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2020-09-04atm: eni: fix the missed pci_disable_device() for eni_init_one()Jing Xiangfeng1-1/+1
eni_init_one() misses to call pci_disable_device() in an error path. Jump to err_disable to fix it. Fixes: ede58ef28e10 ("atm: remove deprecated use of pci api") Signed-off-by: Jing Xiangfeng <[email protected]> Signed-off-by: Jakub Kicinski <[email protected]>
2020-08-03atm: eni: avoid accessing the data mapped to streaming DMAJia-Ju Bai1-1/+3
In do_tx(), skb->data is mapped to streaming DMA on line 1111: paddr = dma_map_single(...,skb->data,DMA_TO_DEVICE); Then skb->data is accessed on line 1153: (skb->data[3] & 0xf) This access may cause data inconsistency between CPU cache and hardware. To fix this problem, skb->data[3] is assigned to a local variable before DMA mapping, and then the driver accesses this local variable instead of skb->data[3]. Signed-off-by: Jia-Ju Bai <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2020-07-19net/atm: remove the atmdev_ops {get, set}sockopt methodsChristoph Hellwig1-17/+0
All implementations of these two methods are dummies that always return -EINVAL. Signed-off-by: Christoph Hellwig <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2020-01-27Merge tag 'ioremap-5.6' of git://git.infradead.org/users/hch/ioremapLinus Torvalds1-7/+1
Pull ioremap updates from Christoph Hellwig: "Remove the ioremap_nocache API (plus wrappers) that are always identical to ioremap" * tag 'ioremap-5.6' of git://git.infradead.org/users/hch/ioremap: remove ioremap_nocache and devm_ioremap_nocache MIPS: define ioremap_nocache to ioremap
2020-01-08atm: eni: fix uninitialized variable warningArnd Bergmann1-2/+2
With -O3, gcc has found an actual unintialized variable stored into an mmio register in two instances: drivers/atm/eni.c: In function 'discard': drivers/atm/eni.c:465:13: error: 'dma[1]' is used uninitialized in this function [-Werror=uninitialized] writel(dma[i*2+1],eni_dev->rx_dma+dma_wr*8+4); ^ drivers/atm/eni.c:465:13: error: 'dma[3]' is used uninitialized in this function [-Werror=uninitialized] Change the code to always write zeroes instead. Signed-off-by: Arnd Bergmann <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2020-01-06remove ioremap_nocache and devm_ioremap_nocacheChristoph Hellwig1-7/+1
ioremap has provided non-cached semantics by default since the Linux 2.6 days, so remove the additional ioremap_nocache interface. Signed-off-by: Christoph Hellwig <[email protected]> Acked-by: Arnd Bergmann <[email protected]>
2019-07-30net: Use skb_frag_off accessorsJonathan Lemon1-1/+1
Use accessor functions for skb fragment's page_offset instead of direct references, in preparation for bvec conversion. Signed-off-by: Jonathan Lemon <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2019-05-21treewide: Add SPDX license identifier for more missed filesThomas Gleixner1-0/+1
Add SPDX license identifiers to all files which: - Have no license information of any form - Have MODULE_LICENCE("GPL*") inside which was used in the initial scan/conversion to ignore the file These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2018-10-18atm: eni: Move semicolon to a new line after empty for loopNathan Chancellor1-1/+2
Clang warns: drivers/atm/eni.c:244:48: error: for loop has empty body [-Werror,-Wempty-body] for (order = 0; (1 << order) < *size; order++); ^ drivers/atm/eni.c:244:48: note: put the semicolon on a separate line to silence this warning In this case, that loop is expected to be empty so silence the warning in the way that Clang suggests. Link: https://github.com/ClangBuiltLinux/linux/issues/42 Suggested-by: Masahiro Yamada <[email protected]> Signed-off-by: Nathan Chancellor <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-11-30atm: eni: fix several indentation issuesColin Ian King1-9/+9
There are several statements that have incorrect indentation. Fix these. Signed-off-by: Colin Ian King <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-07-16atm: eni: constify pci_device_id.Arvind Yadav1-1/+1
