09 May, 2007
40 commits
-
Currently the size of the per-cpu region reserved to save crash notes is
set by the per-architecture value MAX_NOTE_BYTES. Which in turn is
currently set to 1024 on all supported architectures.While testing ia64 I recently discovered that this value is in fact too
small. The particular setup I was using actually needs 1172 bytes. This
lead to very tedious failure mode where the tail of one elf note would
overwrite the head of another if they ended up being alocated sequentially
by kmalloc, which was often the case.It seems to me that a far better approach is to caclculate the size that
the area needs to be. This patch does just that.If a simpler stop-gap patch for ia64 to be squeezed into 2.6.21(.X) is
needed then this should be as easy as making MAX_NOTE_BYTES larger in
arch/asm-ia64/kexec.h. Perhaps 2048 would be a good choice. However, I
think that the approach in this patch is a much more robust idea.Acked-by: Vivek Goyal
Signed-off-by: Simon Horman
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove artificial maximum 256 loop device that can be created due to a
legacy device number limit. Searching through lkml archive, there are
several instances where users complained about the artificial limit that
the loop driver impose. There is no reason to have such limit.This patch rid the limit entirely and make loop device and associated block
queue instantiation on demand. With on-demand instantiation, it also gives
the benefit of not wasting memory if these devices are not in use (compare
to current implementation that always create 8 loop devices), a net
improvement in both areas. This version is both tested with creation of
large number of loop devices and is compatible with existing losetup/mount
user land tools.There are a number of people who worked on this and provided valuable
suggestions, in no particular order, by:Jens Axboe
Jan Engelhardt
Christoph Hellwig
Thomas MSigned-off-by: Ken Chen
Cc: Jan Engelhardt
Cc: Christoph Hellwig
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Instead of having /dev/port support dependent in multiple places on a
string of preprocessor symbols, define a new configuration directive for
it. This ensures that all four places remain consistent with each other.Signed-off-by: Russell King
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The 82875 EDAC driver enables an otherwise-hidden PCI device, but doesn't
register it as a PCI device properly. Therefore, the device list in
/proc/bus/pci/devices is different than the tree in /sys/bus/pci. This
usually manifests as the X server failing to start, since it expects the
two lists to be consistent.Signed-off-by: Adam Jackson
Cc: Henrique de Moraes Holschuh
Cc: Greg KH
Cc: Alan Cox
Cc: Doug Thompson
Cc: Andi Kleen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove includes of where it is not used/needed.
Suggested by Al Viro.Builds cleanly on x86_64, i386, alpha, ia64, powerpc, sparc,
sparc64, and arm (all 59 defconfigs).Signed-off-by: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add touch_all_softlockup_watchdogs() to allow the softlockup watchdog
timers on all cpus to be updated. This is used to prevent sysrq-t from
generating a spurious watchdog message when generating lots of output.Softlockup watchdogs use sched_clock() as its timebase, which is inherently
per-cpu (at least, when it is measuring unstolen time). Because of this,
it isn't possible for one CPU to directly update the other CPU's timers,
but it is possible to tell the other CPUs to do update themselves
appropriately.Signed-off-by: Jeremy Fitzhardinge
Acked-by: Chris Lalancette
Signed-off-by: Prarit Bhargava
Cc: Rick Lindsley
Cc: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The softlockup watchdog is currently a nuisance in a virtual machine, since
the whole system could have the CPU stolen from it for a long period of
time. While it would be unlikely for a guest domain to be denied timer
interrupts for over 10s, it could happen and any softlockup message would
be completely spurious.Earlier I proposed that sched_clock() return time in unstolen nanoseconds,
which is how Xen and VMI currently implement it. If the softlockup
watchdog uses sched_clock() to measure time, it would automatically ignore
stolen time, and therefore only report when the guest itself locked up.
When running native, sched_clock() returns real-time nanoseconds, so the
behaviour would be unchanged.Note that sched_clock() used this way is inherently per-cpu, so this patch
makes sure that the per-processor watchdog thread initialized its own
timestamp.Signed-off-by: Jeremy Fitzhardinge
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: john stultz
Cc: Zachary Amsden
Cc: James Morris
Cc: Dan Hecht
Cc: Paul Mackerras
Cc: Martin Schwidefsky
Cc: Prarit Bhargava
Cc: Chris Lalancette
Cc: Rick Lindsley
Cc: Eric Dumazet
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Move the timekeeping code out of kernel/timer.c and into
kernel/time/timekeeping.c. I made no cleanups or other changes in transit.[akpm@linux-foundation.org: build fix]
Signed-off-by: John Stultz
Cc: Ingo Molnar
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
struct clocksource is a critical data structure.
