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maple_tree: remove undocumented CONFIG_MAPLE_RCU_DISABLED macro

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<linux/maple_tree.h> consults the macro CONFIG_MAPLE_RCU_DISABLED to
determine whether to disable the mt_in_rcu() function (by making it always
return false).  This macro is not reachable via Kconfig, despite its name,
and is not documented anywhere.  Remove it to avoid polluting the CONFIG_*
namespace.

Discovered while searching for CONFIG_* symbols referenced in code but not
defined in any Kconfig file.

Link: https://lore.kernel.org/20260610220905.99860-1-enelsonmoore@gmail.com
Signed-off-by: Ethan Nelson-Moore <enelsonmoore@gmail.com>
Acked-by: SeongJae Park <sj@kernel.org>
Reviewed-by: Liam Howlett <liam@infradead.org>
Reviewed-by: Alice Ryhl <aliceryhl@google.com>
Cc: Andrew Ballance <andrewjballance@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Ethan Nelson-Moore 2026-06-10 15:09:04 -07:00 committed by Andrew Morton
parent 644ad84870
commit 9b5e480980
1 changed files with 0 additions and 4 deletions
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4
include/linux/maple_tree.h
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@ -11,7 +11,6 @@
#include <linux/kernel.h>
#include <linux/rcupdate.h>
#include <linux/spinlock.h>
/* #define CONFIG_MAPLE_RCU_DISABLED */
/*
* Allocated nodes are mutable until they have been inserted into the tree,
@ -864,9 +863,6 @@ static inline void mt_init(struct maple_tree *mt)
static inline bool mt_in_rcu(struct maple_tree *mt)
{
#ifdef CONFIG_MAPLE_RCU_DISABLED
return false;
#endif
return mt->ma_flags & MT_FLAGS_USE_RCU;
}