pci_device_id are not supposed to change at runtime. All functions working with pci_device_id provided by <linux/pci.h> work with const pci_device_id. So mark the non-const structs as const. File size before: text data bss dec hex filename 21565 352 56 21973 55d5 drivers/atm/eni.o File size After adding 'const': text data bss dec hex filename 21661 256 56 21973 55d5 drivers/atm/eni.o Signed-off-by: Arvind Yadav <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2017-02-27lib/vsprintf.c: remove %Z supportAlexey Dobriyan1-5/+1
Now that %z is standartised in C99 there is no reason to support %Z. Unlike %L it doesn't even make format strings smaller. Use BUILD_BUG_ON in a couple ATM drivers. In case anyone didn't notice lib/vsprintf.o is about half of SLUB which is in my opinion is quite an achievement. Hopefully this patch inspires someone else to trim vsprintf.c more. Link: http://lkml.kernel.org/r/20170103230126.GA30170@avx2 Signed-off-by: Alexey Dobriyan <[email protected]> Cc: Andy Shevchenko <[email protected]> Cc: Rasmus Villemoes <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-12-29drivers: atm: eni: rename macro DAUGTHER_ID to fix spelling mistakeColin Ian King1-1/+1
Rename DAUGTHER_ID to DAUGHTER_ID to fix spelling mistake Signed-off-by: Colin Ian King <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2016-12-24Replace <asm/uaccess.h> with <linux/uaccess.h> globallyLinus Torvalds1-1/+1
This was entirely automated, using the script by Al: PATT='^[[:blank:]]*#[[:blank:]]*include[[:blank:]]*<asm/uaccess.h>' sed -i -e "s!$PATT!#include <linux/uaccess.h>!" \ $(git grep -l "$PATT"|grep -v ^include/linux/uaccess.h) to do the replacement at the end of the merge window. Requested-by: Al Viro <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2016-12-05atm: fix improper return valuePan Bian1-1/+1
It returns variable "error" when ioremap_nocache() returns a NULL pointer. The value of "error" is 0 then, which will mislead the callers to believe that there is no error. This patch fixes the bug, returning "-ENOMEM". Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=189021 Signed-off-by: Pan Bian <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2016-09-09ATM-ENI: Use kmalloc_array() in eni_start()Markus Elfring1-2/+3
* A multiplication for the size determination of a memory allocation indicated that an array data structure should be processed. Thus use the corresponding function "kmalloc_array". This issue was detected by using the Coccinelle software. * Replace the specification of a data structure by a pointer dereference to make the corresponding size determination a bit safer according to the Linux coding style convention. Signed-off-by: Markus Elfring <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2015-01-18atm: remove deprecated use of pci apichas williams - CONTRACTOR1-14/+19
Signed-off-by: Chas Williams - CONTRACTOR <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2014-11-21drivers: atm: eni: Add pci_dma_mapping_error() callTina Johnson1-0/+3
Added a pci_dma_mapping_error() call to check for mapping errors before further using the dma handle. In case of error, control goes to a new label where the incoming skb is freed. Unchecked dma handles were found using Coccinelle: @rule1@ expression e1; identifier x; @@ *x = pci_map_single(...); ... when != pci_dma_mapping_error(e1,x) Signed-off-by: Tina Johnson <[email protected]> Acked-by: Julia Lawall <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2014-08-05drivers: atm: fix %d confusingly prefixed with 0x in format stringsHans Wennborg1-2/+2
Signed-off-by: Hans Wennborg <[email protected]> Acked-by: Chas Williams <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2013-02-27hlist: drop the node parameter from iteratorsSasha Levin1-2/+1
