https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=240545
Bug ID: 240545
Summary: patch to remove unneeded M_WAITOK return value checks
Product: Base System
Version: 12.0-RELEASE
Hardware: Any
OS: Any
Status: New
Severity: Affects Only Me
Priority: ---
Component: kern
Assignee: b...@freebsd.org
Reporter: a...@watson.org
Created attachment 207432
--> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=207432&action=edit
remove NULL check and handling of it for M_WAITOK cases
Attached is a patch that removes the check of malloc(9)'s return value against
NULL when M_WAITOK flag is used. This does not cover all cases, but a number of
them that I found with an LLVM pass and partial compilation of kernel. That
pass also checks mallocarray(), realloc(), and reallocf(), but in the areas
analyzed did not see the extra code. I am not sure I like the idea of removing
NULL checks, but it is already handled. Are there any cases to be aware of for
why the check would be necessary with M_WAITOK? If no, I will try to go through
and look for others. The patch is for 12.0-RELEASE, but can adjust that as
well.
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