- 23 Jun, 2006 40 commits
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Randy Dunlap authored
Add a chapter on typedefs, copied from an email from Linus to lkml on Feb. 3, 2006. (Subject: Re: [RFC][PATCH 1/5] Virtualization/containers: startup) Signed-off-by:
Randy Dunlap <rdunlap@xenotime.net> Signed-off-by:
Andrew Morton <akpm@osdl.org> Signed-off-by:
Linus Torvalds <torvalds@osdl.org>
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Porpoise authored
When CONFIG_BASE_SAMLL=1, cascade() in may enter the infinite loop. Because of CONFIG_BASE_SMALL=1(TVR_BITS=6 and TVN_BITS=4), the list base->tv5 may cascade into base->tv5. So, the kernel enters the infinite loop in the function cascade(). I created a test module to verify this bug, and a patch to fix it. #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/timer.h> #if 0 #include <linux/kdb.h> #else #define kdb_printf printk #endif #define TVN_BITS (CONFIG_BASE_SMALL ? 4 : 6) #define TVR_BITS (CONFIG_BASE_SMALL ? 6 : 8) #define TVN_SIZE (1 << TVN_BITS) #define TVR_SIZE (1 << TVR_BITS) #define TVN_MASK (TVN_SIZE - 1) #define TVR_MASK (TVR_SIZE - 1) #define TV_SIZE(N) (N*TVN_BITS + TVR_BITS) struct timer_list timer0; struct timer_list dummy_timer1; struct timer_list dummy_timer2; void dummy_timer_fun(unsigned long data) { } unsigned long j=0; void check_timer_base(unsigned long data) { kdb_printf("check_timer_base %08x\n",jiffies); mod_timer(&timer0,(jiffies & (~0xFFF)) + 0x1FFF); } int init_module(void) { init_timer(&timer0); timer0.data = (unsigned long)0; timer0.function = check_timer_base; mod_timer(&timer0,jiffies+1); init_timer(&dummy_timer1); dummy_timer1.data = (unsigned long)0; dummy_timer1.function = dummy_timer_fun; init_timer(&dummy_timer2); dummy_timer2.data = (unsigned long)0; dummy_timer2.function = dummy_timer_fun; j=jiffies; j&=(~((1<<TV_SIZE(3))-1)); j+=(1<<TV_SIZE(3)); j+=(1<<TV_SIZE(4)); kdb_printf("mod_timer %08x\n",j); mod_timer(&dummy_timer1, j ); mod_timer(&dummy_timer2, j ); return 0; } void cleanup_module() { del_timer_sync(&timer0); del_timer_sync(&dummy_timer1); del_timer_sync(&dummy_timer2); } (Cleanups from Oleg) [oleg@tv-sign.ru: use list_replace_init()] Cc: Oleg Nesterov <oleg@tv-sign.ru> Cc: Matt Mackall <mpm@selenic.com> Signed-off-by:Oleg Nesterov <oleg@tv-sign.ru> Signed-off-by:
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Oleg Nesterov authored
list_splice_init(list, head) does unneeded job if it is known that list_empty(head) == 1. We can use list_replace_init() instead. Signed-off-by:
David S. Miller <davem@davemloft.net> Signed-off-by:
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Oleg Nesterov authored
list_replace() is similar to list_replace_rcu(), but unlike list_replace_rcu() it could be used when list_empty(old) == 1 doesn't use barriers Signed-off-by:
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bjdouma authored
Cc: Alexey Dobriyan <adobriyan@gmail.com> Signed-off-by:
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Brent Casavant authored
There are three different IO cards which an SGI IOC4 controller may find itself on. One of these variants does not bring out the IDE and serial signals, so we need to disable attaching the corresponding IOC4 subdrivers to such cards. Cleans up message clutter emitted during device probing. Signed-off-by:
Brent Casavant <bcasavan@sgi.com> Signed-off-by:
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Randy Dunlap authored
Fix one audit kernel-doc description (one parameter was missing). Add audit*.c interfaces to DocBook. Add BSD accounting interfaces to DocBook. Signed-off-by:
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Paul E. McKenney authored
Remove synchronize_kernel() (deprecated 2-APR-2005 in http://lkml.org/lkml/2005/4/3/11) and makes the RCU API inaccessible to non-GPL Linux kernel modules (as was announced more than one year ago in http://lkml.org/lkml/2005/4/3/8). Tested on x86 and ppc64. Signed-off-by:
"Paul E. McKenney" <paulmck@us.ibm.com> Signed-off-by:
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Jes Sorensen authored
