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13da9e200f
This reverts commitb3b77c8cae, which was also totally broken (see commit0d2daf5cc8that reverted the crc32 version of it). As reported by Stephen Rothwell, it causes problems on big-endian machines: > In file included from fs/jfs/jfs_types.h:33, > from fs/jfs/jfs_incore.h:26, > from fs/jfs/file.c:22: > fs/jfs/endian24.h:36:101: warning: "__LITTLE_ENDIAN" is not defined The kernel has never had that crazy "__BYTE_ORDER == __LITTLE_ENDIAN" model. It's not how we do things, and it isn't how we _should_ do things. So don't go there. Requested-by: Stephen Rothwell <sfr@canb.auug.org.au> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
36 lines
969 B
C
36 lines
969 B
C
#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/types.h>
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#include <asm/byteorder.h>
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#include <asm/fpu.h>
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#define add_ssaaaa(sh, sl, ah, al, bh, bl) \
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((sl) = (al) + (bl), (sh) = (ah) + (bh) + ((sl) < (al)))
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#define sub_ddmmss(sh, sl, ah, al, bh, bl) \
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((sl) = (al) - (bl), (sh) = (ah) - (bh) - ((al) < (bl)))
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#define umul_ppmm(wh, wl, u, v) \
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__asm__ ("mulq %2,%3,%1; umulh %2,%3,%0" \
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: "=r" ((UDItype)(wh)), \
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"=&r" ((UDItype)(wl)) \
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: "r" ((UDItype)(u)), \
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"r" ((UDItype)(v)))
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#define udiv_qrnnd(q, r, n1, n0, d) \
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do { unsigned long __r; \
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(q) = __udiv_qrnnd (&__r, (n1), (n0), (d)); \
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(r) = __r; \
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} while (0)
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extern unsigned long __udiv_qrnnd (unsigned long *, unsigned long,
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unsigned long , unsigned long);
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#define UDIV_NEEDS_NORMALIZATION 1
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#define abort() goto bad_insn
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#ifndef __LITTLE_ENDIAN
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#define __LITTLE_ENDIAN -1
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#endif
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#define __BYTE_ORDER __LITTLE_ENDIAN
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