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From: Joe Perches <>
To: Linus Torvalds <>
Cc: LKML <>
Subject: RFC: Allow kfree to free all types of allocations ?
Date: Tue, 09 Jun 2020 15:50:42 -0700
Message-ID: <> (raw)

There are a lot of patches trying to match
various [kv].alloc allocations to specific frees.

But are there frees in a fast path?

Why not convert kfree to add a few extra tests
and add #defines for existing uses

Something like:

void kfree(const void *addr)
	if (is_kernel_rodata((unsigned long)addr))

	if (is_vmalloc_addr(addr))

And add defines like:

#define kvfree		kfree
#define vfree		kfree
#define kfree_const	kfree

Does 4 extra tests really matter?

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