[LU-1537] posix-types.h redefines __s64 and __u64 in an incompatible way on powerpc

• Type: Bug
• Resolution: Fixed
• Priority: Minor
• Fix Version/s: Lustre 2.4.0
• Severity: 3
• Assignee: Oleg Drokin
• Reporter: Prakash Surya (Inactive)

Description

The linux kernel defines 64bit user space values as l64 on powerpc machines. Unfortunately this is incompatible with the way Lustre assumes 64bit values are ll64 in user space.

The relevant code from the kernel headers (arch/powerpc/include/asm/types.h):

#if defined(__powerpc64__) && !defined(__KERNEL__)
# include <asm-generic/int-l64.h>
#else
# include <asm-generic/int-ll64.h>
#endif

The relevant code from the Lustre headers (libcfs/include/libcfs/posix/posix-types.h):

#ifndef HAVE___S64
typedef __signed__ long long __s64;
#endif
#ifndef HAVE___U64
typedef unsigned long long __u64;
#endif

This incompatibility is causing the following program to fail compilation:

$ cat main.c 
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <lustre/liblustreapi.h>
#include <lustre/lustre_user.h>

int
main ( )
{
 (void) llapi_file_open("filename",O_CREAT|O_WRONLY,0666,1048576ll,-1,10,0);
}

$ make main
cc     main.c   -o main
In file included from /usr/include/lustre/lustre_user.h:50,
                 from /usr/include/lustre/liblustreapi.h:48,
                 from main.c:6:
/usr/include/libcfs/posix/posix-types.h:79: error: conflicting types for '__s64'
/usr/include/asm-generic/int-l64.h:28: note: previous declaration of '__s64' was here
/usr/include/libcfs/posix/posix-types.h:82: error: conflicting types for '__u64'
/usr/include/asm-generic/int-l64.h:29: note: previous declaration of '__u64' was here
make: *** [main] Error 1