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locking: Introduce __cleanup() based infrastructure

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Use __attribute__((__cleanup__(func))) to build:

 - simple auto-release pointers using __free()

 - 'classes' with constructor and destructor semantics for
   scope-based resource management.

 - lock guards based on the above classes.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20230612093537.614161713%40infradead.org
This commit is contained in:
Peter Zijlstra
2023-05-26 12:23:48 +02:00
parent 9a1f37ebcf
commit 54da6a0924
16 changed files with 272 additions and 1 deletions
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2
scripts/checkpatch.pl
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@@ -5046,7 +5046,7 @@ sub process {
if|for|while|switch|return|case|
volatile|__volatile__|
__attribute__|format|__extension__|
asm|__asm__)$/x)
asm|__asm__|scoped_guard)$/x)
{
# cpp #define statements have non-optional spaces, ie
# if there is a space between the name and the open