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Commit 84787c57 authored by Linus Torvalds's avatar Linus Torvalds
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Merge branch 'akpm' (patches from Andrew) 

Merge yet more updates from Andrew Morton:

 - Oleg's "wait/ptrace: assume __WALL if the child is traced".  It's a
   kernel-based workaround for existing userspace issues.

 - A few hotfixes

 - befs cleanups

 - nilfs2 updates

 - sys_wait() changes

 - kexec updates

 - kdump

 - scripts/gdb updates

 - the last of the MM queue

 - a few other misc things

* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (84 commits)
  kgdb: depends on VT
  drm/amdgpu: make amdgpu_mn_get wait for mmap_sem killable
  drm/radeon: make radeon_mn_get wait for mmap_sem killable
  drm/i915: make i915_gem_mmap_ioctl wait for mmap_sem killable
  uprobes: wait for mmap_sem for write killable
  prctl: make PR_SET_THP_DISABLE wait for mmap_sem killable
  exec: make exec path waiting for mmap_sem killable
  aio: make aio_setup_ring killable
  coredump: make coredump_wait wait for mmap_sem for write killable
  vdso: make arch_setup_additional_pages wait for mmap_sem for write killable
  ipc, shm: make shmem attach/detach wait for mmap_sem killable
  mm, fork: make dup_mmap wait for mmap_sem for write killable
  mm, proc: make clear_refs killable
  mm: make vm_brk killable
  mm, elf: handle vm_brk error
  mm, aout: handle vm_brk failures
  mm: make vm_munmap killable
  mm: make vm_mmap killable
  mm: make mmap_sem for write waits killable for mm syscalls
  MAINTAINERS: add co-maintainer for scripts/gdb
  ...
parents d62a0234 c5d2cac0

Documentation/filesystems/nilfs2.txt

+5 −0
Original line number Diff line number Diff line
@@ -268,3 +268,8 @@ among NILFS2 files can be depicted as follows: 
                                    ( regular file, directory, or symlink )



For detail on the format of each file, please see include/linux/nilfs2_fs.h.



There are no patents or other intellectual property that we protect

with regard to the design of NILFS2.  It is allowed to replicate the

design in hopes that other operating systems could share (mount, read,

write, etc.) data stored in this format.

Documentation/gdb-kernel-debugging.txt

+21 −0
Original line number Diff line number Diff line
@@ -139,6 +139,27 @@ Examples of using the Linux-provided gdb helpers 
      start_comm = "swapper/2\000\000\000\000\000\000"

    }



 o Dig into a radix tree data structure, such as the IRQ descriptors:

    (gdb) print (struct irq_desc)$lx_radix_tree_lookup(irq_desc_tree, 18)

    $6 = {

      irq_common_data = {

        state_use_accessors = 67584,

        handler_data = 0x0 <__vectors_start>,

        msi_desc = 0x0 <__vectors_start>,

        affinity = {{

            bits = {65535}

          }}

      },

      irq_data = {

        mask = 0,

        irq = 18,

        hwirq = 27,

        common = 0xee803d80,

        chip = 0xc0eb0854 <gic_data>,

        domain = 0xee808000,

        parent_data = 0x0 <__vectors_start>,

        chip_data = 0xc0eb0854 <gic_data>

      } <... trimmed ...>



List of commands and functions

------------------------------

Documentation/kdump/gdbmacros.txt

+44 −52
Original line number Diff line number Diff line
@@ -15,15 +15,16 @@ 


define bttnobp

	set $tasks_off=((size_t)&((struct task_struct *)0)->tasks)

	set $pid_off=((size_t)&((struct task_struct *)0)->pids[1].pid_list.next)

	set $pid_off=((size_t)&((struct task_struct *)0)->thread_group.next)

	set $init_t=&init_task

	set $next_t=(((char *)($init_t->tasks).next) - $tasks_off)

	set var $stacksize = sizeof(union thread_union)

	while ($next_t != $init_t)

		set $next_t=(struct task_struct *)$next_t

		printf "\npid %d; comm %s:\n", $next_t.pid, $next_t.comm

		printf "===================\n"

		set var $stackp = $next_t.thread.esp

		set var $stack_top = ($stackp & ~4095) + 4096

		set var $stackp = $next_t.thread.sp

		set var $stack_top = ($stackp & ~($stacksize - 1)) + $stacksize



		while ($stackp < $stack_top)

			if (*($stackp) > _stext && *($stackp) < _sinittext)
@@ -31,13 +32,13 @@ define bttnobp 
			end

