On Thu, 23 Nov 2000, Andi Kleen wrote:
>
> I am actually not sure if the normal kernel contains even a variable
> width long long shift.
Sure it does. The isofs code contains exctly that:
block = filp->f_pos >> bufbits;
In fact, almost all filesystems do this at some point. ext2 does it for
directories too, for some very similar reasons that isofs does. See
fs/ext2/dir.c:
blk = (filp->f_pos) >> EXT2_BLOCK_SIZE_BITS(sb);
(and don't ask me about the extraneous parenthesis. I bet some LISP
programmer felt alone and decided to make it a bit more homey).
Linus
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This archive was generated by hypermail 2b29 : Thu Nov 23 2000 - 21:00:26 EST