proc: export statistics for softirq to /proc

Export statistics for softirq in /proc/softirqs and /proc/stat.

1. /proc/softirqs
Implement /proc/softirqs which shows the number of softirq
for each CPU like /proc/interrupts.

2. /proc/stat
Add the "softirq" line to /proc/stat.
This line shows the number of softirq for all cpu.
The first column is the total of all softirqs and
each subsequent column is the total for particular softirq.

[[email protected]: remove redundant for_each_possible_cpu() loop]
Signed-off-by: Keika Kobayashi <[email protected]>
Reviewed-by: Hiroshi Shimamoto <[email protected]>
Cc: KOSAKI Motohiro <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Eric Dumazet <[email protected]>
Cc: Alexey Dobriyan <[email protected]>
Signed-off-by: KOSAKI Motohiro <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

0 files changed, 0 insertions, 0 deletions