			set $stackp += 4

		end

		set $next_th=(((char *)$next_t->pids[1].pid_list.next) - $pid_off)

		set $next_th=(((char *)$next_t->thread_group.next) - $pid_off)

		while ($next_th != $next_t)

			set $next_th=(struct task_struct *)$next_th

			printf "\npid %d; comm %s:\n", $next_t.pid, $next_t.comm

			printf "===================\n"

			set var $stackp = $next_t.thread.esp

			set var $stack_top = ($stackp & ~4095) + 4096

			set var $stackp = $next_t.thread.sp

			set var $stack_top = ($stackp & ~($stacksize - 1)) + stacksize



			while ($stackp < $stack_top)

				if (*($stackp) > _stext && *($stackp) < _sinittext)
@@ -45,7 +46,7 @@ define bttnobp 
				end

				set $stackp += 4

			end

			set $next_th=(((char *)$next_th->pids[1].pid_list.next) - $pid_off)

			set $next_th=(((char *)$next_th->thread_group.next) - $pid_off)

		end

		set $next_t=(char *)($next_t->tasks.next) - $tasks_off

	end
@@ -54,42 +55,44 @@ document bttnobp 
	dump all thread stack traces on a kernel compiled with !CONFIG_FRAME_POINTER

end



define btthreadstack

	set var $pid_task = $arg0



	printf "\npid %d; comm %s:\n", $pid_task.pid, $pid_task.comm

	printf "task struct: "

	print $pid_task

	printf "===================\n"

	set var $stackp = $pid_task.thread.sp

	set var $stacksize = sizeof(union thread_union)

	set var $stack_top = ($stackp & ~($stacksize - 1)) + $stacksize

	set var $stack_bot = ($stackp & ~($stacksize - 1))



	set $stackp = *((unsigned long *) $stackp)

	while (($stackp < $stack_top) && ($stackp > $stack_bot))

		set var $addr = *(((unsigned long *) $stackp) + 1)

		info symbol $addr

		set $stackp = *((unsigned long *) $stackp)

	end

end

document btthreadstack

	 dump a thread stack using the given task structure pointer

end





define btt

	set $tasks_off=((size_t)&((struct task_struct *)0)->tasks)

	set $pid_off=((size_t)&((struct task_struct *)0)->pids[1].pid_list.next)

	set $pid_off=((size_t)&((struct task_struct *)0)->thread_group.next)

	set $init_t=&init_task

	set $next_t=(((char *)($init_t->tasks).next) - $tasks_off)

	while ($next_t != $init_t)

		set $next_t=(struct task_struct *)$next_t

		printf "\npid %d; comm %s:\n", $next_t.pid, $next_t.comm

		printf "===================\n"

		set var $stackp = $next_t.thread.esp

		set var $stack_top = ($stackp & ~4095) + 4096

		set var $stack_bot = ($stackp & ~4095)

		btthreadstack $next_t



		set $stackp = *($stackp)

		while (($stackp < $stack_top) && ($stackp > $stack_bot))

			set var $addr = *($stackp + 4)

			info symbol $addr

			set $stackp = *($stackp)

		end



		set $next_th=(((char *)$next_t->pids[1].pid_list.next) - $pid_off)

		set $next_th=(((char *)$next_t->thread_group.next) - $pid_off)

		while ($next_th != $next_t)

			set $next_th=(struct task_struct *)$next_th

			printf "\npid %d; comm %s:\n", $next_t.pid, $next_t.comm

			printf "===================\n"

			set var $stackp = $next_t.thread.esp

			set var $stack_top = ($stackp & ~4095) + 4096

			set var $stack_bot = ($stackp & ~4095)



			set $stackp = *($stackp)

			while (($stackp < $stack_top) && ($stackp > $stack_bot))

				set var $addr = *($stackp + 4)

				info symbol $addr

				set $stackp = *($stackp)

			end

			set $next_th=(((char *)$next_th->pids[1].pid_list.next) - $pid_off)

			btthreadstack $next_th

			set $next_th=(((char *)$next_th->thread_group.next) - $pid_off)

		end

		set $next_t=(char *)($next_t->tasks.next) - $tasks_off

	end
@@ -101,7 +104,7 @@ end 
define btpid

	set var $pid = $arg0

	set $tasks_off=((size_t)&((struct task_struct *)0)->tasks)

	set $pid_off=((size_t)&((struct task_struct *)0)->pids[1].pid_list.next)

