Re: [PATCH] Make u64 long long on all architectures (was: the printk problem)

On Tue, 2008-07-22 at 03:05 -0700, Andrew Morton wrote:

On Fri, 4 Jul 2008 20:03:51 -0600 Matthew Wilcox [off-list ref] wrote:

quoted

[PATCH] Make u64 long long on all architectures

It is currently awkward to print a u64 type.  Some architectures use
unsigned long while others use unsigned long long.  Since unsigned long
long is 64-bit for all existing Linux architectures, change those that
use long to use long long.  Note that this applies only within the
kernel.  If u64 is being used in a C++ method definition, the symbol
mangling would change.

Signed-off-by: Matthew Wilcox <redacted>

diff --git a/include/asm-generic/int-l64.h b/include/asm-generic/int-l64.h
index 2af9b75..32f07bd 100644
--- a/include/asm-generic/int-l64.h
+++ b/include/asm-generic/int-l64.h

@@ -23,8 +23,13 @@ typedef unsigned short __u16;
 typedef __signed__ int __s32;
 typedef unsigned int __u32;
 
+#ifdef __KERNEL__
+typedef __signed__ long long __s64;
+typedef unsigned long long __u64;
+#else
 typedef __signed__ long __s64;
 typedef unsigned long __u64;
+#endif
 
 #endif /* __ASSEMBLY__ */

This is (IMO) a desirable change and will prevent a heck of a lot of
goofing around, and will permit a lot of prior goofing around to
be removed.

But I bet there are lots of instalces of printk("%l", some_u64) down in
arch code where the type of u64 _is_ known which will now spew warnings.

Oh well.

As a rough estimate:

concordia powerpc(master) $ find arch/powerpc/ ! -name '*32.*' | xargs grep "%l" | grep -v "%ll" | wc -l
635


Someone's gonna get a lot of git points for fixing all those. Might keep
the speeling fix crowd busy for a while.

cheers

-- 
Michael Ellerman
OzLabs, IBM Australia Development Lab

wwweb: http://michael.ellerman.id.au
phone: +61 2 6212 1183 (tie line 70 21183)

We do not inherit the earth from our ancestors,
we borrow it from our children. - S.M.A.R.T Person