Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit c2a4c406 authored by Catalin Marinas's avatar Catalin Marinas Committed by Russell King
Browse files

[ARM] 3533/1: Implement the __raw_(read|write)_can_lock functions on ARM 



Patch from Catalin Marinas

Recent patches introduced the write_can_lock() call in the kernel/ptrace.c
file. Implement the __raw_* variants on ARM (SMP) as well.

Signed-off-by: default avatarCatalin Marinas <catalin.marinas@arm.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent ec64152f

include/asm-arm/spinlock.h

+6 −0
Original line number Diff line number Diff line
@@ -142,6 +142,9 @@ static inline void __raw_write_unlock(raw_rwlock_t *rw) 
	: "cc");

}



/* write_can_lock - would write_trylock() succeed? */

#define __raw_write_can_lock(x)		((x)->lock == 0x80000000)



/*

 * Read locks are a bit more hairy:

 *  - Exclusively load the lock value.
@@ -198,4 +201,7 @@ static inline void __raw_read_unlock(raw_rwlock_t *rw) 


#define __raw_read_trylock(lock) generic__raw_read_trylock(lock)



/* read_can_lock - would read_trylock() succeed? */

#define __raw_read_can_lock(x)		((x)->lock < 0x80000000)



#endif /* __ASM_SPINLOCK_H */