- 10 10月, 2014 2 次提交
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由 Paul McQuade 提交于
Remove 3 brace coding style for any arm of this statement Signed-off-by: NPaul McQuade <paulmcquad@gmail.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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cat /sys/.../pools followed by removal the device leads to: |====================================================== |[ INFO: possible circular locking dependency detected ] |3.17.0-rc4+ #1498 Not tainted |------------------------------------------------------- |rmmod/2505 is trying to acquire lock: | (s_active#28){++++.+}, at: [<c017f754>] kernfs_remove_by_name_ns+0x3c/0x88 | |but task is already holding lock: | (pools_lock){+.+.+.}, at: [<c011494c>] dma_pool_destroy+0x18/0x17c | |which lock already depends on the new lock. |the existing dependency chain (in reverse order) is: | |-> #1 (pools_lock){+.+.+.}: | [<c0114ae8>] show_pools+0x30/0xf8 | [<c0313210>] dev_attr_show+0x1c/0x48 | [<c0180e84>] sysfs_kf_seq_show+0x88/0x10c | [<c017f960>] kernfs_seq_show+0x24/0x28 | [<c013efc4>] seq_read+0x1b8/0x480 | [<c011e820>] vfs_read+0x8c/0x148 | [<c011ea10>] SyS_read+0x40/0x8c | [<c000e960>] ret_fast_syscall+0x0/0x48 | |-> #0 (s_active#28){++++.+}: | [<c017e9ac>] __kernfs_remove+0x258/0x2ec | [<c017f754>] kernfs_remove_by_name_ns+0x3c/0x88 | [<c0114a7c>] dma_pool_destroy+0x148/0x17c | [<c03ad288>] hcd_buffer_destroy+0x20/0x34 | [<c03a4780>] usb_remove_hcd+0x110/0x1a4 The problem is the lock order of pools_lock and kernfs_mutex in dma_pool_destroy() vs show_pools() call path. This patch breaks out the creation of the sysfs file outside of the pools_lock mutex. The newly added pools_reg_lock ensures that there is no race of create vs destroy code path in terms whether or not the sysfs file has to be deleted (and was it deleted before we try to create a new one) and what to do if device_create_file() failed. Signed-off-by: NSebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 19 9月, 2014 1 次提交
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由 Krzysztof Hałasa 提交于
dma_pool_create() needs to unlock the mutex in error case. The bug was introduced in the 3.16 by commit cc6b664a ("mm/dmapool.c: remove redundant NULL check for dev in dma_pool_create()")/ Signed-off-by: NKrzysztof Hałasa <khc@piap.pl> Cc: stable@vger.kernel.org # v3.16 Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 05 6月, 2014 2 次提交
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由 Andy Shevchenko 提交于
Instead of calling an additional routine in dmam_pool_destroy() rely on what dmam_pool_release() is doing. Signed-off-by: NAndy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Daeseok Youn 提交于
"dev" cannot be NULL because it is already checked before calling dma_pool_create(). If dev ever was NULL, the code would oops in dev_to_node() after enabling CONFIG_NUMA. It is possible that some driver is using dev==NULL and has never been run on a NUMA machine. Such a driver is probably outdated, possibly buggy and will need some attention if it starts triggering NULL derefs. Signed-off-by: NDaeseok Youn <daeseok.youn@gmail.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 05 5月, 2014 1 次提交
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由 Hiroshige Sato 提交于
Fix printk typo in dmapool.c Signed-off-by: NHiroshige Sato <sato.vintage@gmail.com> Signed-off-by: NJiri Kosina <jkosina@suse.cz>
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- 12 12月, 2012 1 次提交
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由 Matthieu CASTET 提交于
This can help to catch the case where hardware is writing after dma free. [akpm@linux-foundation.org: tidy code, fix comment, use sizeof(page->offset), use pr_err()] Signed-off-by: NMatthieu Castet <matthieu.castet@parrot.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 11 12月, 2012 1 次提交
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由 Marek Szyprowski 提交于
dmapool always calls dma_alloc_coherent() with GFP_ATOMIC flag, regardless the flags provided by the caller. This causes excessive pruning of emergency memory pools without any good reason. Additionaly, on ARM architecture any driver which is using dmapools will sooner or later trigger the following error: "ERROR: 256 KiB atomic DMA coherent pool is too small! Please increase it with coherent_pool= kernel parameter!". Increasing the coherent pool size usually doesn't help much and only delays such error, because all GFP_ATOMIC DMA allocations are always served from the special, very limited memory pool. This patch changes the dmapool code to correctly use gfp flags provided by the dmapool caller. Reported-by: NSoeren Moch <smoch@web.de> Reported-by: NThomas Petazzoni <thomas.petazzoni@free-electrons.com> Signed-off-by: NMarek Szyprowski <m.szyprowski@samsung.com> Tested-by: NAndrew Lunn <andrew@lunn.ch> Tested-by: NSoeren Moch <smoch@web.de> Cc: stable@vger.kernel.org
