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Subject[PATCH v4 1/4] kdb: Re-factor kdb_printf() message write code
Date
Re-factor kdb_printf() message write code in order to avoid duplication
of code and thereby increase readability.

Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
---
kernel/debug/kdb/kdb_io.c | 61 +++++++++++++++++++++++++----------------------
1 file changed, 32 insertions(+), 29 deletions(-)

diff --git a/kernel/debug/kdb/kdb_io.c b/kernel/debug/kdb/kdb_io.c
index 924bc92..e46f33e 100644
--- a/kernel/debug/kdb/kdb_io.c
+++ b/kernel/debug/kdb/kdb_io.c
@@ -542,6 +542,33 @@ static int kdb_search_string(char *searched, char *searchfor)
return 0;
}

+static void kdb_io_write(char *cp, int len)
+{
+ if (len == 0)
+ return;
+
+ while (len--) {
+ dbg_io_ops->write_char(*cp);
+ cp++;
+ }
+}
+
+static void kdb_msg_write(char *msg, int msg_len)
+{
+ struct console *c;
+
+ if (msg_len == 0)
+ return;
+
+ if (dbg_io_ops && !dbg_io_ops->is_console)
+ kdb_io_write(msg, msg_len);
+
+ for_each_console(c) {
+ c->write(c, msg, msg_len);
+ touch_nmi_watchdog();
+ }
+}
+
int vkdb_printf(enum kdb_msgsrc src, const char *fmt, va_list ap)
{
int diag;
@@ -553,7 +580,6 @@ int vkdb_printf(enum kdb_msgsrc src, const char *fmt, va_list ap)
int this_cpu, old_cpu;
char *cp, *cp2, *cphold = NULL, replaced_byte = ' ';
char *moreprompt = "more> ";
- struct console *c;
unsigned long uninitialized_var(flags);

/* Serialize kdb_printf if multiple cpus try to write at once.
@@ -687,22 +713,11 @@ int vkdb_printf(enum kdb_msgsrc src, const char *fmt, va_list ap)
*/
retlen = strlen(kdb_buffer);
cp = (char *) printk_skip_headers(kdb_buffer);
- if (!dbg_kdb_mode && kgdb_connected) {
+ if (!dbg_kdb_mode && kgdb_connected)
gdbstub_msg_write(cp, retlen - (cp - kdb_buffer));
- } else {
- if (dbg_io_ops && !dbg_io_ops->is_console) {
- len = retlen - (cp - kdb_buffer);
- cp2 = cp;
- while (len--) {
- dbg_io_ops->write_char(*cp2);
- cp2++;
- }
- }
- for_each_console(c) {
- c->write(c, cp, retlen - (cp - kdb_buffer));
- touch_nmi_watchdog();
- }
- }
+ else
+ kdb_msg_write(cp, retlen - (cp - kdb_buffer));
+
if (logging) {
saved_loglevel = console_loglevel;
console_loglevel = CONSOLE_LOGLEVEL_SILENT;
@@ -751,19 +766,7 @@ int vkdb_printf(enum kdb_msgsrc src, const char *fmt, va_list ap)
moreprompt = "more> ";

kdb_input_flush();
-
- if (dbg_io_ops && !dbg_io_ops->is_console) {
- len = strlen(moreprompt);
- cp = moreprompt;
- while (len--) {
- dbg_io_ops->write_char(*cp);
- cp++;
- }
- }
- for_each_console(c) {
- c->write(c, moreprompt, strlen(moreprompt));
- touch_nmi_watchdog();
- }
+ kdb_msg_write(moreprompt, strlen(moreprompt));

if (logging)
printk("%s", moreprompt);
--
2.7.4
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