Most of its fields are read only, some of them are heavily modified at each
timer interrupt.It makes sense to separate those fields and make sure they all share one
cache line, or at least the minimum for machines with small cache lines.[akpm@linux-foundation.org: build fix]
Signed-off-by: Eric Dumazet
Acked-by: John Stultz
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
An irqaction structure won't be added to an IRQ descriptor irqaction list if
it doesn't agree with other irqactions on the IRQF_PERCPU flag. Don't check
for this flag to change IRQ descriptor `status' for every irqaction added to
the list, Doing the check only for the first irqaction added is enough.Signed-off-by: Ahmed S. Darwish
Cc: Ingo Molnar
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
sysdev.h uses THIS_MODULE so should include .
[akpm@linux-foundation.org: couple of fixes]
Signed-off-by: Ralf Baechle
Cc: Andi Kleen
Cc: Heiko Carstens
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add a new deferrable delayed work init. This can be used to schedule work
that are 'unimportant' when CPU is idle and can be called later, when CPU
eventually comes out of idle.Use this init in cpufreq ondemand governor.
Signed-off-by: Venkatesh Pallipadi
Cc: Dave Jones
Cc: Oleg Nesterov
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Introduce a new flag for timers - deferrable: Timers that work normally
when system is busy. But, will not cause CPU to come out of idle (just to
service this timer), when CPU is idle. Instead, this timer will be
serviced when CPU eventually wakes up with a subsequent non-deferrable
timer.The main advantage of this is to avoid unnecessary timer interrupts when
CPU is idle. If the routine currently called by a timer can wait until
next event without any issues, this new timer can be used to setup timer
event for that routine. This, with dynticks, allows CPUs to be lazy,
allowing them to stay in idle for extended period of time by reducing
unnecesary wakeup and thereby reducing the power consumption.This patch:
Builds this new timer on top of existing timer infrastructure. It uses
last bit in 'base' pointer of timer_list structure to store this deferrable
timer flag. __next_timer_interrupt() function skips over these deferrable
timers when CPU looks for next timer event for which it has to wake up.This is exported by a new interface init_timer_deferrable() that can be
called in place of regular init_timer().[akpm@linux-foundation.org: Privatise a #define]
Signed-off-by: Venkatesh Pallipadi
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: Oleg Nesterov
Cc: Dave Jones
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Update some of the layered parport_driver code to use parport->dev:
- i2c-parport (parent of i2c_adapter)
- spi_butterfly (parent of spi_master, allowing cruft removal)
- lp (creating class_device)
- ppdev (parent of parportN device)
- tipar (creating class_device)There are still drivers that should be updated, like some of the input
drivers; but they won't be any worse off than they are today.Signed-off-by: David Brownell
Cc: Greg KH
Cc: Jean Delvare
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Give legacy parallel ports a platform device in the device tree.
This is a quick and dirty implementation; it doesn't actually convert the
legacy parport code to the device driver model (by splitting out probing from
device creation). But at least parallel port device drivers will finally have
a device to work with.Signed-off-by: Jean Delvare
Signed-off-by: David Brownell
Cc: Greg KH
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Currently a parport_driver can't get a handle on the device node for the
underlying parport (PNPACPI, PCI, etc). That prevents correct placement of
sysfs child nodes, which can affect things like power management.This patch adds a field to "struct parport" pointing to that device node, and
updates non-legacy port drivers to initialize that device pointer. That field
replaces the analagous PCI-only support in parport_pc.[akpm@linux-foundation.org: fix powerpc build]
Signed-off-by: David Brownell
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
setup_irq() releases a desc->lock before calling register_handler_proc(), so
the iteration over the IRQ action list is not protected.(akpm: the check itself is still racy, but at least it probably won't oops
now).Cc: Ingo Molnar
Cc: Thomas Gleixner
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Delete the unused header file include/linux/awe_voice.h, as well as
its corresponding Kbuild entry.Signed-off-by: Robert P. J. Day
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Currently cpuset_exit() changes the exiting task's ->cpuset pointer w/o
taking task_lock(). This can lead to ugly races between attach_task and
cpuset_exit. Details of the races are described at
http://lkml.org/lkml/2007/3/24/132.Patch below closes those races.