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- 31 10月, 2011 2 次提交
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由 Paul Gortmaker 提交于
The removal of the implicitly everywhere module.h and its child includes will reveal this implicit stat.h usage: mm/dmapool.c:108: error: ‘S_IRUGO’ undeclared here (not in a function) Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
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由 Paul Gortmaker 提交于
The files changed within are only using the EXPORT_SYMBOL macro variants. They are not using core modular infrastructure and hence don't need module.h but only the export.h header. Signed-off-by: NPaul Gortmaker <paul.gortmaker@windriver.com>
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- 26 7月, 2011 1 次提交
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由 Maxin B John 提交于
devres uses the pointer value as key after it's freed, which is safe but triggers spurious use-after-free warnings on some static analysis tools. Rearrange code to avoid such warnings. Signed-off-by: NMaxin B. John <maxin.john@gmail.com> Reviewed-by: NRolf Eike Beer <eike-kernel@sf-tec.de> Acked-by: NTejun Heo <tj@kernel.org> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 14 1月, 2011 2 次提交
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由 Andrew Morton 提交于
As it stands this code will degenerate into a busy-wait if the calling task has signal_pending(). Cc: Rolf Eike Beer <eike-kernel@sf-tec.de> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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由 Rolf Eike Beer 提交于
dma_pool_free() scans for the page to free in the pool list holding the pool lock. Then it releases the lock basically to acquire it immediately again. Modify the code to only take the lock once. This will do some additional loops and computations with the lock held in if memory debugging is activated. If it is not activated the only new operations with this lock is one if and one substraction. Signed-off-by: NRolf Eike Beer <eike-kernel@sf-tec.de> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 27 10月, 2010 1 次提交
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由 Dima Zavin 提交于
Buggy drivers (e.g. fsl_udc) could call dma_pool_alloc from atomic context with GFP_KERNEL. In most instances, the first pool_alloc_page call would succeed and the sleeping functions would never be called. This allowed the buggy drivers to slip through the cracks. Add a might_sleep_if() checking for __GFP_WAIT in flags. Signed-off-by: NDima Zavin <dima@android.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 01 7月, 2009 1 次提交
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由 Thomas Gleixner 提交于
show_pools() walks the page_list of a pool w/o protection against the list modifications in alloc/free. Take pool->lock to avoid stomping into nirvana. Signed-off-by: NThomas Gleixner <tglx@linutronix.de> Signed-off-by: NMatthew Wilcox <willy@linux.intel.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 28 4月, 2008 1 次提交
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由 Andi Kleen 提交于
Previously it was only enabled for CONFIG_DEBUG_SLAB. Not hooked into the slub runtime debug configuration, so you currently only get it with CONFIG_SLUB_DEBUG_ON, not plain CONFIG_SLUB_DEBUG Acked-by: NMatthew Wilcox <willy@linux.intel.com> Signed-off-by: NAndi Kleen <ak@suse.de> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 04 12月, 2007 7 次提交
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由 Matthew Wilcox 提交于
The previous implementation simply refused to allocate more than a boundary's worth of data from an entire page. Some users didn't know this, so specified things like SMP_CACHE_BYTES, not realising the horrible waste of memory that this was. It's fairly easy to correct this problem, just by ensuring we don't cross a boundary within a page. This even helps drivers like EHCI (which can't cross a 4k boundary) on machines with larger page sizes. Signed-off-by: NMatthew Wilcox <willy@linux.intel.com> Acked-by: NDavid S. Miller <davem@davemloft.net>
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由 Matthew Wilcox 提交于
Use a list of free blocks within a page instead of using a bitmap. Update documentation to reflect this. As well as being a slight reduction in memory allocation, locked ops and lines of code, it speeds up a transaction processing benchmark by 0.4%. Signed-off-by: NMatthew Wilcox <willy@linux.intel.com>
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由 Matthew Wilcox 提交于
We were missing a copyright statement and license, so add GPLv2, David Brownell's copyright and my copyright. The asm/io.h include was superfluous, but we were missing a few other necessary includes. Signed-off-by: NMatthew Wilcox <willy@linux.intel.com>
