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authorStephen Boyd <swboyd@chromium.org>2020-10-16 06:11:17 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2020-10-16 21:11:20 +0300
commit3b6742618ed9216dd6caad968fe8c83b32dff485 (patch)
tree78f75dd82a79997a931caa7fd7dc0a9031377f45 /include
parent8d8472cfdefa0f5c839f5c4a507af5e26ee6f5bf (diff)
downloadlinux-3b6742618ed9216dd6caad968fe8c83b32dff485.tar.xz
lib/idr.c: document calling context for IDA APIs mustn't use locks
The documentation for these functions indicates that callers don't need to hold a lock while calling them, but that documentation is only in one place under "IDA Usage". Let's state the same information on each IDA function so that it's clear what the calling context requires. Furthermore, let's document ida_simple_get() with the same information so that callers know how this API works. Signed-off-by: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Tri Vo <trong@android.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Matthew Wilcox <willy@infradead.org> Link: https://lkml.kernel.org/r/20200910055246.2297797-1-swboyd@chromium.org Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include')
-rw-r--r--include/linux/idr.h9
1 files changed, 6 insertions, 3 deletions
diff --git a/include/linux/idr.h b/include/linux/idr.h
index 3ade03e5c7af..b235ed987021 100644
--- a/include/linux/idr.h
+++ b/include/linux/idr.h
@@ -263,7 +263,8 @@ void ida_destroy(struct ida *ida);
*
* Allocate an ID between 0 and %INT_MAX, inclusive.
*
- * Context: Any context.
+ * Context: Any context. It is safe to call this function without
+ * locking in your code.
* Return: The allocated ID, or %-ENOMEM if memory could not be allocated,
* or %-ENOSPC if there are no free IDs.
*/
@@ -280,7 +281,8 @@ static inline int ida_alloc(struct ida *ida, gfp_t gfp)
*
* Allocate an ID between @min and %INT_MAX, inclusive.
*
- * Context: Any context.
+ * Context: Any context. It is safe to call this function without
+ * locking in your code.
* Return: The allocated ID, or %-ENOMEM if memory could not be allocated,
* or %-ENOSPC if there are no free IDs.
*/
@@ -297,7 +299,8 @@ static inline int ida_alloc_min(struct ida *ida, unsigned int min, gfp_t gfp)
*
* Allocate an ID between 0 and @max, inclusive.
*
- * Context: Any context.
+ * Context: Any context. It is safe to call this function without
+ * locking in your code.
* Return: The allocated ID, or %-ENOMEM if memory could not be allocated,
* or %-ENOSPC if there are no free IDs.
*/