linux-kernel - [PATCH v2 4/5] mm/slab: Add _

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Date:   Mon, 14 Aug 2023 00:43:32 -0700
From:   Dan Williams <dan.j.williams@...el.com>
To:     linux-coco@...ts.linux.dev
Cc:     Andrew Morton <akpm@...ux-foundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 4/5] mm/slab: Add __free() support for kvfree

Allow for the declaration of variables that trigger kvfree() when they
go out of scope.

Cc: Andrew Morton <akpm@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
---
 include/linux/slab.h |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/linux/slab.h b/include/linux/slab.h
index 848c7c82ad5a..241025367943 100644
--- a/include/linux/slab.h
+++ b/include/linux/slab.h
@@ -746,6 +746,8 @@ static inline __alloc_size(1, 2) void *kvcalloc(size_t n, size_t size, gfp_t fla
 extern void *kvrealloc(const void *p, size_t oldsize, size_t newsize, gfp_t flags)
 		      __realloc_size(3);
 extern void kvfree(const void *addr);
+DEFINE_FREE(kvfree, void *, if (_T) kvfree(_T))
+
 extern void kvfree_sensitive(const void *addr, size_t len);
 
 unsigned int kmem_cache_size(struct kmem_cache *s);