diff options
author | Pekka Paalanen <pq@iki.fi> | 2008-05-12 15:20:57 -0400 |
---|---|---|
committer | Thomas Gleixner <tglx@linutronix.de> | 2008-05-24 05:21:48 -0400 |
commit | 63ffa3e456c1a9884a3ebac997d91e3fdae18d78 (patch) | |
tree | 7dd0c780c395e06e2bb5f47e5c35b9a00faf047e | |
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>
-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 cb247825f3ec..6ec288f1fe24 100644 --- a/include/linux/mmiotrace.h +++ b/include/linux/mmiotrace.h | |||
@@ -3,6 +3,10 @@ | |||
3 | 3 | ||
4 | #include <asm/types.h> | 4 | #include <asm/types.h> |
5 | 5 | ||
6 | /* | ||
7 | * If you change anything here, you must bump MMIO_VERSION. | ||
8 | * This is the relay data format for user space. | ||
9 | */ | ||
6 | #define MMIO_VERSION 0x04 | 10 | #define MMIO_VERSION 0x04 |
7 | 11 | ||
8 | /* mm_io_header.type */ | 12 | /* mm_io_header.type */ |
@@ -23,7 +27,7 @@ enum mm_io_opcode { /* payload type: */ | |||
23 | }; | 27 | }; |
24 | 28 | ||
25 | struct mm_io_header { | 29 | struct mm_io_header { |
26 | __u32 type; | 30 | __u32 type; /* see MMIO_* macros above */ |
27 | __u32 sec; /* timestamp */ | 31 | __u32 sec; /* timestamp */ |
28 | __u32 nsec; | 32 | __u32 nsec; |
29 | __u32 pid; /* PID of the process, or 0 for kernel core */ | 33 | __u32 pid; /* PID of the process, or 0 for kernel core */ |