Oleg Nesterov 74e37200de proc: cleanup/simplify get_task_state/task_state_array ...

get_task_state() and task_state_array[] look confusing and suboptimal, it
is not clear what it can actually report to user-space and
task_state_array[] blows .data for no reason.

1. state = (tsk->state & TASK_REPORT) | tsk->exit_state is not
   clear. TASK_REPORT is self-documenting but it is not clear
   what ->exit_state can add.

   Move the potential exit_state's (EXIT_ZOMBIE and EXIT_DEAD)
   into TASK_REPORT and use it to calculate the final result.

2. With the change above it is obvious that task_state_array[]
   has the unused entries just to make BUILD_BUG_ON() happy.

   Change this BUILD_BUG_ON() to use TASK_REPORT rather than
   TASK_STATE_MAX and shrink task_state_array[].

3. Turn the "while (state)" loop into fls(state).

Signed-off-by: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: David Laight <David.Laight@ACULAB.COM>
Cc: Geert Uytterhoeven <geert@linux-m68k.org>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Tejun Heo <tj@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

2014-01-23 16:37:01 -08:00

..

array.c

proc: cleanup/simplify get_task_state/task_state_array

2014-01-23 16:37:01 -08:00

base.c

audit: allow unsetting the loginuid (with priv)

2013-11-05 11:08:09 -05:00

cmdline.c

proc: switch /proc/cmdline to seq_file

2008-10-23 14:29:04 +04:00

consoles.c

seq_file: remove "%n" usage from seq_file users

2013-11-15 09:32:20 +09:00

cpuinfo.c

proc: move /proc/cpuinfo code to fs/proc/cpuinfo.c

2008-10-23 15:05:11 +04:00

devices.c

proc: use seq_puts()/seq_putc() where possible

2011-01-13 08:03:16 -08:00

fd.c

proc: make proc_fd_permission() thread-friendly

2013-09-11 15:59:03 -07:00

fd.h

proc: Move proc_fd() to fs/proc/fd.h

2013-05-01 17:29:39 -04:00

generic.c

consolidate simple ->d_delete() instances

2013-11-15 22:04:17 -05:00

inode.c

procfs: also fix proc_reg_get_unmapped_area() for !MMU case

2013-12-12 18:19:26 -08:00

internal.h

proc_fill_cache(): just make instantiate_t return int

2013-06-29 12:57:18 +04:00

interrupts.c

proc: move /proc/interrupts boilerplate code to fs/proc/interrupts.c

2008-10-23 15:15:46 +04:00

Kconfig

kcore: add Kconfig help text

2013-11-13 12:09:33 +09:00

kcore.c

mm: use pgdat_end_pfn() to simplify the code in others

2013-11-13 12:09:03 +09:00

kmsg.c

kmsg: honor dmesg_restrict sysctl on /dev/kmsg

2013-06-12 16:29:44 -07:00

loadavg.c

sched, timers: cleanup avenrun users

2009-05-15 15:32:45 +02:00

Makefile

mm, vmalloc: move get_vmalloc_info() to vmalloc.c

2013-04-29 15:54:33 -07:00

meminfo.c

/proc/meminfo: provide estimated available memory

2014-01-21 16:19:43 -08:00

namespaces.c

consolidate simple ->d_delete() instances

2013-11-15 22:04:17 -05:00

nommu.c

seq_file: remove "%n" usage from seq_file users

2013-11-15 09:32:20 +09:00

page.c

fs/proc/page.c: add PageAnon check to surely detect thp

2014-01-23 16:36:50 -08:00

proc_devtree.c

of: remove HAVE_ARCH_DEVTREE_FIXUPS

2013-10-09 20:04:08 -05:00

proc_net.c

[readdir] convert procfs

2013-06-29 12:56:32 +04:00

proc_sysctl.c

Don't pass inode to ->d_hash() and ->d_compare()

2013-06-29 12:57:36 +04:00

proc_tty.c

proc: use seq_puts()/seq_putc() where possible

2011-01-13 08:03:16 -08:00

root.c

Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace

2013-09-07 14:35:32 -07:00

self.c

new helper: kfree_put_link()

2013-10-24 23:34:49 -04:00

softirqs.c

proc: use seq_puts()/seq_putc() where possible

2011-01-13 08:03:16 -08:00

stat.c

stat: Use size_t for sizes instead of unsigned

2013-02-01 12:32:08 +02:00

task_mmu.c

seq_file: remove "%n" usage from seq_file users

2013-11-15 09:32:20 +09:00

task_nommu.c

seq_file: remove "%n" usage from seq_file users

2013-11-15 09:32:20 +09:00

uptime.c

fs/proc/uptime.c:uptime_proc_show(): use get_monotonic_boottime()

2013-07-03 16:08:02 -07:00

version.c

proc: switch /proc/version to seq_file

2008-10-23 14:19:58 +04:00

vmcore.c

vmcore: enable /proc/vmcore mmap for s390

2013-09-11 15:59:14 -07:00