diff options
| author | Pekka Paalanen <pq@iki.fi> | 2008-05-12 21:20:57 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2008-05-24 11:21:48 +0200 |
| commit | 63ffa3e456c1a9884a3ebac997d91e3fdae18d78 (patch) | |
| tree | 7dd0c780c395e06e2bb5f47e5c35b9a00faf047e /include | |
| parent | fe1ffafa80f6673101c6560c2bacfe3df10372ee (diff) | |
x86 mmiotrace: comment about user space ABI
Signed-off-by: Pekka Paalanen <pq@iki.fi>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'include')
| -rw-r--r-- | include/linux/mmiotrace.h | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/include/linux/mmiotrace.h b/include/linux/mmiotrace.h index cb247825f3e..6ec288f1fe2 100644 --- a/include/linux/mmiotrace.h +++ b/include/linux/mmiotrace.h @@ -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 */ |