I'm not sure why, but the hlist for each entry iterators were conceived list_for_each_entry(pos, head, member) The hlist ones were greedy and wanted an extra parameter: hlist_for_each_entry(tpos, pos, head, member) Why did they need an extra pos parameter? I'm not quite sure. Not only they don't really need it, it also prevents the iterator from looking exactly like the list iterator, which is unfortunate. Besides the semantic patch, there was some manual work required: - Fix up the actual hlist iterators in linux/list.h - Fix up the declaration of other iterators based on the hlist ones. - A very small amount of places were using the 'node' parameter, this was modified to use 'obj->member' instead. - Coccinelle didn't handle the hlist_for_each_entry_safe iterator properly, so those had to be fixed up manually. The semantic patch which is mostly the work of Peter Senna Tschudin is here: @@ iterator name hlist_for_each_entry, hlist_for_each_entry_continue, hlist_for_each_entry_from, hlist_for_each_entry_rcu, hlist_for_each_entry_rcu_bh, hlist_for_each_entry_continue_rcu_bh, for_each_busy_worker, ax25_uid_for_each, ax25_for_each, inet_bind_bucket_for_each, sctp_for_each_hentry, sk_for_each, sk_for_each_rcu, sk_for_each_from, sk_for_each_safe, sk_for_each_bound, hlist_for_each_entry_safe, hlist_for_each_entry_continue_rcu, nr_neigh_for_each, nr_neigh_for_each_safe, nr_node_for_each, nr_node_for_each_safe, for_each_gfn_indirect_valid_sp, for_each_gfn_sp, for_each_host; type T; expression a,c,d,e; identifier b; statement S; @@ -T b; <+... when != b ( hlist_for_each_entry(a, - b, c, d) S | hlist_for_each_entry_continue(a, - b, c) S | hlist_for_each_entry_from(a, - b, c) S | hlist_for_each_entry_rcu(a, - b, c, d) S | hlist_for_each_entry_rcu_bh(a, - b, c, d) S | hlist_for_each_entry_continue_rcu_bh(a, - b, c) S | for_each_busy_worker(a, c, - b, d) S | ax25_uid_for_each(a, - b, c) S | ax25_for_each(a, - b, c) S | inet_bind_bucket_for_each(a, - b, c) S | sctp_for_each_hentry(a, - b, c) S | sk_for_each(a, - b, c) S | sk_for_each_rcu(a, - b, c) S | sk_for_each_from -(a, b) +(a) S + sk_for_each_from(a) S | sk_for_each_safe(a, - b, c, d) S | sk_for_each_bound(a, - b, c) S | hlist_for_each_entry_safe(a, - b, c, d, e) S | hlist_for_each_entry_continue_rcu(a, - b, c) S | nr_neigh_for_each(a, - b, c) S | nr_neigh_for_each_safe(a, - b, c, d) S | nr_node_for_each(a, - b, c) S | nr_node_for_each_safe(a, - b, c, d) S | - for_each_gfn_sp(a, c, d, b) S + for_each_gfn_sp(a, c, d) S | - for_each_gfn_indirect_valid_sp(a, c, d, b) S + for_each_gfn_indirect_valid_sp(a, c, d) S | for_each_host(a, - b, c) S | for_each_host_safe(a, - b, c, d) S | for_each_mesh_entry(a, - b, c, d) S ) ...+> [[email protected]: drop bogus change from net/ipv4/raw.c] [[email protected]: drop bogus hunk from net/ipv6/raw.c] [[email protected]: checkpatch fixes] [[email protected]: fix warnings] [[email protected]: redo intrusive kvm changes] Tested-by: Peter Senna Tschudin <[email protected]> Acked-by: Paul E. McKenney <[email protected]> Signed-off-by: Sasha Levin <[email protected]> Cc: Wu Fengguang <[email protected]> Cc: Marcelo Tosatti <[email protected]> Cc: Gleb Natapov <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2013-01-03Drivers: atm: remove __dev* attributes.Greg Kroah-Hartman1-9/+9
CONFIG_HOTPLUG is going away as an option. As a result, the __dev* markings need to be removed. This change removes the use of __devinit, __devexit_p, __devinitdata, __devinitconst, and __devexit from these drivers. Based on patches originally written by Bill Pemberton, but redone by me in order to handle some of the coding style issues better, by hand. Cc: Bill Pemberton <[email protected]> Cc: Chas Williams <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2012-10-06sections: fix section conflicts in drivers/atmAndi Kleen1-1/+1
Signed-off-by: Andi Kleen <[email protected]> Cc: Chas Williams <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2012-03-28Remove all #inclusions of asm/system.hDavid Howells1-1/+0
Remove all #inclusions of asm/system.h preparatory to splitting and killing it. Performed with the following command: perl -p -i -e 's!^#\s*include\s*<asm/system[.]h>.*\n!!' `grep -Irl '^#\s*include\s*<asm/system[.]h>' *` Signed-off-by: David Howells <[email protected]>
2012-03-16eni: fix driver remove function and driver probe error path.françois romieu1-35/+63
- add eni_do_release() to balance eni_do_init - turn the zeroes DMA area into a per device data Signed-off-by: Francois Romieu <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2012-03-11drivers/atm/eni.c: ensure arguments to request_irq and free_irq are compatibleJulia Lawall1-1/+1
