On Mon, Mar 02, 2026 at 08:25:56PM -0500, Theodore Tso wrote:

On Mon, Mar 02, 2026 at 03:23:45PM -0500, Jeff Layton wrote:

quoted

The PRIino macro is a length modifier, not a complete format specifier.
It is used as: "%" PRIino "u" for decimal, "%" PRIino "x" for hex, etc.
This follows the pattern used by userspace PRIu64/PRIx64 macros.

For the record, I really hate the inttypes.h format specifiers, but I
agree that we should forward the example of the C99 spec, for better
or for worse.

That being said, the userspace PRIu64, et. al macros are complete
format specifiers, not just a length modifier.  And I think this
results in less ugly format specifiers in our kernel code.

Yeah, I don't like "ino=%" PRIino "u, lolz\n" either.  I'd rather have
the whole format in the PRIino definition -- it /is/ unsigned long
after all.

--D

---- cut here ---
#!/bin/sh
cat <<EOF > /tmp/blah.c
#include <inttypes.h>
#include <stdio.h>

int main(int arg, char **argv)
{
        printf("PRIu64 is %s\n", PRIu64);
        printf("PRId64 is %s\n", PRId64);
        printf("PRIx64 is %s\n", PRIx64);
        return 0;
}
EOF

clang -m32 -o /tmp/blah /tmp/blah.c
/tmp/blah
---- cut here ---

% /tmp/blah.sh
PRIu64 is llu
PRId64 is lld
PRIx64 is llx

Thanks!

						- Ted