On Thu, Jun 24, 2004 at 15:15:12 -0500, Timur Tabi wrote: > If I compile my driver for the x86-64 platform, is "unsigned long" a > 32-bit or 64-bit quantity? You don't want to know that ;-). And since drivers in Linux are supposed to compile on all platforms (well, not all drivers, but most should), you shouldn't rely on sizes on particular platforms. On all platforms an unsigned long will hold a void *. For most other purposes, there are speicalized types, like off_t, size_t, ssize_t etc. There are also the s32/u32/s64/u64 types, that have those sizes on all platforms. That being said, looking at include/asm-x86_64/types.h shows, that you need long long to define s64, so long is likely to be 32 bits wide. ------------------------------------------------------------------------------- Jan 'Bulb' Hudec <bulb@ucw.cz>
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