linux-toradex.git/kernel/printk.c, branch v2.6.28.9

System call wrappers part 27

2009-01-18T18:44:00+00:00

commit 1e7bfb2134dfec37ce04fb3a4ca89299e892d10c upstream.

Signed-off-by: Heiko Carstens 
Signed-off-by: Greg Kroah-Hartman

Make sys_syslog a conditional system call

2009-01-18T18:43:52+00:00

commit f627a741d24f12955fa2d9f8831c3b12860635bd upstream.

Remove the -ENOSYS implementation for !CONFIG_PRINTK and use
the cond_syscall infrastructure instead.

Acked-by: Kyle McMartin 
Signed-off-by: Heiko Carstens 
Signed-off-by: Greg Kroah-Hartman

printk: remove unused code from kernel/printk.c

2008-10-23T19:54:29+00:00

both log_buf_copy() and log_buf_len are unused.

Signed-off-by: Ingo Molnar

Merge branch 'core-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

2008-10-16T22:17:40+00:00

* 'core-v28-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  do_generic_file_read: s/EINTR/EIO/ if lock_page_killable() fails
  softirq, warning fix: correct a format to avoid a warning
  softirqs, debug: preemption check
  x86, pci-hotplug, calgary / rio: fix EBDA ioremap()
  IO resources, x86: ioremap sanity check to catch mapping requests exceeding, fix
  IO resources, x86: ioremap sanity check to catch mapping requests exceeding the BAR sizes
  softlockup: Documentation/sysctl/kernel.txt: fix softlockup_thresh description
  dmi scan: warn about too early calls to dmi_check_system()
  generic: redefine resource_size_t as phys_addr_t
  generic: make PFN_PHYS explicitly return phys_addr_t
  generic: add phys_addr_t for holding physical addresses
  softirq: allocate less vectors
  IO resources: fix/remove printk
  printk: robustify printk, update comment
  printk: robustify printk, fix #2
  printk: robustify printk, fix
  printk: robustify printk

Fixed up conflicts in:
	arch/powerpc/include/asm/types.h
	arch/powerpc/platforms/Kconfig.cputype
manually.

Add kerneldoc documentation for new printk format extensions

2008-10-16T18:21:32+00:00

Add documentation in kerneldoc for new printk format extensions

This patch documents the new %pS/%pF options in printk in kernel doc.

Hope I didn't miss any other extension.

Signed-off-by: Andi Kleen 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Remove Andrew Morton's old email accounts

2008-10-16T18:21:32+00:00

People can use the real name an an index into MAINTAINERS to find the
current email address.

Signed-off-by: Francois Cami 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds

Merge branches 'core/softlockup', 'core/softirq', 'core/resources', 'core/printk' and 'core/misc' into core-v28-for-linus

2008-10-15T10:48:44+00:00

tty: Move tty_write_message out of kernel/printk

2008-10-13T16:51:41+00:00

This is pure tty code so put it in the tty layer where it can be with the
locking relevant material it uses

Signed-off-by: Alan Cox 
Signed-off-by: Linus Torvalds

printk: robustify printk, update comment

2008-08-20T13:39:59+00:00

Remove the comment describing the possibility of printk() deadlocking on
runqueue lock.

Signed-off-by: Jiri Kosina 
Acked-by: Peter Zijlstra 
Signed-off-by: Ingo Molnar

printk: robustify printk, fix #2

2008-08-20T10:22:37+00:00

Dmitry Adamushko reported:

> [*] btw., with DEBUG being enabled, pr_debug() generates [1] when
> debug_smp_processor_id() is used (CONFIG_DEBUG_PREEMPT).
>
> the problem seems to be caused by the following commit:
> commit b845b517b5e3706a3729f6ea83b88ab85f0725b0
> Author: Peter Zijlstra 
> Date:   Fri Aug 8 21:47:09 2008 +0200
>
>     printk: robustify printk
>
>
> wake_up_klogd() -> __get_cpu_var() -> smp_processor_id()
>
> and that's being called from release_console_sem() which is, in turn,
> said to be "may be called from any context" [2]
>
> and in this case, it seems to be called from some non-preemptible
> context (although, it can't be printk()...
> although, I haven't looked carefully yet).
>
> Provided [2], __get_cpu_var() is perhaps not the right solution there.
>
>
> [1]
>
> [ 7697.942005] BUG: using smp_processor_id() in preemptible [00000000] code: syslogd/3542
> [ 7697.942005] caller is wake_up_klogd+0x1b/0x50
> [ 7697.942005] Pid: 3542, comm: syslogd Not tainted 2.6.27-rc3-tip-git #2
> [ 7697.942005] Call Trace:
> [ 7697.942005]  [] debug_smp_processor_id+0xe8/0xf0
> [ 7697.942005]  [] wake_up_klogd+0x1b/0x50
> [ 7697.942005]  [] release_console_sem+0x1e7/0x200
> [ 7697.942005]  [] do_con_write+0xb7/0x1f30
> [ 7697.942005]  [] ? show_trace+0x10/0x20
> [ 7697.942005]  [] ? dump_stack+0x72/0x80
> [ 7697.942005]  [] ? __ratelimit+0xbd/0xe0
> [ 7697.942005]  [] ? debug_smp_processor_id+0xe8/0xf0
> [ 7697.942005]  [] ? wake_up_klogd+0x1b/0x50
> [ 7697.942005]  [] ? release_console_sem+0x1e7/0x200
> [ 7697.942005]  [] con_write+0x19/0x30
> [ 7697.942005]  [] write_chan+0x276/0x3c0
> [ 7697.942005]  [] ? default_wake_function+0x0/0x10
> [ 7697.942005]  [] ? _spin_lock_irqsave+0x22/0x50
> [ 7697.942005]  [] tty_write+0x194/0x260
> [ 7697.942005]  [] ? write_chan+0x0/0x3c0
> [ 7697.942005]  [] redirected_tty_write+0xa4/0xb0
> [ 7697.942005]  [] ? redirected_tty_write+0x0/0xb0
> [ 7697.942005]  [] do_loop_readv_writev+0x52/0x80
> [ 7697.942005]  [] do_readv_writev+0x1bd/0x1d0
> [ 7697.942005]  [] vfs_writev+0x39/0x60
> [ 7697.942005]  [] sys_writev+0x50/0x90
> [ 7697.942005]  [] system_call_fastpath+0x16/0x1b

Signed-off-by: Peter Zijlstra 
Reported-by: Dmitry Adamushko 
Signed-off-by: Ingo Molnar