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Merge branch 'for-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu

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Pull percpu updates from Dennis Zhou:
 "This is just a few documentation fixes for percpu refcount and bitmap
  helpers that went in v5.6, and moving my emails to all be at korg"

* 'for-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu:
  percpu: update copyright emails to dennis@kernel.org
  include/bitmap.h: add new functions to documentation
  include/bitmap.h: add missing parameter in docs
  percpu_ref: Fix comment regarding percpu_ref_init flags
This commit is contained in:
Linus Torvalds 2020-04-02 15:21:48 -07:00
commit ac438771cc
4 changed files with 13 additions and 6 deletions
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8
include/linux/bitmap.h
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@ -50,7 +50,13 @@
* bitmap_set(dst, pos, nbits) Set specified bit area
* bitmap_clear(dst, pos, nbits) Clear specified bit area
* bitmap_find_next_zero_area(buf, len, pos, n, mask) Find bit free area
* bitmap_find_next_zero_area_off(buf, len, pos, n, mask) as above
* bitmap_find_next_zero_area_off(buf, len, pos, n, mask, mask_off) as above
* bitmap_next_clear_region(map, &start, &end, nbits) Find next clear region
* bitmap_next_set_region(map, &start, &end, nbits) Find next set region
* bitmap_for_each_clear_region(map, rs, re, start, end)
* Iterate over all clear regions
* bitmap_for_each_set_region(map, rs, re, start, end)
* Iterate over all set regions
* bitmap_shift_right(dst, src, n, nbits) *dst = *src >> n
* bitmap_shift_left(dst, src, n, nbits) *dst = *src << n
* bitmap_cut(dst, src, first, n, nbits) Cut n bits from first, copy rest

7
lib/percpu-refcount.c
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@ -50,9 +50,10 @@ static unsigned long __percpu *percpu_count_ptr(struct percpu_ref *ref)
* @flags: PERCPU_REF_INIT_* flags
* @gfp: allocation mask to use
*
* Initializes @ref. If @flags is zero, @ref starts in percpu mode with a
* refcount of 1; analagous to atomic_long_set(ref, 1). See the
* definitions of PERCPU_REF_INIT_* flags for flag behaviors.
* Initializes @ref. @ref starts out in percpu mode with a refcount of 1 unless
* @flags contains PERCPU_REF_INIT_ATOMIC or PERCPU_REF_INIT_DEAD. These flags
* change the start state to atomic with the latter setting the initial refcount
* to 0. See the definitions of PERCPU_REF_INIT_* flags for flag behaviors.
*
* Note that @release must not sleep - it may potentially be called from RCU
* callback context by percpu_ref_kill().

2
mm/percpu-stats.c
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@ -3,7 +3,7 @@
* mm/percpu-debug.c
*
* Copyright (C) 2017 Facebook Inc.
* Copyright (C) 2017 Dennis Zhou <dennisz@fb.com>
* Copyright (C) 2017 Dennis Zhou <dennis@kernel.org>
*
* Prints statistics about the percpu allocator and backing chunks.
*/

2
mm/percpu.c
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@ -6,7 +6,7 @@
* Copyright (C) 2009 Tejun Heo <tj@kernel.org>
*
* Copyright (C) 2017 Facebook Inc.
* Copyright (C) 2017 Dennis Zhou <dennisszhou@gmail.com>
* Copyright (C) 2017 Dennis Zhou <dennis@kernel.org>
*
* The percpu allocator handles both static and dynamic areas. Percpu
* areas are allocated in chunks which are divided into units. There is