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Message-Id: <1441645574-6043-1-git-send-email-ulfalizer.lkml@gmail.com> Date: Mon, 7 Sep 2015 19:06:14 +0200 From: ulfalizer.lkml@...il.com To: corbet@....net Cc: gregkh@...uxfoundation.org, shane.seymour@...com, ulfalizer@...il.com, linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH] sysfs.txt: mention that store method buffers are null-terminated From: Ulf Magnusson <ulfalizer@...il.com> Without knowing this, the use of sysfs_streq() becomes puzzling. The termination happens in kernfs_fop_write(). Signed-off-by: Ulf Magnusson <ulfalizer@...il.com> --- Documentation/filesystems/sysfs.txt | 3 +++ 1 file changed, 3 insertions(+) diff --git a/Documentation/filesystems/sysfs.txt b/Documentation/filesystems/sysfs.txt index 9494afb..575e997 100644 --- a/Documentation/filesystems/sysfs.txt +++ b/Documentation/filesystems/sysfs.txt @@ -198,6 +198,9 @@ implementations: entire file, modify the values it wishes to change, then write the entire buffer back. + A terminating null is added after the data on stores. This makes + functions like sysfs_streq() safe to use. + Attribute method implementations should operate on an identical buffer when reading and writing values. -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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