linux-kernel - [PATCH v2 2/2] docs/core-api: memory-allocation: mention size helpers

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Message-Id: <20191022211438.3938-3-chris.packham@alliedtelesis.co.nz>
Date:   Wed, 23 Oct 2019 10:14:38 +1300
From:   Chris Packham <chris.packham@...iedtelesis.co.nz>
To:     corbet@....net
Cc:     linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        Chris Packham <chris.packham@...iedtelesis.co.nz>
Subject: [PATCH v2 2/2] docs/core-api: memory-allocation: mention size helpers

Mention struct_size(), array_size() and array3_size() in the same place
as kmalloc() and friends.

Signed-off-by: Chris Packham <chris.packham@...iedtelesis.co.nz>
---

Notes:
    Changes in v2:
    - Drop use of c:func:

 Documentation/core-api/memory-allocation.rst | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/Documentation/core-api/memory-allocation.rst b/Documentation/core-api/memory-allocation.rst
index 14e22accdee7..5c9dd70b0115 100644
--- a/Documentation/core-api/memory-allocation.rst
+++ b/Documentation/core-api/memory-allocation.rst
@@ -91,7 +91,8 @@ The most straightforward way to allocate memory is to use a function
 from the kmalloc() family. And, to be on the safe side it's best to use
 routines that set memory to zero, like kzalloc(). If you need to
 allocate memory for an array, there are kmalloc_array() and kcalloc()
-helpers.
+helpers. The helpers struct_size(), array_size() and array3_size() can
+be used to safely calculate object sizes without overflowing.
 
 The maximal size of a chunk that can be allocated with `kmalloc` is
 limited. The actual limit depends on the hardware and the kernel
-- 
2.23.0