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    SubjectRe: 2.2.12 Sparc SS-10 spin_lock...

    Hmmm, I'm just being paranoid but give this patch a try:

    --- include/asm-sparc/system.h.~1~ Fri Aug 13 05:39:46 1999
    +++ include/asm-sparc/system.h Tue Aug 31 05:45:27 1999
    @@ -116,6 +116,8 @@
    "rd %%wim, %%g5\n\t" \
    "wr %%g4, 0x20, %%psr\n\t" \
    "nop\n\t" \
    + "nop\n\t" \
    + "nop\n\t" \
    "std %%g4, [%%g6 + %3]\n\t" \
    "ldd [%2 + %3], %%g4\n\t" \
    "mov %2, %%g6\n\t" \
    @@ -125,11 +127,13 @@
    "wr %%g4, 0x20, %%psr\n\t" \
    "nop\n\t" \
    "nop\n\t" \
    + "nop\n\t" \
    "ldd [%%g6 + %4], %%sp\n\t" \
    "wr %%g5, 0x0, %%wim\n\t" \
    "ldd [%%sp + 0x00], %%l0\n\t" \
    "ldd [%%sp + 0x38], %%i6\n\t" \
    "wr %%g4, 0x0, %%psr\n\t" \
    + "nop\n\t" \
    "nop\n\t" \
    "nop\n\t" \
    "jmpl %%o7 + 0x8, %%g0\n\t" \
    -
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