OrangePi_CM5/arch/frv/lib/atomic-lib.c


#include <linux/export.h>
#include <asm/atomic.h>

#define __ATOMIC_LIB__

#include <asm/atomic_defs.h>
frv: Rewrite atomic implementation Mostly complete rewrite of the FRV atomic implementation, instead of using assembly files, use inline assembler. The out-of-line CONFIG option makes a bit of a mess of things, but a little CPP trickery gets that done too. FRV already had the atomic logic ops but under a non standard name, the reimplementation provides the generic names and provides the intermediate form required for the bitops implementation. The slightly inconsistent __atomic32_fetch_##op naming is because __atomic_fetch_##op conlicts with GCC builtin functions. The 64bit atomic ops use the inline assembly %Ln construct to access the low word register (r+1), afaik this construct was not previously used in the kernel and is completely undocumented, but I found it in the FRV GCC code and it seems to work. FRV had a non-standard definition of atomic_{clear,set}_mask() which would work types other than atomic_t, the one user relying on that (arch/frv/kernel/dma.c) got converted to use the new intermediate form. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> 2015-04-24 06:49:20 +08:00
			`#include <linux/export.h>`
			`#include <asm/atomic.h>`

			`#define __ATOMIC_LIB__`

			`#include <asm/atomic_defs.h>`