Commit 8529091e authored by Josh Triplett's avatar Josh Triplett Committed by Linus Torvalds
Browse files

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: default avatarJosh Triplett <josh@joshtriplett.org>
Reported-by: default avatarEd Cashin <ecashin@coraid.com>
Tested-by: default avatarEd Cashin <ecashin@coraid.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent a5ba911e

include/linux/compiler.h

+2 −0
Original line number Diff line number Diff line
@@ -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 void __iomem *); 
# 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

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