The patch titled
Subject: linux/compiler.h: add __must_hold macro for functions called with a lock held
has been added to the -mm tree. Its filename is
linux-compilerh-add-__must_hold-macro-for-functions-called-with-a-lock-held.patch
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------------------------------------------------------
From: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
Subject: linux/compiler.h: add __must_hold macro for functions called with a lock held
linux/compiler.h has macros to denote functions that acquire or release
locks, but not to denote functions called with a lock held that return
with the lock still held. Add a __must_hold macro to cover that case.
Signed-off-by: Josh Triplett <josh@xxxxxxxxxxxxxxxx>
Reported-by: Ed Cashin <ecashin@xxxxxxxxxx>
Tested-by: Ed Cashin <ecashin@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
include/linux/compiler.h | 2 ++
1 file changed, 2 insertions(+)
diff -puN include/linux/compiler.h~linux-compilerh-add-__must_hold-macro-for-functions-called-with-a-lock-held include/linux/compiler.h
--- a/include/linux/compiler.h~linux-compilerh-add-__must_hold-macro-for-functions-called-with-a-lock-held
+++ a/include/linux/compiler.h
@@ -10,6 +10,7 @@
# define __force __attribute__((force))
# define __nocast __attribute__((nocast))
# define __iomem __attribute__((noderef, address_space(2)))
+# define __must_hold(x) __attribute__((context(x,1,1)))
# define __acquires(x) __attribute__((context(x,0,1)))
# define __releases(x) __attribute__((context(x,1,0)))
# define __acquire(x) __context__(x,1)
@@ -33,6 +34,7 @@ extern void __chk_io_ptr(const volatile
# define __chk_user_ptr(x) (void)0
# define __chk_io_ptr(x) (void)0
# define __builtin_warning(x, y...) (1)
+# define __must_hold(x)
# define __acquires(x)
# define __releases(x)
# define __acquire(x) (void)0
_
Patches currently in -mm which might be from josh@xxxxxxxxxxxxxxxx are
origin.patch
linux-next.patch
linux-compilerh-add-__must_hold-macro-for-functions-called-with-a-lock-held.patch
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