kernel/sys.c doesn't have anything in it relying on linux/init.h - remove the include. Signed-off-by:
Jes Sorensen <jes@sgi.com> Signed-off-by:
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Randy Dunlap authored
Provide a checklist of techniques to aid kernel patch submitters in producing healthy patches and in lessening a burden on maintainers. Signed-off-by:
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NeilBrown authored
If invalidate_mapping_pages is called to invalidate a very large mapping (e.g. a very large block device) and if the only active page in that device is near the end (or at least, at a very large index), such as, say, the superblock of an md array, and if that page happens to be locked when invalidate_mapping_pages is called, then pagevec_lookup will return this page and as it is locked, 'next' will be incremented and pagevec_lookup will be called again. and again. and again. while we count from 0 upto a very large number. We should really always set 'next' to 'page->index+1' before going around the loop again, not just if the page isn't locked. Cc: "Steinar H. Gunderson" <sgunderson@bigfoot.com> Signed-off-by:
Neil Brown <neilb@suse.de> Signed-off-by:
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Andrew Morton authored
Cc: Greg KH <greg@kroah.com> Cc: Russell King <rmk@arm.linux.org.uk> Signed-off-by:
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Andrew Morton authored
Put the connector exports at the functions so people can see them in context. Cc: Evgeniy Polyakov <johnpol@2ka.mipt.ru> Cc: Greg KH <greg@kroah.com> Signed-off-by:
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Pekka Enberg authored
Switch an open-coded strstrip() to use the new API. Acked-by:
Corey Minyard <minyard@acm.org> Signed-off-by:
Pekka Enberg <penberg@cs.helsinki.fi> Signed-off-by:
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Pekka Enberg authored
Add a new strstrip() function to lib/string.c for removing leading and trailing whitespace from a string. Cc: Michael Holzheu <holzheu@de.ibm.com> Acked-by:
Ingo Oeser <ioe-lkml@rameria.de> Acked-by:
Joern Engel <joern@wohnheim.fh-wedel.de> Cc: Corey Minyard <minyard@acm.org> Signed-off-by:
Michael Holzheu <HOLZHEU@de.ibm.com> Signed-off-by:
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Matt Helsley authored
Change the license on the process event structure passed between kernel and userspace. Signed-off-by:
Matt Helsley <matthltc@us.ibm.com> Acked-by:
Guillaume Thouvenin <guillaume.thouvenin@bull.net> Acked-by:
Nguyen Anh Quynh <aquynh@gmail.com> Signed-off-by:
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Matt Helsley authored
Move connector header include to precisely where it's needed. Remove unused time.h header file as well. This was leftover from previous iterations of the process events patches. Signed-off-by:
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Hua Zhong authored
The likely() profiling tools show that __alloc_page() causes a lot of misses: ! 132 119193 __alloc_pages():mm/page_alloc.c@937 Because most __alloc_page() calls are not atomic. Signed-off-by:
Hua Zhong <hzhong@gmail.com> Signed-off-by:
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Mingming Cao authored
The percpu counter data type are changed in this set of patches to support more users like ext3 who need more than 32 bit to store the free blocks total in the filesystem. - Generic perpcu counters data type changes. The size of the global counter and local counter were explictly specified using s64 and s32. The global counter is changed from long to s64, while the local counter is changed from long to s32, so we could avoid doing 64 bit update in most cases. - Users of the percpu counters are updated to make use of the new percpu_counter_init() routine now taking an additional parameter to allow users to pass the initial value of the global counter. Signed-off-by:
Mingming Cao <cmm@us.ibm.com> Signed-off-by:
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Ravikiran G Thirumalai authored
- Move percpu_counter routines from mm/swap.c to lib/percpu_counter.c Signed-off-by:
