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authorAndrew Morton <akpm@osdl.org>2006-03-25 03:07:15 -0800
committerLinus Torvalds <torvalds@g5.osdl.org>2006-03-25 08:22:53 -0800
commitc1cda48af8b330a23206eceef3bd030b53c979cd (patch)
treee39240fd743e22804d29ab0f38d5a0d5e64457b7 /init
parent[PATCH] reiserfs: cleanups (diff)
downloadlinux-dev-c1cda48af8b330a23206eceef3bd030b53c979cd.tar.xz
linux-dev-c1cda48af8b330a23206eceef3bd030b53c979cd.zip
[PATCH] initcall failure reporting
We presently ignore the return values from initcalls. But that can carry useful debugging information. So print it out if it's non-zero. It turns out the -ENODEV happens quite a lot, due to built-in drivers which have no hardware to drive. So suppress that unless initcall_debug was specified. Also make the warning message more friendly by printing the name of the initcall function. Also drop the KERN_DEBUG from the initcall_debug message. If we specified inticall_debug then we obviously want to see the messages. Acked-by: Paul Jackson <pj@sgi.com> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'init')
-rw-r--r--init/main.c22
1 files changed, 15 insertions, 7 deletions
diff --git a/init/main.c b/init/main.c
index 2714e0e7cfec..a596cb8ac982 100644
--- a/init/main.c
+++ b/init/main.c
@@ -571,17 +571,23 @@ static void __init do_initcalls(void)
int count = preempt_count();
for (call = __initcall_start; call < __initcall_end; call++) {
- char *msg;
+ char *msg = NULL;
+ char msgbuf[40];
+ int result;
if (initcall_debug) {
- printk(KERN_DEBUG "Calling initcall 0x%p", *call);
- print_fn_descriptor_symbol(": %s()", (unsigned long) *call);
+ printk("Calling initcall 0x%p", *call);
+ print_fn_descriptor_symbol(": %s()",
+ (unsigned long) *call);
printk("\n");
}
- (*call)();
+ result = (*call)();
- msg = NULL;
+ if (result && (result != -ENODEV || initcall_debug)) {
+ sprintf(msgbuf, "error code %d", result);
+ msg = msgbuf;
+ }
if (preempt_count() != count) {
msg = "preemption imbalance";
preempt_count() = count;
@@ -591,8 +597,10 @@ static void __init do_initcalls(void)
local_irq_enable();
}
if (msg) {
- printk(KERN_WARNING "error in initcall at 0x%p: "
- "returned with %s\n", *call, msg);
+ printk(KERN_WARNING "initcall at 0x%p", *call);
+ print_fn_descriptor_symbol(": %s()",
+ (unsigned long) *call);
+ printk(": returned with %s\n", msg);
}
}