Signed-off-by: Srivatsa Vaddagiri
Cc: Paul Jackson
Cc: Balbir Singh
Cc: Paul Menage
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
remove_inode_dquot_ref() can now become static.
Signed-off-by: Adrian Bunk
Acked-by: Jan Kara
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
I was playing with some code that sometimes got a string where a %n
match should have been done where the input string ended, for example
like this:sscanf("abc123", "abc%d%n", &a, &n); /* doesn't work */
sscanf("abc123a", "abc%d%n", &a, &n); /* works */However, the scanf function in the kernel doesn't convert the %n in that
case because it has already matched the complete input after %d and just
completely stops matching then. This patch fixes that.[akpm@linux-foundation.org: cleanups]
Signed-off-by: Johannes Berg
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Robert P. J. Day
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Schedule obsolete OSS drivers for removal.
Signed-off-by: Adrian Bunk
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Additions and removal from tty_drivers list were just done as well as
iterating on it for /proc/tty/drivers generation.testing: modprobe/rmmod loop of simple module which does nothing but
tty_register_driver() vs cat /proc/tty/drivers loopBUG: unable to handle kernel paging request at virtual address 6b6b6b6b
printing eip:
c01cefa7
*pde = 00000000
Oops: 0000 [#1]
PREEMPT
last sysfs file: devices/pci0000:00/0000:00:1d.7/usb5/5-0:1.0/bInterfaceProtocol
Modules linked in: ohci_hcd af_packet e1000 ehci_hcd uhci_hcd usbcore xfs
CPU: 0
EIP: 0060:[] Not tainted VLI
EFLAGS: 00010297 (2.6.21-rc4-mm1 #4)
EIP is at vsnprintf+0x3a4/0x5fc
eax: 6b6b6b6b ebx: f6cb50f2 ecx: 6b6b6b6b edx: fffffffe
esi: c0354700 edi: f6cb6000 ebp: 6b6b6b6b esp: f31f5e68
ds: 007b es: 007b fs: 00d8 gs: 0033 ss: 0068
Process cat (pid: 31864, ti=f31f4000 task=c1998030 task.ti=f31f4000)
Stack: 00000000 c0103f20 c013003a c0103f20 00000000 f6cb50da 0000000a 00000f0e
f6cb50f2 00000010 00000014 ffffffff ffffffff 00000007 c0354753 f6cb50f2
f73e39dc f73e39dc 00000001 c0175416 f31f5ed8 f31f5ed4 0ee00000 f32090bc
Call Trace:
[] restore_nocheck+0x12/0x15
[] mark_held_locks+0x6d/0x86
[] restore_nocheck+0x12/0x15
[] seq_printf+0x2e/0x52
[] show_tty_range+0x35/0x1f3
[] seq_printf+0x2e/0x52
[] show_tty_driver+0x8a/0x1d9
[] seq_read+0x70/0x2ba
[] seq_read+0x0/0x2ba
[] proc_reg_read+0x63/0x9f
[] vfs_read+0x7d/0xb5
[] proc_reg_read+0x0/0x9f
[] sys_read+0x41/0x6a
[] sysenter_past_esp+0x5f/0x99
=======================
Code: 00 8b 4d 04 e9 44 ff ff ff 8d 4d 04 89 4c 24 50 8b 6d 00 81 fd ff 0f 00 00 b8 a4 c1 35 c0 0f 46 e8 8b 54 24 2c 89 e9 89 c8 eb 06 38 00 74 07 40 4a 83 fa ff 75 f4 29 c8 89 c6 8b 44 24 28 89
EIP: [] vsnprintf+0x3a4/0x5fc SS:ESP 0068:f31f5e68Signed-off-by: Alexey Dobriyan
Cc: Alan Cox
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Remove do_sync_file_range() and convert callers to just use
do_sync_mapping_range().Signed-off-by: Mark Fasheh
Cc: Christoph Hellwig
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
cs5535_gpio, add MODULE_DEVICE_TABLE
Signed-off-by: Jiri Slaby
Cc: Ben Gardner
Cc: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
rocket, add MODULE_DEVICE_TABLE
Signed-off-by: Jiri Slaby
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch moves the die notifier handling to common code. Previous
various architectures had exactly the same code for it. Note that the new
code is compiled unconditionally, this should be understood as an appel to
the other architecture maintainer to implement support for it aswell (aka
sprinkling a notify_die or two in the proper place)arm had a notifiy_die that did something totally different, I renamed it to
arm_notify_die as part of the patch and made it static to the file it's
declared and used at. avr32 used to pass slightly less information through
this interface and I brought it into line with the other architectures.[akpm@linux-foundation.org: build fix]
[akpm@linux-foundation.org: fix vmalloc_sync_all bustage]
[bryan.wu@analog.com: fix vmalloc_sync_all in nommu]
Signed-off-by: Christoph Hellwig
Cc:
Cc: Russell King
Signed-off-by: Bryan Wu
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix sparse NULL warnings:
kernel/kprobes.c:915:49: warning: Using plain integer as NULL pointerSigned-off-by: Randy Dunlap
Acked-by: Ananth N Mavinakayanahalli
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
REISER_FS /proc option needs to depend on PROC_FS.
