[Crash-utility] [PATCH] Fix typo for 'bf -FF' command

[Austin Kim]

When we use 'help bt' command, the instruction of 'bt' is printed as below.
crash> help bt

NAME
  bt - backtrace
...
    crash> bf -FF
    ...
     #4 [ffff810072b47f10] vfs_write at ffffffff800789d8
        ffff810072b47f18: [ffff81007e020380:files_cache] [ffff81007e2c2880:filp]
        ffff810072b47f28: 0000000000000002 fffffffffffffff7
        ffff810072b47f38: 00002b141825d000 sys_write+69
     #5 [ffff810072b47f40] sys_write at ffffffff80078f75

But it seems that 'bf -FF' shows misleading information
because invalid output is displayed using 'bf -FF' command as below.
crash>  bf -FF 1
crash: command not found: bf

But 'bt -FF 1' shows valid output.
crash> bt -FF 1
PID: 1      TASK: cf932d40  CPU: 0   COMMAND: "systemd"
 #0 [<c0c1609c>] (__schedule) from [<c0c162c0>]
    [PC: c0c1609c  LR: c0c162c0  SP: cf92fe18  SIZE: 72]
    cf92fe18: 40060093 _end+238341700 _end+239562316 trace_buffer_unlock_commit_regs+280
    cf92fe28: 001c754b schedule+132 schedule+124 00000004
    cf92fe38: 001c754b 00000000 __stack_chk_guard 00000000
    cf92fe48: 00000000 80060013 _end+239554564 00000000
    cf92fe58: _end+239562340 schedule+132
 #1 [<c0c162c0>] (schedule) from [<c0c1ab5c>]
    [PC: c0c162c0  LR: c0c1ab5c  SP: cf92fe60  SIZE: 8]
    cf92fe60: _end+239562452 schedule_hrtimeout_range_clock+300

So fix typo for 'bf -FF' command as below to avoid confusion.

Signed-off-by: Austin Kim <austindh.kim at gmail.com>
---
 help.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/help.c b/help.c
index 2b2285b..934d8bc 100644
--- a/help.c
+++ b/help.c
@@ -2133,7 +2133,7 @@ char *help_bt[] = {
 "        ffff810072b47f38: 00002b141825d000 sys_write+69   ",
 "     #5 [ffff810072b47f40] sys_write at ffffffff80078f75",
 "    ...",
-"    %s> bf -FF",
+"    %s> bt -FF",
 "    ...",
 "     #4 [ffff810072b47f10] vfs_write at ffffffff800789d8",
 "        ffff810072b47f18: [ffff81007e020380:files_cache] [ffff81007e2c2880:filp]",
-- 
2.6.2