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由 Matthew Wilcox 提交于
Check that 'align' is a power of two, like the API specifies. Align 'size' to 'align' correctly -- the current code has an off-by-one. The ALIGN macro in kernel.h doesn't. Signed-off-by: NMatthew Wilcox <willy@linux.intel.com> Acked-by: NDavid S. Miller <davem@davemloft.net>
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由 Matthew Wilcox 提交于
With one trivial change (taking the lock slightly earlier on wakeup from schedule), all uses of the waitq are under the pool lock, so we can use the locked (or __) versions of the wait queue functions, and avoid the extra spinlock. Signed-off-by: NMatthew Wilcox <willy@linux.intel.com> Acked-by: NDavid S. Miller <davem@davemloft.net>
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由 Matthew Wilcox 提交于
Run Lindent and fix all issues reported by checkpatch.pl Signed-off-by: NMatthew Wilcox <willy@linux.intel.com>
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由 Matthew Wilcox 提交于
Signed-off-by: NMatthew Wilcox <willy@linux.intel.com>
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- 02 11月, 2007 1 次提交
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由 Adrian Bunk 提交于
Not architecture specific code should not #include <asm/scatterlist.h>. This patch therefore either replaces them with #include <linux/scatterlist.h> or simply removes them if they were unused. Signed-off-by: NAdrian Bunk <bunk@kernel.org> Signed-off-by: NJens Axboe <jens.axboe@oracle.com>
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- 19 10月, 2007 1 次提交
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由 Stephen Hemminger 提交于
Get rid of sparse related warnings from places that use integer as NULL pointer. [akpm@linux-foundation.org: coding-style fixes] Signed-off-by: NStephen Hemminger <shemminger@linux-foundation.org> Cc: Andi Kleen <ak@suse.de> Cc: Jeff Garzik <jeff@garzik.org> Cc: Matt Mackall <mpm@selenic.com> Cc: Ian Kent <raven@themaw.net> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Davide Libenzi <davidel@xmailserver.org> Cc: Stephen Smalley <sds@tycho.nsa.gov> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 17 10月, 2007 1 次提交
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由 Arjan van de Ven 提交于
Signed-off-by: NArjan van de Ven <arjan@Linux.intel.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 17 7月, 2007 1 次提交
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由 Yinghai Lu 提交于
Using dev_to_node(&dev->dev) to get node, and kmalloc_node to dma buffer on corresponding node dma pool Signed-off-by: NYinghai Lu <yinghai.lu@sun.com> Cc: Andi Kleen <ak@suse.de> Cc: Christoph Lameter <clameter@sgi.com> Cc: David Rientjes <rientjes@google.com> Cc: Greg KH <greg@kroah.com> Signed-off-by: NAndrew Morton <akpm@linux-foundation.org> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 22 5月, 2007 1 次提交
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由 Alexey Dobriyan 提交于
First thing mm.h does is including sched.h solely for can_do_mlock() inline function which has "current" dereference inside. By dealing with can_do_mlock() mm.h can be detached from sched.h which is good. See below, why. This patch a) removes unconditional inclusion of sched.h from mm.h b) makes can_do_mlock() normal function in mm/mlock.c c) exports can_do_mlock() to not break compilation d) adds sched.h inclusions back to files that were getting it indirectly. e) adds less bloated headers to some files (asm/signal.h, jiffies.h) that were getting them indirectly Net result is: a) mm.h users would get less code to open, read, preprocess, parse, ... if they don't need sched.h b) sched.h stops being dependency for significant number of files: on x86_64 allmodconfig touching sched.h results in recompile of 4083 files, after patch it's only 3744 (-8.3%). Cross-compile tested on all arm defconfigs, all mips defconfigs, all powerpc defconfigs, alpha alpha-up arm i386 i386-up i386-defconfig i386-allnoconfig ia64 ia64-up m68k mips parisc parisc-up powerpc powerpc-up s390 s390-up sparc sparc-up sparc64 sparc64-up um-x86_64 x86_64 x86_64-up x86_64-defconfig x86_64-allnoconfig as well as my two usual configs. Signed-off-by: NAlexey Dobriyan <adobriyan@gmail.com> Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
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- 28 4月, 2007 1 次提交
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由 Matthias Kaehlcke 提交于
the DMA pool handler uses a semaphore as mutex. use the mutex API instead of the (binary) semaphore Signed-off-by: NMatthias Kaehlcke <matthias.kaehlcke@gmail.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 10 2月, 2007 1 次提交
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由 Tejun Heo 提交于