	set $pid_off=((size_t)&((struct task_struct *)0)->thread_group.next)

	set $init_t=&init_task

	set $next_t=(((char *)($init_t->tasks).next) - $tasks_off)

	set var $pid_task = 0
@@ -113,29 +116,18 @@ define btpid 
			set $pid_task = $next_t

		end



		set $next_th=(((char *)$next_t->pids[1].pid_list.next) - $pid_off)

		set $next_th=(((char *)$next_t->thread_group.next) - $pid_off)

		while ($next_th != $next_t)

			set $next_th=(struct task_struct *)$next_th

			if ($next_th.pid == $pid)

				set $pid_task = $next_th

			end

			set $next_th=(((char *)$next_th->pids[1].pid_list.next) - $pid_off)

			set $next_th=(((char *)$next_th->thread_group.next) - $pid_off)

		end

		set $next_t=(char *)($next_t->tasks.next) - $tasks_off

	end



	printf "\npid %d; comm %s:\n", $pid_task.pid, $pid_task.comm

	printf "===================\n"

	set var $stackp = $pid_task.thread.esp

	set var $stack_top = ($stackp & ~4095) + 4096

	set var $stack_bot = ($stackp & ~4095)



	set $stackp = *($stackp)

	while (($stackp < $stack_top) && ($stackp > $stack_bot))

		set var $addr = *($stackp + 4)

		info symbol $addr

		set $stackp = *($stackp)

	end

	btthreadstack $pid_task

end

document btpid

	backtrace of pid
@@ -145,7 +137,7 @@ end 
define trapinfo

	set var $pid = $arg0

	set $tasks_off=((size_t)&((struct task_struct *)0)->tasks)

	set $pid_off=((size_t)&((struct task_struct *)0)->pids[1].pid_list.next)

	set $pid_off=((size_t)&((struct task_struct *)0)->thread_group.next)

	set $init_t=&init_task

	set $next_t=(((char *)($init_t->tasks).next) - $tasks_off)

	set var $pid_task = 0
@@ -157,13 +149,13 @@ define trapinfo 
			set $pid_task = $next_t

		end



		set $next_th=(((char *)$next_t->pids[1].pid_list.next) - $pid_off)

		set $next_th=(((char *)$next_t->thread_group.next) - $pid_off)

		while ($next_th != $next_t)

			set $next_th=(struct task_struct *)$next_th

			if ($next_th.pid == $pid)

				set $pid_task = $next_th

			end

			set $next_th=(((char *)$next_th->pids[1].pid_list.next) - $pid_off)

			set $next_th=(((char *)$next_th->thread_group.next) - $pid_off)

		end

		set $next_t=(char *)($next_t->tasks.next) - $tasks_off

	end

Kbuild

+10 −0
Original line number Diff line number Diff line
@@ -5,6 +5,7 @@ 
# 2) Generate timeconst.h

# 3) Generate asm-offsets.h (may need bounds.h and timeconst.h)

# 4) Check for missing system calls

# 5) Generate constants.py (may need bounds.h)



# Default sed regexp - multiline due to syntax constraints

define sed-y
@@ -96,5 +97,14 @@ quiet_cmd_syscalls = CALL $< 
missing-syscalls: scripts/checksyscalls.sh $(offsets-file) FORCE

	$(call cmd,syscalls)



#####

# 5) Generate constants for Python GDB integration

#



extra-$(CONFIG_GDB_SCRIPTS) += build_constants_py



build_constants_py: $(obj)/$(timeconst-file) $(obj)/$(bounds-file)

	@$(MAKE) $(build)=scripts/gdb/linux $@



# Keep these three files during make clean

no-clean-files := $(bounds-file) $(offsets-file) $(timeconst-file)

MAINTAINERS

+2 −0
Original line number Diff line number Diff line
@@ -4993,6 +4993,7 @@ F: drivers/scsi/gdt* 


GDB KERNEL DEBUGGING HELPER SCRIPTS

M:	Jan Kiszka <jan.kiszka@siemens.com>

M:	Kieran Bingham <kieran@bingham.xyz>

S:	Supported

F:	scripts/gdb/
@@ -8038,6 +8039,7 @@ NILFS2 FILESYSTEM 
M:	Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>

L:	linux-nilfs@vger.kernel.org

W:	http://nilfs.sourceforge.net/

W:	http://nilfs.osdn.jp/

T:	git git://github.com/konis/nilfs2.git

S:	Supported

F:	Documentation/filesystems/nilfs2.txt