Hello,
We in SCST project need to printk/sprintf variables of type uint64_t.
Size of those variables is required to be 64-bit integer. On x86 we
printk/sprintf them as %lld, but on Sparc we have a compiler warnings like:
scst/src/scst_targ.c:2136: warning: format ?%llx? expects type ?long
long unsigned int?, but argument 4 has type ?uint64_t?.
It is because on Sparc uint64_t defined as unsigned long, but on x86 -
as unsigned long long.
Sure, we can cast all the cases to unsigned long long, but we wonder,
maybe there is a more elegant way to do that without the warning? For
instance, like %z for size_t or PRId64 in the user space.
Thanks,
Vlad
On Wed, Jun 16, 2010 at 11:08:03PM +0400, Vladislav Bolkhovitin wrote:
> scst/src/scst_targ.c:2136: warning: format ?%llx? expects type ?long
> long unsigned int?, but argument 4 has type ?uint64_t?.
>
> It is because on Sparc uint64_t defined as unsigned long, but on x86 -
> as unsigned long long.
>
>From your other mail, it looks like you're using 2.6.26... this is
ancient! Sparc has since been fixed to use unsigned long long for u64.
commit 9018113649348c689da107166c05d436cd52e7bf
Author: Sam Ravnborg <[email protected]>
Date: Tue Jan 6 13:19:28 2009 -0800
sparc64: Use unsigned long long for u64.
regards, Kyle
From: Vladislav Bolkhovitin <[email protected]>
Date: Wed, 16 Jun 2010 23:08:03 +0400
> We in SCST project need to printk/sprintf variables of type
> uint64_t. Size of those variables is required to be 64-bit integer. On
> x86 we printk/sprintf them as %lld, but on Sparc we have a compiler
> warnings like:
>
> scst/src/scst_targ.c:2136: warning: format ?%llx? expects type ?long
> long unsigned int?, but argument 4 has type ?uint64_t?.
>
> It is because on Sparc uint64_t defined as unsigned long, but on x86 -
> as unsigned long long.
You must use %ll and explicitly cast the argument to "long long".
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