fs/reiserfs/procfs.c: In function 'show_super':
fs/reiserfs/procfs.c:134: error: 'reiserfs_proc_info_data_t' has no member named 'max_hash_collisions'
fs/reiserfs/procfs.c:134: error: 'reiserfs_proc_info_data_t' has no member named 'breads'
fs/reiserfs/procfs.c:135: error: 'reiserfs_proc_info_data_t' has no member named 'bread_miss'
fs/reiserfs/procfs.c:135: error: 'reiserfs_proc_info_data_t' has no member named 'search_by_key'
fs/reiserfs/procfs.c:136: error: 'reiserfs_proc_info_data_t' has no member named 'search_by_key_fs_changed'
fs/reiserfs/procfs.c:136: error: 'reiserfs_proc_info_data_t' has no member named 'search_by_key_restarted'
fs/reiserfs/procfs.c:137: error: 'reiserfs_proc_info_data_t' has no member named 'insert_item_restarted'
fs/reiserfs/procfs.c:137: error: 'reiserfs_proc_info_data_t' has no member named 'paste_into_item_restarted'
fs/reiserfs/procfs.c:138: error: 'reiserfs_proc_info_data_t' has no member named 'cut_from_item_restarted'
fs/reiserfs/procfs.c:139: error: 'reiserfs_proc_info_data_t' has no member named 'delete_solid_item_restarted'
fs/reiserfs/procfs.c:139: error: 'reiserfs_proc_info_data_t' has no member named 'delete_item_restarted'
fs/reiserfs/procfs.c:140: error: 'reiserfs_proc_info_data_t' has no member named 'leaked_oid'
fs/reiserfs/procfs.c:140: error: 'reiserfs_proc_info_data_t' has no member named 'leaves_removable'
fs/reiserfs/procfs.c: In function 'show_per_level':
fs/reiserfs/procfs.c:184: error: 'reiserfs_proc_info_data_t' has no member named 'balance_at'
fs/reiserfs/procfs.c:185: error: 'reiserfs_proc_info_data_t' has no member named 'sbk_read_at'
fs/reiserfs/procfs.c:186: error: 'reiserfs_proc_info_data_t' has no member named 'sbk_fs_changed'
fs/reiserfs/procfs.c:187: error: 'reiserfs_proc_info_data_t' has no member named 'sbk_restarted'
fs/reiserfs/procfs.c:188: error: 'reiserfs_proc_info_data_t' has no member named 'free_at'
fs/reiserfs/procfs.c:189: error: 'reiserfs_proc_info_data_t' has no member named 'items_at'
fs/reiserfs/procfs.c:190: error: 'reiserfs_proc_info_data_t' has no member named 'can_node_be_removed'
fs/reiserfs/procfs.c:191: error: 'reiserfs_proc_info_data_t' has no member named 'lnum'
fs/reiserfs/procfs.c:192: error: 'reiserfs_proc_info_data_t' has no member named 'rnum'
fs/reiserfs/procfs.c:193: error: 'reiserfs_proc_info_data_t' has no member named 'lbytes'
fs/reiserfs/procfs.c:194: error: 'reiserfs_proc_info_data_t' has no member named 'rbytes'
fs/reiserfs/procfs.c:195: error: 'reiserfs_proc_info_data_t' has no member named 'get_neighbors'
fs/reiserfs/procfs.c:196: error: 'reiserfs_proc_info_data_t' has no member named 'get_neighbors_restart'
fs/reiserfs/procfs.c:197: error: 'reiserfs_proc_info_data_t' has no member named 'need_l_neighbor'
fs/reiserfs/procfs.c:197: error: 'reiserfs_proc_info_data_t' has no member named 'need_r_neighbor'
fs/reiserfs/procfs.c: In function 'show_bitmap':
fs/reiserfs/procfs.c:224: error: 'reiserfs_proc_info_data_t' has no member named 'free_block'
fs/reiserfs/procfs.c:225: error: 'reiserfs_proc_info_data_t' has no member named 'scan_bitmap'
fs/reiserfs/procfs.c:226: error: 'reiserfs_proc_info_data_t' has no member named 'scan_bitmap'
fs/reiserfs/procfs.c:227: error: 'reiserfs_proc_info_data_t' has no member named 'scan_bitmap'
