[PATCH] Documentation: add print bitmap description

[PATCH] Documentation: add print bitmap description

[Wang Long]

as the commit: "lib/vsprintf: implement bitmap printing through
'%*pb[l]'" add an easy way to print bitmaps. so printk-formats.txt
should reflect it.

Signed-off-by: Wang Long <long.wanglong@huawei.com>
---
 Documentation/printk-formats.txt | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/Documentation/printk-formats.txt b/Documentation/printk-formats.txt
index 5a615c1..255a061 100644
--- a/Documentation/printk-formats.txt
+++ b/Documentation/printk-formats.txt
@@ -239,6 +239,15 @@ s64 SHOULD be printed with %lld/%llx:
 
 	printk("%lld", s64_var);
 
+bitmap and its derivatives such as cpumask and nodemask:
+
+	%*pb	0779
+	%*pbl	0,3-6,8-10
+
+	For printing bitmap and its derivatives such as cpumask and nodemask,
+	%*pb output the bitmap with field width as the number of bits and %*pbl
+	output the bitmap as range list with field width as the number of bits.
+
 If <type> is dependent on a config option for its size (e.g., sector_t,
 blkcnt_t) or is architecture-dependent for its size (e.g., tcflag_t), use a
 format specifier of its largest possible type and explicitly cast to it.
-- 
1.8.3.4

Re: [PATCH] Documentation: add print bitmap description

[Tejun Heo]

On Thu, Feb 26, 2015 at 03:28:25AM +0000, Wang Long wrote:
> as the commit: "lib/vsprintf: implement bitmap printing through
> '%*pb[l]'" add an easy way to print bitmaps. so printk-formats.txt
> should reflect it.
> 
> Signed-off-by: Wang Long <long.wanglong@huawei.com>

Acked-by: Tejun Heo <tj@kernel.org>

Oops, sorry about missing that.

Thanks.

-- 
tejun

Re: [PATCH] Documentation: add print bitmap description

[Jonathan Corbet]

On Thu, 26 Feb 2015 03:28:25 +0000
Wang Long <long.wanglong@huawei.com> wrote:

> as the commit: "lib/vsprintf: implement bitmap printing through
> '%*pb[l]'" add an easy way to print bitmaps. so printk-formats.txt
> should reflect it.

Applied to the docs tree.

Thanks,

jon