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Add a WARN() macro; this is WARN_ON() + printk arguments

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Add a WARN() macro that acts like WARN_ON(), with the added feature that it
takes a printk like argument that is printed as part of the warning message.

[akpm@linux-foundation.org: fix printk arguments]
[akpm@linux-foundation.org: coding-style fixes]
Signed-off-by: Arjan van de Ven <arjan@linux.intel.com>
Cc: Greg KH <greg@kroah.com>
Cc: Jiri Slaby <jirislaby@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Arjan van de Ven 2008-07-25 01:45:53 -07:00 • committed by Linus Torvalds
parent b6c6393700
commit a8f18b909c
2 changed files with 44 additions and 0 deletions
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22
kernel/panic.c
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@ -318,6 +318,28 @@ void warn_on_slowpath(const char *file, int line)
add_taint(TAINT_WARN);
}
EXPORT_SYMBOL(warn_on_slowpath);
void warn_slowpath(const char *file, int line, const char *fmt, ...)
{
va_list args;
char function[KSYM_SYMBOL_LEN];
unsigned long caller = (unsigned long)__builtin_return_address(0);
sprint_symbol(function, caller);
printk(KERN_WARNING "------------[ cut here ]------------\n");
printk(KERN_WARNING "WARNING: at %s:%d %s()\n", file,
line, function);
va_start(args, fmt);
vprintk(fmt, args);
va_end(args);
print_modules();
dump_stack();
print_oops_end_marker();
add_taint(TAINT_WARN);
}
EXPORT_SYMBOL(warn_slowpath);
#endif
#ifdef CONFIG_CC_STACKPROTECTOR