fs/reiserfs/procfs.c:228: error: 'reiserfs_proc_info_data_t' has no member named 'scan_bitmap'
fs/reiserfs/procfs.c:229: error: 'reiserfs_proc_info_data_t' has no member named 'scan_bitmap'
fs/reiserfs/procfs.c:230: error: 'reiserfs_proc_info_data_t' has no member named 'scan_bitmap'
fs/reiserfs/procfs.c:230: error: 'reiserfs_proc_info_data_t' has no member named 'scan_bitmap'
fs/reiserfs/procfs.c: In function 'show_journal':
fs/reiserfs/procfs.c:384: error: 'reiserfs_proc_info_data_t' has no member named 'journal'
fs/reiserfs/procfs.c:385: error: 'reiserfs_proc_info_data_t' has no member named 'journal'
fs/reiserfs/procfs.c:386: error: 'reiserfs_proc_info_data_t' has no member named 'journal'
fs/reiserfs/procfs.c:387: error: 'reiserfs_proc_info_data_t' has no member named 'journal'
fs/reiserfs/procfs.c:388: error: 'reiserfs_proc_info_data_t' has no member named 'journal'
fs/reiserfs/procfs.c:389: error: 'reiserfs_proc_info_data_t' has no member named 'journal'
fs/reiserfs/procfs.c:390: error: 'reiserfs_proc_info_data_t' has no member named 'journal'
fs/reiserfs/procfs.c:391: error: 'reiserfs_proc_info_data_t' has no member named 'journal'
fs/reiserfs/procfs.c:392: error: 'reiserfs_proc_info_data_t' has no member named 'journal'
fs/reiserfs/procfs.c:393: error: 'reiserfs_proc_info_data_t' has no member named 'journal'
fs/reiserfs/procfs.c:394: error: 'reiserfs_proc_info_data_t' has no member named 'journal'
fs/reiserfs/procfs.c:395: error: 'reiserfs_proc_info_data_t' has no member named 'journal'
fs/reiserfs/procfs.c:395: error: 'reiserfs_proc_info_data_t' has no member named 'journal'
fs/reiserfs/procfs.c:395: error: 'reiserfs_proc_info_data_t' has no member named 'journal'
fs/reiserfs/procfs.c: In function 'reiserfs_proc_info_init':
fs/reiserfs/procfs.c:504: warning: implicit declaration of function '__PINFO'
fs/reiserfs/procfs.c:504: error: request for member 'lock' in something not a structure or union
fs/reiserfs/procfs.c: In function 'reiserfs_proc_info_done':
fs/reiserfs/procfs.c:544: error: request for member 'lock' in something not a structure or union
fs/reiserfs/procfs.c:545: error: request for member 'exiting' in something not a structure or union
fs/reiserfs/procfs.c:546: error: request for member 'lock' in something not a structure or unionSigned-off-by: Randy Dunlap
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
While researching the tty layer pid leaks I found a weird case in selinux when
we drop a controlling tty because of inadequate permissions we don't do the
normal hangup processing. Which is a problem if it happens the session leader
has exec'd something that can no longer access the tty.We already have code in the kernel to handle this case in the form of the
TIOCNOTTY ioctl. So this patch factors out a helper function that is the
essence of that ioctl and calls it from the selinux code.This removes the inconsistency in handling dropping of a controlling tty and
who knows it might even make some part of user space happy because it received
a SIGHUP it was expecting.In addition since this removes the last user of proc_set_tty outside of
tty_io.c proc_set_tty is made static and removed from tty.hSigned-off-by: Eric W. Biederman
Acked-by: Alan Cox
Cc: James Morris
Cc: Stephen Smalley
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
This patch should contain no functional changes.
