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Commit 63ffa3e4 authored by Pekka Paalanen's avatar Pekka Paalanen Committed by Thomas Gleixner
Browse files

x86 mmiotrace: comment about user space ABI 



Signed-off-by: default avatarPekka Paalanen <pq@iki.fi>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
Signed-off-by: default avatarThomas Gleixner <tglx@linutronix.de>
parent fe1ffafa

include/linux/mmiotrace.h

+5 −1
Original line number Diff line number Diff line
@@ -3,6 +3,10 @@ 


#include <asm/types.h>



/*

 * If you change anything here, you must bump MMIO_VERSION.

 * This is the relay data format for user space.

 */

#define MMIO_VERSION 0x04



/* mm_io_header.type */
@@ -23,7 +27,7 @@ enum mm_io_opcode { /* payload type: */ 
};



struct mm_io_header {

	__u32 type;

	__u32 type;     /* see MMIO_* macros above */

	__u32 sec;      /* timestamp */

	__u32 nsec;

	__u32 pid;      /* PID of the process, or 0 for kernel core */