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printk,kdb: capture printk() when in kdb shell

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Certain calls from the kdb shell will call out to printk(), and any of
these calls should get vectored back to the kdb_printf() so that the
kdb pager and processing can be used, as well as to properly channel
I/O to the polled I/O devices.

CC: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Jason Wessel <jason.wessel@windriver.com>
Acked-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Jason Wessel 2010-05-20 21:04:27 -05:00
parent efe2f29e32
commit d37d39ae3b
5 changed files with 38 additions and 4 deletions
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4
kernel/debug/kdb/kdb_main.c
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@ -1056,7 +1056,9 @@ static void kdb_dumpregs(struct pt_regs *regs)
{
int old_lvl = console_loglevel;
console_loglevel = 15;
kdb_trap_printk++;
show_regs(regs);
kdb_trap_printk--;
kdb_printf("\n");
console_loglevel = old_lvl;
}
@ -1819,7 +1821,9 @@ static int kdb_sr(int argc, const char **argv)
if (argc != 1)
return KDB_ARGCOUNT;
sysrq_toggle_support(1);
kdb_trap_printk++;
handle_sysrq(*argv[1], NULL);
kdb_trap_printk--;
return 0;
}