Implement device resource management, in short, devres. A device driver can allocate arbirary size of devres data which is associated with a release function. On driver detach, release function is invoked on the devres data, then, devres data is freed. devreses are typed by associated release functions. Some devreses are better represented by single instance of the type while others need multiple instances sharing the same release function. Both usages are supported. devreses can be grouped using devres group such that a device driver can easily release acquired resources halfway through initialization or selectively release resources (e.g. resources for port 1 out of 4 ports). This patch adds devres core including documentation and the following managed interfaces. * alloc/free : devm_kzalloc(), devm_kzfree() * IO region : devm_request_region(), devm_release_region() * IRQ : devm_request_irq(), devm_free_irq() * DMA : dmam_alloc_coherent(), dmam_free_coherent(), dmam_declare_coherent_memory(), dmam_pool_create(), dmam_pool_destroy() * PCI : pcim_enable_device(), pcim_pin_device(), pci_is_managed() * iomap : devm_ioport_map(), devm_ioport_unmap(), devm_ioremap(), devm_ioremap_nocache(), devm_iounmap(), pcim_iomap_table(), pcim_iomap(), pcim_iounmap() Signed-off-by: NTejun Heo <htejun@gmail.com> Signed-off-by: NJeff Garzik <jeff@garzik.org>
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- 14 12月, 2006 1 次提交
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由 Robert P. J. Day 提交于
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 <rmk@arm.linux.org.uk>, Ian Molton <spyro@f2s.com> Cc: Mikael Starvik <starvik@axis.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Greg KH <greg@kroah.com> Cc: Jens Axboe <jens.axboe@oracle.com> Cc: Paul Fulghum <paulkf@microgate.com> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Cc: Karsten Keil <kkeil@suse.de> Cc: Mauro Carvalho Chehab <mchehab@infradead.org> Cc: Jeff Garzik <jeff@garzik.org> Cc: James Bottomley <James.Bottomley@steeleye.com> Cc: Ian Kent <raven@themaw.net> Cc: Steven French <sfrench@us.ibm.com> Cc: David Woodhouse <dwmw2@infradead.org> Cc: Neil Brown <neilb@cse.unsw.edu.au> Cc: Jaroslav Kysela <perex@suse.cz> Cc: Takashi Iwai <tiwai@suse.de> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 08 12月, 2006 2 次提交
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由 Christoph Lameter 提交于
SLAB_KERNEL is an alias of GFP_KERNEL. Signed-off-by: NChristoph Lameter <clameter@sgi.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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由 Christoph Lameter 提交于
SLAB_ATOMIC is an alias of GFP_ATOMIC Signed-off-by: NChristoph Lameter <clameter@sgi.com> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 19 10月, 2006 1 次提交
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由 Cornelia Huck 提交于
Check for device_create_file() return value in dma_pool_create(). Signed-off-by: NCornelia Huck <cornelia.huck@de.ibm.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 28 6月, 2006 1 次提交
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由 Randy Dunlap 提交于
Localize poison values into one header file for better documentation and easier/quicker debugging and so that the same values won't be used for multiple purposes. Use these constants in core arch., mm, driver, and fs code. Signed-off-by: NRandy Dunlap <rdunlap@xenotime.net> Acked-by: NMatt Mackall <mpm@selenic.com> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Andi Kleen <ak@muc.de> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 09 10月, 2005 1 次提交
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由 Al Viro 提交于
- added typedef unsigned int __nocast gfp_t; - replaced __nocast uses for gfp flags with gfp_t - it gives exactly the same warnings as far as sparse is concerned, doesn't change generated code (from gcc point of view we replaced unsigned int with typedef) and documents what's going on far better. Signed-off-by: NAl Viro <viro@zeniv.linux.org.uk> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 11 9月, 2005 1 次提交
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由 Victor Fusco 提交于
Fix the sparse warning "implicit cast to nocast type" Signed-off-by: NVictor Fusco <victor@cetuc.puc-rio.br> Signed-off-by: NDomen Puncer <domen@coderock.org> Signed-off-by: NAndrew Morton <akpm@osdl.org> Signed-off-by: NLinus Torvalds <torvalds@osdl.org>
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- 21 6月, 2005 1 次提交
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由 Yani Ioannou 提交于
Signed-off-by: NYani Ioannou <yani.ioannou@gmail.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@suse.de>
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- 17 4月, 2005 1 次提交
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由 Linus Torvalds 提交于
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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