milind@arun:~/src/linux> egrep -rin "#define.*NAME_?OFFSET" .
./arch/alpha/kernel/osf_sys.c:95:#define NAME_OFFSET offsetof (struct osf_dirent, d_name)
./arch/mips/kernel/sysirix.c:1738:#define NAME_OFFSET32(de) ((int) ((de)->d_name - (char *) (de)))
./arch/mips/kernel/sysirix.c:1840:#define NAME_OFFSET64(de) ((int) ((de)->d_name - (char *) (de)))
./arch/parisc/hpux/fs.c:72:#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
./arch/parisc/kernel/sys_parisc32.c:315:#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
./arch/powerpc/kernel/sys_ppc32.c:57:#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
./arch/sparc/kernel/sys_sunos.c:324:#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
./arch/sparc64/kernel/sys_sunos32.c:275:#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
./drivers/isdn/hardware/eicon/s_4bri.c:184:#define FPGA_NAME_OFFSET 0x10
./fs/compat.c:903:#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
./fs/readdir.c:54:#define NAME_OFFSET(de) ((int) ((de)->d_name - (char __user *) (de)))
./include/linux/fuse.h:342:#define FUSE_NAME_OFFSET ((unsigned) ((struct fuse_dirent *) 0)->name)
just working out different options before putting it in kernel.h
as all the dirent structures have used the
same name for the d_name member,so we can use
#define NAME_OFFSET(dirent) ((int) ((dirent)->d_name - (char __user *) (dirent)))
but then it becomes binding on the future users
to maintain the same naming convention.
#define NAME_OFFSET(dirent,d_name) ((int) ((dirent)->d_name - (char __user *) (dirent)))
#define NAME_OFFSET(dirent,d_name) offsetof(struct dirent,d_name)
though ..the first one seem to be just fine
thoughts
--
Milind Arun Choudhary
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