Messages in this thread | | | Subject | Re: [PATCH] remove BKL from ext2's readdir | From | Andi Kleen <> | Date | Sat, 15 Mar 2003 22:55:11 +0100 |
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Andrew Morton <akpm@digeo.com> writes:
> foo_readdir() > { > loff_t pos = file->f_pos; > > .... > <code which doesn't touch file->f_pos, but which modifies pos> > ... > > file->f_pos = pos; > }
At least for alpha this will require an rmb_depends() between the read and the write. Probably on x86 an rmb() wouldn't hurt neither.
Otherwise there is no guarantee other CPUs see that intended memory modification order
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