Re: [PATCH] filldir write data missing size

From: OGAWA Hirofumi
Date: Sat Jul 19 2008 - 16:11:48 EST

Yoshinori Sato <ysato@xxxxxxxxxxxxxxxxxxxx> writes:

>> > - if (__put_user(offset, &dirent->d_off))
>> > + if (__put_user((unsigned long)offset, &dirent->d_off))
>> Um.. __put_user() should be already doing it automatically..
> I'm mistake.
> I checked object, and found bad code.
> This problem fix __put_user.

Um.. Could you explain the detail of problem? Is this a workaround or
something for the bug of some compiler? If so, shouldn't we fix
__put_user() instead of caller?

E.g. the following or something fixes it? (btw, this is for x86)

#define __put_user(x, ptr) ({ \
/* Since some compiler generates wrong code, we need __v.?? */ \
__typeof__(*(ptr)) __v = (x); \
__put_user_nocheck(__v, (ptr), sizeof(*(ptr))); \
OGAWA Hirofumi <hirofumi@xxxxxxxxxxxxxxxxxx>
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at