Messages in this thread |  | | Date | Thu, 23 Nov 2000 12:38:55 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: {PATCH} isofs stuff |
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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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