From: Alexey Dobriyan <adobriyan@gmail.com>
To: linux-kernel@vger.kernel.org
Subject: How do I printk <type> correctly?
Date: Thu, 23 Oct 2008 15:41:33 +0400 [thread overview]
Message-ID: <20081023114133.GA30187@x200.localdomain> (raw)
If variable is of Type use printk format specifier.
---------------------------------------------------------
int %d or %x
unsigned int %u or %x
long %ld ot %lx
unsigned long %lu or %lx
long long %lld or %llx
unsigned long long %llu or %llx
size_t %zu or %zx
ssize_t %zd or %zx
Raw pointer value SHOULD be printed with %p.
u64 SHOULD be printed with %llu/%llx, (unsigned long long):
printk("%llu", (unsigned long long)u64_var);
s64 SHOULD be printed with %lld/%llx, (long long):
printk("%lld", (long long)s64_var);
If type is dependent on config option (sector_t), use format specifier
of biggest type and explicitly cast to it.
Reminder: sizeof() result is of type size_t.
Thank you for your cooperation.
next reply other threads:[~2008-10-23 11:38 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-23 11:41 Alexey Dobriyan [this message]
2008-10-23 11:51 ` David John
2008-10-23 12:06 ` Alexey Dobriyan
2008-10-23 15:13 ` Johannes Berg
2008-10-23 20:40 ` David Miller
2008-10-24 8:41 ` Johannes Berg
2008-10-28 23:11 ` Randy Dunlap
2008-10-29 6:15 ` Artem Bityutskiy
2008-10-29 8:00 ` Artem Bityutskiy
2008-10-29 15:34 ` Randy Dunlap
2008-10-29 15:36 ` Artem Bityutskiy
2008-10-29 15:43 ` Randy Dunlap
2008-11-05 18:23 ` Randy Dunlap
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