Convert calls to free_irq so that the second argument is the same as the last argument of the corresponding call to request_irq. Without this property, free_irq does nothing. Signed-off-by: Julia Lawall <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2011-10-19net: add skb frag size accessorsEric Dumazet1-1/+1
To ease skb->truesize sanitization, its better to be able to localize all references to skb frags size. Define accessors : skb_frag_size() to fetch frag size, and skb_frag_size_{set|add|sub}() to manipulate it. Signed-off-by: Eric Dumazet <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2011-08-26atm: convert to SKB paged frag API.Ian Campbell1-1/+2
Signed-off-by: Ian Campbell <[email protected]> Reviewed-by: Konrad Rzeszutek Wilk <[email protected]> Cc: Chas Williams <[email protected]> Cc: [email protected] Cc: [email protected] Signed-off-by: David S. Miller <[email protected]>
2011-07-26atomic: use <linux/atomic.h>Arun Sharma1-1/+1
This allows us to move duplicated code in <asm/atomic.h> (atomic_inc_not_zero() for now) to <linux/atomic.h> Signed-off-by: Arun Sharma <[email protected]> Reviewed-by: Eric Dumazet <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: David Miller <[email protected]> Cc: Eric Dumazet <[email protected]> Acked-by: Mike Frysinger <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2011-04-17atm: eni: Kill set-but-unused variables.David S. Miller1-5/+0
The variable eni_dev is initialized but never subsequently used in these two functions. Signed-off-by: David S. Miller <[email protected]>
2010-12-10atm: correct sysfs 'device' link creation and parent relationshipsDan Williams1-1/+1
The ATM subsystem was incorrectly creating the 'device' link for ATM nodes in sysfs. This led to incorrect device/parent relationships exposed by sysfs and udev. Instead of rolling the 'device' link by hand in the generic ATM code, pass each ATM driver's bus device down to the sysfs code and let sysfs do this stuff correctly. Signed-off-by: Dan Williams <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2010-10-26drivers/atm/eni.c: Remove multiple uses of KERN_<level>Joe Perches1-3/+4
Signed-off-by: Joe Perches <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2010-07-15atm: Convert pci_table entries to PCI_VDEVICE (if PCI_ANY_ID is used)Peter Huewe1-4/+2
This patch converts pci_table entries, where .subvendor=PCI_ANY_ID and .subdevice=PCI_ANY_ID, .class=0 and .class_mask=0, to use the PCI_VDEVICE macro, and thus improves readability. Signed-off-by: Peter Huewe <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2010-04-14drivers: net: use skb_headlen()Eric Dumazet1-1/+1
replaces (skb->len - skb->data_len) occurrences by skb_headlen(skb) Signed-off-by: Eric Dumazet <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2010-03-30include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo1-0/+1
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 <[email protected]> Guess-its-ok-by: Christoph Lameter <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Lee Schermerhorn <[email protected]>
2009-09-30net: Make setsockopt() optlen be unsigned.David S. Miller1-1/+1
This provides safety against negative optlen at the type level instead of depending upon (sometimes non-trivial) checks against this sprinkled all over the the place, in each and every implementation. Based upon work done by Arjan van de Ven and feedback from Linus Torvalds. Signed-off-by: David S. Miller <[email protected]>
2008-09-22drivers/atm: Use DIV_ROUND_UPJulia Lawall1-1/+1
The kernel.h macro DIV_ROUND_UP performs the computation (((n) + (d) - 1) / (d)) but is perhaps more readable. In the case of the file drivers/atm/eni.c, I am a little bit suspicious of the -1 at the end of the affected expression. Please check that that is what is wanted. An extract of the semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @haskernel@ @@ #include <linux/kernel.h> @depends on haskernel@ expression n,d; @@ ( - (n + d - 1) / d + DIV_ROUND_UP(n,d) | - (n + (d - 1)) / d + DIV_ROUND_UP(n,d) ) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP((n),d) + DIV_ROUND_UP(n,d) @depends on haskernel@ expression n,d; @@ - DIV_ROUND_UP(n,(d)) + DIV_ROUND_UP(n,d) // </smpl> Signed-off-by: Julia Lawall <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2007-07-18[ATM]: [drivers] ioremap balanced with iounmapAmol Lad1-4/+15
