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btrfs: define the AUTO_KFREE/AUTO_KVFREE helper macros

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[ Upstream commit d00cbce0a7 ]

These are two simple macros which ensure that a pointer is initialized
to NULL and with the proper cleanup attribute for it.

Signed-off-by: Miquel Sabaté Solà <mssola@mssola.com>
Reviewed-by: David Sterba <dsterba@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Stable-dep-of: 52ee9965d0 ("btrfs: zoned: fixup last alloc pointer after extent removal for RAID0/10")
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Miquel Sabaté Solà
2025-10-24 12:21:41 +02:00
committed by Greg Kroah-Hartman
parent 531c755f25
commit acefb51f40
1 changed files with 7 additions and 0 deletions
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fs/btrfs/misc.h
+7
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@@ -10,6 +10,13 @@
#include <linux/math64.h>
#include <linux/rbtree.h>
/*
* Convenience macros to define a pointer with the __free(kfree) and
* __free(kvfree) cleanup attributes and initialized to NULL.
*/
#define AUTO_KFREE(name) *name __free(kfree) = NULL
#define AUTO_KVFREE(name) *name __free(kvfree) = NULL
/*
* Enumerate bits using enum autoincrement. Define the @name as the n-th bit.
*/