[PATCH] Documentation: Checkpatch.rst: Doc added UNNECESSARY_CAST
From: Vinesh Raut <hidden>
Date: 2021-08-05 10:51:39
Subsystem:
checkpatch documentation, documentation, documentation process, the rest · Maintainers:
Dwaipayan Ray, Lukas Bulwahn, Jonathan Corbet, Linus Torvalds
Documentation was missing for UNNECESSARY_CAST Warning. Added it to checkpatch.rst with refers from https://lore.kernel.org Also, pointers been mentioned in Documentation Suggested-by: Lukas Bulwahn <lukas.bulwahn@gmail.com> Signed-off-by: Vinesh Raut <redacted> --- Documentation/dev-tools/checkpatch.rst | 10 ++++++++++ 1 file changed, 10 insertions(+)
diff --git a/Documentation/dev-tools/checkpatch.rst b/Documentation/dev-tools/checkpatch.rst
index f0956e9ea2d8..72c2f32b1515 100644
--- a/Documentation/dev-tools/checkpatch.rst
+++ b/Documentation/dev-tools/checkpatch.rst@@ -268,6 +268,16 @@ Allocation style See: https://www.kernel.org/doc/html/latest/core-api/memory-allocation.html + **UNNECESSARY_CASTS** + Any alloc functions should not be cast. Because they usually returns the + void pointer, which compiler then implicitly picks the type of pointer at + run time. Hence, casting is not prefer on any alloc functions. cast may + hide bugs if any exist, as compiler supresses the warnings after casting. + + See: + http://c-faq.com/malloc/mallocnocast.html + https://lore.kernel.org/lkml/20070808024321.GA6316@redhat.com/ + https://lore.kernel.org/lkml/a5e60a2b93e10baf84af063f6c8e56402273105d.camel@perches.com/ API usage ---------
--
2.30.2
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