linux.git/arch/s390/kernel/dumpstack.c, branch v4.12

sched/headers: Prepare for new header dependencies before moving code to

2017-03-02T07:42:36+00:00

We are going to split  out of , which
will have to be picked up from other headers and a couple of .c files.

Create a trivial placeholder  file that just
maps to  to make this patch obviously correct and
bisectable.

Include the new header in the files that are going to need it.

Acked-by: Linus Torvalds 
Cc: Mike Galbraith 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar

sched/headers: Prepare for new header dependencies before moving code to

2017-03-02T07:42:34+00:00

We are going to split  out of , which
will have to be picked up from other headers and a couple of .c files.

Create a trivial placeholder  file that just
maps to  to make this patch obviously correct and
bisectable.

Include the new header in the files that are going to need it.

Acked-by: Linus Torvalds 
Cc: Mike Galbraith 
Cc: Peter Zijlstra 
Cc: Thomas Gleixner 
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Ingo Molnar

s390/dumpstack: use pr_cont within show_stack and die

2016-10-24T08:26:14+00:00

Use pr_cont instead of printk calls also within show_stack and
die in order to avoid extra line breaks.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390/dumpstack: get rid of return_address again

2016-10-17T12:44:33+00:00

With commit ef6000b4c670 ("Disable the __builtin_return_address()
warning globally after all)" the kernel does not warn at all again if
__builtin_return_address(n) is called with n > 0.

Besides the fact that this was a false warning on s390 anyway, due to
the always present backchain, we can now revert commit 5606330627ab
("s390/dumpstack: implement and use return_address()") again, to
simplify the code again.

After all I shouldn't have had return_address() implememted at all to
workaround this issue. So get rid of this again.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390/dumpstack: use pr_cont where appropriate

2016-10-17T12:44:31+00:00

Use pr_cont instead of simple printk calls when lines will be
continued. This fixes the kernel output of various lines printed on
e.g. a warning:

Before:
[    0.840604] Krnl PSW : 0404c00180000000 000000000017d1d2
[    0.840606]  (try_to_wake_up+0x382/0x5e0)

[    0.840610]            R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0
[    0.840611]  RI:0 EA:3

After:
[    0.831772] Krnl PSW : 0404c00180000000 000000000017d14a (try_to_wake_up+0x382/0x5e0)
[    0.831776]            R:0 T:1 IO:0 EX:0 Key:0 M:1 W:0 P:0 AS:3 CC:0 PM:0 RI:0 EA:3

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390/dumpstack: restore reliable indicator for call traces

2016-10-17T12:44:30+00:00

Before merging all different stack tracers the call traces printed had
an indicator if an entry can be considered reliable or not.
Unreliable entries were put in braces, reliable not. Currently all
lines contain these extra braces.

This patch restores the old behaviour by adding an extra "reliable"
parameter to the callback functions. Only show_trace makes currently
use of it.

Before:
[    0.804751] Call Trace:
[    0.804753] ([<000000000017d0e0>] try_to_wake_up+0x318/0x5e0)
[    0.804756] ([<0000000000161d64>] create_worker+0x174/0x1c0)

After:
[    0.804751] Call Trace:
[    0.804753] ([<000000000017d0e0>] try_to_wake_up+0x318/0x5e0)
[    0.804756]  [<0000000000161d64>] create_worker+0x174/0x1c0

Fixes: 758d39ebd3d5 ("s390/dumpstack: merge all four stack tracers")
Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390: stack address vs thread_info

2016-06-28T07:33:00+00:00

Avoid using the address of a process' thread_info structure as the
kernel stack address. This will break as soon as the thread_info
structure will be removed from the stack, and in addition it makes the
code a bit more understandable.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

s390/dumpstack: implement and use return_address()

2016-05-04T14:29:45+00:00

Implement return_address() and use it instead of __builtin_return_address(n).

__builtin_return_address(n) is not guaranteed to work for n > 0,
therefore implement a private return_address() function which walks
the stack frames and returns the proper return address.

This way we get also rid of a compile warning which gcc 6.1 emits and
look like all other architectures.

Signed-off-by: Heiko Carstens 
Signed-off-by: Martin Schwidefsky

Merge branch 'akpm' (patches from Andrew)

2016-03-16T18:51:08+00:00

Merge first patch-bomb from Andrew Morton:

 - some misc things

 - ofs2 updates

 - about half of MM

 - checkpatch updates

 - autofs4 update

* emailed patches from Andrew Morton : (120 commits)
  autofs4: fix string.h include in auto_dev-ioctl.h
  autofs4: use pr_xxx() macros directly for logging
  autofs4: change log print macros to not insert newline
  autofs4: make autofs log prints consistent
  autofs4: fix some white space errors
  autofs4: fix invalid ioctl return in autofs4_root_ioctl_unlocked()
  autofs4: fix coding style line length in autofs4_wait()
  autofs4: fix coding style problem in autofs4_get_set_timeout()
  autofs4: coding style fixes
  autofs: show pipe inode in mount options
  kallsyms: add support for relative offsets in kallsyms address table
  kallsyms: don't overload absolute symbol type for percpu symbols
  x86: kallsyms: disable absolute percpu symbols on !SMP
  checkpatch: fix another left brace warning
  checkpatch: improve UNSPECIFIED_INT test for bare signed/unsigned uses
  checkpatch: warn on bare unsigned or signed declarations without int
  checkpatch: exclude asm volatile from complex macro check
  mm: memcontrol: drop unnecessary lru locking from mem_cgroup_migrate()
  mm: migrate: consolidate mem_cgroup_migrate() calls
  mm/compaction: speed up pageblock_pfn_to_page() when zone is contiguous
  ...

s390: query dynamic DEBUG_PAGEALLOC setting

2016-03-15T23:55:16+00:00

We can use debug_pagealloc_enabled() to check if we can map the identity
mapping with 1MB/2GB pages as well as to print the current setting in
dump_stack.

Signed-off-by: Christian Borntraeger 
Reviewed-by: Heiko Carstens 
Cc: Thomas Gleixner 
Acked-by: David Rientjes 
Cc: Laura Abbott 
Cc: Joonsoo Kim 
Signed-off-by: Andrew Morton 
Signed-off-by: Linus Torvalds