.) drivers/net/dl2k.c: In function `receive_packet': drivers/net/dl2k.c:896: error: `DMA_48BIT_MASK' undeclared (first use in this function) drivers/net/dl2k.c: In function `rio_close': drivers/net/dl2k.c:1803: error: `DMA_48BIT_MASK' undeclared (first use in this function) Cc: Jeff Garzik <jeff@garzik.org> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
* dl2k: use DMA_48BIT_MASK constantFrancois Romieu2006-05-101-6/+6
| | | | | | | Typo will be harder with this one. Signed-off-by: Francois Romieu <romieu@fr.zoreil.com> Signed-off-by: Stephen Hemminger <shemminger@osdl.org>
* Merge branch 'upstream-fixes'Jeff Garzik2006-03-111-10/+15
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| * [PATCH] dl2k: DMA freeing errorJon Mason2006-03-111-10/+15
| | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes an error in the dl2k driver's DMA mapping/unmapping. The adapter uses the upper 16bits of the DMA address for the buffer size. However, this is not masked off when referencing the DMA address, and can lead to errors by trying to free a DMA address out of range. Thanks, Jon Signed-off-by: Jon Mason <jdmason@us.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
* | Massive net driver const-ification.Arjan van de Ven2006-03-031-2/+2
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* [NET]: Remove gratuitous use of skb->tail in network drivers.David S. Miller2005-06-281-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | Many drivers use skb->tail unnecessarily. In these situations, the code roughly looks like: dev = dev_alloc_skb(...); [optional] skb_reserve(skb, ...); ... skb->tail ... But even if the skb_reserve() happens, skb->data equals skb->tail. So it doesn't make any sense to use anything other than skb->data in these cases. Another case was the s2io.c driver directly mucking with the skb->data and skb->tail pointers. It really just wanted to do an skb_reserve(), so that's what the code was changed to do instead. Another reason I'm making this change as it allows some SKB cleanups I have planned simpler to merge. In those cleanups, skb->head, skb->tail, and skb->end pointers are removed, and replaced with skb->head_room and skb->tail_room integers. Signed-off-by: David S. Miller <davem@davemloft.net> Acked-by: Jeff Garzik <jgarzik@pobox.com>
* Linux-2.6.12-rc2v2.6.12-rc2Linus Torvalds2005-04-161-0/+1872
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
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