Ravikiran Thirumalai <kiran@scalex86.org> Signed-off-by:
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Laurent MEYER authored
- When setting a sighandler using sigaction() call, if the flag SA_ONSTACK is set and no alternate stack is provided via sigaltstack(), the kernel still try to install the alternate stack. This behavior is the opposite of the one which is documented in Single Unix Specifications V3. - Also when setting an alternate stack using sigaltstack() with the flag SS_DISABLE, the kernel try to install the alternate stack on signal delivery. These two use cases makes the process crash at signal delivery. Signed-off-by:
Laurent Meyer <meyerlau@fr.ibm.com> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: David Howells <dhowells@redhat.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp> Cc: Chris Zankel <chris@zankel.net> Signed-off-by:
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Jesper Juhl authored
Remove redundant casts from NEW_AUX_ENT() arguments in fs/binfmt_elf.c Signed-off-by:
Jesper Juhl <jesper.juhl@gmail.com> Signed-off-by:
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Jesper Juhl authored
Do a CodingStyle cleanup of fs/binfmt_elf.c and also remove some pointless casts of kmalloc() return values in the same file. Signed-off-by:
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Jan Engelhardt authored
Update Documentation/devices.txt with a new version from the LANANA site http://www.lanana.org/docs/device-list/devices-2.6+.txtSigned-off-by:
Jan Engelhardt <jengelh@gmx.de> Cc: Torben Mathiasen <device@lanana.org> Signed-off-by:
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Jonathan McDowell authored
Use the new LED infrastructure to support the 6 LEDs present on the Amstrad Delta. [akpm@osdl.org: cleanup] Signed-off-by:
Jonathan McDowell <noodles@earth.li> Ackde-by:
Richard Purdie <rpurdie@rpsys.net> Cc: Ben Dooks <ben@fluff.org.uk> Signed-off-by:
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Andreas Mohr authored
Signed-off-by:
Andreas Mohr <andi@lisas.de> Signed-off-by:
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Andrew Morton authored
Steven Rostedt <rostedt@goodmis.org> points out that `rsv' here is usually NULL, so we should avoid calling kfree(). Also, fix up some nearby whitespace damage. Signed-off-by:
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Andrew Morton authored
There are a couple of places where JBD has to check to see whether an unneeded memory allocation was performed. Usually it _was_ needed, so we end up calling kfree(NULL). We can micro-optimise that by checking the pointer before calling kfree(). Thanks to Steven Rostedt <rostedt@goodmis.org> for identifying this. Signed-off-by:
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Andreas Mohr authored
The hardirq_ctx and softirq_ctx variables are written to on init only, Signed-off-by:
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Daniel Walker authored
If you get to that point in the code it means that desc->move_irq is set, pending_irq_cpumask[irq] and cpu_online_map should have a value. Still pretty good chance anding those two you'll still have a value. So these two branch predictors should be inverted. Signed-off-by:
Daniel Walker <dwalker@mvista.com> Signed-off-by:
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Jesper Juhl authored
isdn_writebuf_stub() forgets to detect memory allocation and uaccess errors. And when that's fixed, if a error happens the caller will just keep on looping. So change the caller to detect the error, and to return it. Signed-off-by:
Tilman Schmidt <tilman@imap.cc> Signed-off-by:
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Jesper Juhl authored
Fix leak of `rcvmsg' in sc_ioctl(). There are two returns in the switch in sc_ioctl (the SCIOCSTART case) that may leak `rcvmsg'. This patch fixes that by adding a kfree() call at the beginning of that case. Bug found by the coverity checker as #1098 Eric Sesterhenn send me a patch to fix the leak(s) by adding 2 kfree() calls before the returns, I changed that into just a single call at the beginning. Signed-off-by:
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Jesper Juhl authored
Here's a patch for cs46xx that - (mostly) cleans up the cs46xx driver according to CodingStyle - removes a bunch of pointless casts - fixes a small, potential use of uninitialized variable, bug - reduces the size of the compiled code by 36 bytes - reduces the size of the source file by 1831 bytes I know I should probably have split this into bits, but since I only thought of that *after* doing all the edits, splitting it up would have been a royal pain. And since these are all pretty trivial changes I thought I'd just submit the one huge patch and hope people could live with it (if not, then just tell me and I'll split it). The bug fix that's in there may be hard to spot, so I'll point it out. It's the - int val, valsave, mapped, ret; + int val, valsave, ret; + int mapped = 0; bit. Without that change we may use `mapped' uninitialized if, in cs_ioctl, the first test of "if(state)" is false and the second "if(state)" test is true. Signed-off-by:
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Jan Kara authored
Fix possible assertion failure in journal_commit_transaction() on jh->b_next_transaction == NULL (when we are processing BJ_Forget list and buffer is not jbddirty). !jbddirty buffers can be placed on BJ_Forget list for example by journal_forget() or by __dispose_buffer() - generally such buffer means that it has been freed by this transaction. Freed buffers should not be reallocated until the transaction has committed (that's why we have the assertion there) but they *can* be reallocated when the transaction has already been committed to disk and we are just processing the BJ_Forget list (as soon as we remove b_committed_data from the bitmap bh, ext3 will be able to reallocate buffers freed by the committing transaction). So we have to also count with the case that the buffer has been reallocated and b_next_transaction has been already set. And one more subtle point: it can happen that we manage to reallocate the buffer and also mark it jbddirty. Then we also add the freed buffer to the checkpoint list of the committing trasaction. But that should do no harm. Non-jbddirty buffers should be filed to BJ_Reserved and not BJ_Metadata list. It can actually happen that we refile such buffers during the commit phase when we reallocate in the running transaction blocks deleted in committing transaction (and that can happen if the committing transaction already wrote all the data and is just cleaning up BJ_Forget list). Signed-off-by:
Jan Kara <jack@suse.cz> Acked-by:
"Stephen C. Tweedie" <sct@redhat.com> Signed-off-by:
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Ingo Molnar authored
add the __might_sleep() check back to cond_resched(). Signed-off-by:
Ingo Molnar <mingo@elte.hu> Signed-off-by:
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Prasanna Meda authored
Set errorp in dup_fd, it will be used in sys_unshare also. Signed-off-by:
Prasanna Meda <mlp@google.com> Signed-off-by:
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Jean-Luc Leger authored
Default values for boolean and tristate options can only be 'y', 'm' or 'n'. This patch removes wrong default for IP_DCCP_ACKVEC. Signed-off-by:
Jean-Luc Leger <jean-luc.leger@dspnet.fr.eu.org> Cc: Arnaldo Carvalho de Melo <acme@conectiva.com.br> Signed-off-by:
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Jean-Luc Leger authored
Default values for boolean and tristate options can only be 'y', 'm' or 'n'. This patch removes wrong default for USB_ISP116X_HCD, USB_SL811_HCD and USB_SL811_CS. Signed-off-by:
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Jean-Luc Leger authored
Default values for boolean and tristate options can only be 'y', 'm' or 'n'. This patch removes wrong default for SYSCALL_DEBUG. Signed-off-by:
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Jean-Luc Leger authored
Default values for boolean and tristate options can only be 'y', 'm' or 'n'. This patch removes wrong default for SCHED_SMT. Signed-off-by:
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