At some point I got confused and thought put_pid could not be called while a
spin lock was held. While it may be nice to avoid that to reduce lock hold
times put_pid can be safely called while we hold a spin lock.This patch removes all of the complications from the code introduced by my
misunderstanding, making the code a little more readable.Signed-off-by: Eric W. Biederman
Cc: Alan Cox
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
All of the users of proc_clear_tty are compiled into the kernel so exporting
this symbol appears gratuitous.Signed-off-by: Eric W. Biederman
Cc: Alan Cox
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
The console subsystem already has an idea of a boot console, using the
CON_BOOT flag. The implementation has some flaws though. The major
problem is that presence of a boot console makes register_console() ignore
any other console devices (unless explicitly specified on the kernel
command line).This patch fixes the console selection code to *not* consider a boot
console a full-featured one, so the first non-boot console registering will
become the default console instead. This way the unregister call for the
boot console in the register_console() function actually triggers and the
handover from the boot console to the real console device works smoothly.
Added a printk for the handover, so you know which console device the
output goes to when the boot console stops printing messages.The disable_early_printk() call is obsolete with that patch, explicitly
disabling the early console isn't needed any more as it works automagically
with that patch.I've walked through the tree, dropped all disable_early_printk() instances
found below arch/ and tagged the consoles with CON_BOOT if needed. The
code is tested on x86, sh (thanks to Paul) and mips (thanks to Ralf).Changes to last version: Rediffed against -rc3, adapted to mips cleanups by
Ralf, fixed "udbg-immortal" cmd line arg on powerpc.Signed-off-by: Gerd Hoffmann
Acked-by: Paul Mundt
Acked-by: Ralf Baechle
Cc: Andi Kleen
Cc: Alan Cox
Cc: Richard Henderson
Cc: Ivan Kokshaysky
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Cc: Jeremy Fitzhardinge
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
console.name[] is eight chars, but so is "earlyvga". So when we try to print
console->name when using earlyvga it runs off the end of the string.Make it bigger.
Diagnosed-by: Gerd Hoffmann
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Eternal quest to make
while true; do cat /proc/fs/xfs/stat >/dev/null 2>/dev/null; done
while true; do find /proc -type f 2>/dev/null | xargs cat >/dev/null 2>/dev/null; done
while true; do modprobe xfs; rmmod xfs; donework reliably continues and now kernel oopses in the following way:
BUG: unable to handle ... at virtual address 6b6b6b6b
EIP is at badness
process: cat
proc_oom_score
proc_info_read
sys_fstat64
vfs_read
proc_info_read
sys_readFailing code is prefetch hidden in list_for_each_entry() in badness().
badness() is reachable from two points. One is proc_oom_score, another
is out_of_memory() => select_bad_process() => badness().Second path grabs tasklist_lock, while first doesn't.
Signed-off-by: Alexey Dobriyan
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
LTP test sigaction_16_24 fails, because it expects sem_wait to be restarted
if SA_RESTART is set. sem_wait is implemented with futex_wait, that
currently doesn't support being restarted. Ulrich confirms that the call
should be restartable.Implement a restart_block method to handle the relative timeout, and allow
restarts.Signed-off-by: Nick Piggin
Cc: Ulrich Drepper
Cc: Rusty Russell
Cc: Roland McGrath
Cc: Oleg Nesterov
Acked-by: Ingo Molnar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
lguest uses the convenient futex infrastructure for inter-domain I/O, so
expose get_futex_key, get_key_refs (renamed get_futex_key_refs) and
drop_key_refs (renamed drop_futex_key_refs). Also means we need to expose the
union that these use.No code changes.
Signed-off-by: Rusty Russell
Cc: Andi Kleen
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Signed-off-by: Dale Farnsworth.org
Cc: Alessandro Zummo
Cc: David Brownell
Cc: Jean Delvare
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Add an RTC driver for Ricoh RS5C313 RTC chip.
[akpm@linux-foundation.org: Zillions of coding-style fixes]
[akpm@linux-foundation.org: build fixes]
Signed-off-by: Nobuhiro Iwamatsu
Cc: Alessandro Zummo
Cc: David Brownell
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