Signed-off-by: Amol Lad <[email protected]> Signed-off-by: chas williams <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2007-07-11PCI: Change all drivers to use pci_device->revisionAuke Kok1-8/+1
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 <[email protected]> Acked-by: Dave Jones <[email protected]> Signed-off-by: Greg Kroah-Hartman <[email protected]>
2007-04-25[ATM] ENI: Convert to struct timeval to ktime_t.YOSHIFUJI Hideaki1-2/+2
Signed-off-by: YOSHIFUJI Hideaki <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2007-02-11[PATCH] Get rid of "double zeroing" of allocated pagesRobert P. J. Day1-1/+0
Simplify the few instances where a call to "get_zeroed_page()" is closely followed by an unnecessary call to memset() to clear that page. Signed-off-by: Robert P. J. Day <[email protected]> Cc: chas williams <[email protected]> Acked-by: Mauro Carvalho Chehab <[email protected]> Cc: James Bottomley <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-12-13[PATCH] getting rid of all casts of k[cmz]alloc() callsRobert P. J. Day1-2/+2
Run this: #!/bin/sh for f in $(grep -Erl "\([^\)]*\) *k[cmz]alloc" *) ; do echo "De-casting $f..." perl -pi -e "s/ ?= ?\([^\)]*\) *(k[cmz]alloc) *\(/ = \1\(/" $f done And then go through and reinstate those cases where code is casting pointers to non-pointers. And then drop a few hunks which conflicted with outstanding work. Cc: Russell King <[email protected]>, Ian Molton <[email protected]> Cc: Mikael Starvik <[email protected]> Cc: Yoshinori Sato <[email protected]> Cc: Roman Zippel <[email protected]> Cc: Geert Uytterhoeven <[email protected]> Cc: Ralf Baechle <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Kyle McMartin <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Cc: Martin Schwidefsky <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Jeff Dike <[email protected]> Cc: Greg KH <[email protected]> Cc: Jens Axboe <[email protected]> Cc: Paul Fulghum <[email protected]> Cc: Alan Cox <[email protected]> Cc: Karsten Keil <[email protected]> Cc: Mauro Carvalho Chehab <[email protected]> Cc: Jeff Garzik <[email protected]> Cc: James Bottomley <[email protected]> Cc: Ian Kent <[email protected]> Cc: Steven French <[email protected]> Cc: David Woodhouse <[email protected]> Cc: Neil Brown <[email protected]> Cc: Jaroslav Kysela <[email protected]> Cc: Takashi Iwai <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-10-05IRQ: Maintain regs pointer globally rather than passing to IRQ handlersDavid Howells1-1/+1
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 <[email protected]> (cherry picked from 1b16e7ac850969f38b375e511e3fa2f474a33867 commit)
2006-07-02[PATCH] irq-flags: misc drivers: Use the new IRQF_ constantsThomas Gleixner1-1/+1
Signed-off-by: Thomas Gleixner <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Benjamin Herrenschmidt <[email protected]> Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: Linus Torvalds <[email protected]>
2006-06-30Remove obsolete #include <linux/config.h>Jörn Engel1-1/+0
Signed-off-by: Jörn Engel <[email protected]> Signed-off-by: Adrian Bunk <[email protected]>
2005-08-29[NET]: Store skb->timestamp as offset to a base timestampPatrick McHardy1-1/+1
Reduces skb size by 8 bytes on 64-bit. Signed-off-by: Patrick McHardy <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2005-04-24[ATM]: ENI155P error handling fixAndrew Morton1-9/+18
From: Panagiotis Issaris <[email protected]> In the ENI155P device driver in six possible failure cases the requested irq is not being released. In three of the above possible failure cases additionally there seems to be a memory leak. Signed-off-by: Andrew Morton <[email protected]> Signed-off-by: David S. Miller <[email protected]>
2005-04-16Linux-2.6.12-rc2Linus Torvalds1-0/+2299
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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