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authorLinus Torvalds <torvalds@linux-foundation.org>2020-04-02 15:21:48 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2020-04-02 15:21:48 -0700
commitac438771ccb4479528594c7e19f2c39cf1814a86 (patch)
treed0579433dc73c12d188c40494040c45d85660dea
parent8c1b724ddb218f221612d4c649bc9c7819d8d7a6 (diff)
parentbfacd38f8d5b1f12b80aaacae2c15e1ffe11f06e (diff)
Merge branch 'for-5.7' of git://git.kernel.org/pub/scm/linux/kernel/git/dennis/percpu
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
-rw-r--r--include/linux/bitmap.h8
-rw-r--r--lib/percpu-refcount.c7
-rw-r--r--mm/percpu-stats.c2
-rw-r--r--mm/percpu.c2
4 files changed, 13 insertions, 6 deletions
diff --git a/include/linux/bitmap.h b/include/linux/bitmap.h
index e52ceb1a73d3..99058eb81042 100644
--- a/include/linux/bitmap.h
+++ b/include/linux/bitmap.h
@@ -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
diff --git a/lib/percpu-refcount.c b/lib/percpu-refcount.c
index 4f6c6ebbbbde..8d092609928e 100644
--- a/lib/percpu-refcount.c
+++ b/lib/percpu-refcount.c
@@ -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().
diff --git a/mm/percpu-stats.c b/mm/percpu-stats.c
index a5a8b22816ff..32558063c3f9 100644
--- a/mm/percpu-stats.c
+++ b/mm/percpu-stats.c
@@ -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.
*/
diff --git a/mm/percpu.c b/mm/percpu.c
index e9844086b236..d7e3bc649f4e 100644
--- a/mm/percpu.c
+++ b/mm/percpu.c
@@ -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