Commit c011f80b authored by David S. Miller's avatar David S. Miller
Browse files

sparc64: Add some more commentary to __raw_local_irq_save() 



Suggested by Peter Zijlstra

Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 9343af08

arch/sparc/include/asm/irqflags_64.h

+7 −0
Original line number Diff line number Diff line
@@ -80,6 +80,13 @@ static inline unsigned long __raw_local_irq_save(void) 


	/* Disable interrupts to PIL_NORMAL_MAX unless we already

	 * are using PIL_NMI, in which case PIL_NMI is retained.

	 *

	 * The only values we ever program into the %pil are 0,

	 * PIL_NORMAL_MAX and PIL_NMI.

	 *

	 * Since PIL_NMI is the largest %pil value and all bits are

	 * set in it (0xf), it doesn't matter what PIL_NORMAL_MAX

	 * actually is.

	 */

	__asm__ __volatile__(

		"rdpr	%%pil, %0\n\t"