the R10000 needs an LL/SC Workaround. If not applied all R10k before
rev 3.0 misbehave on atomic ops and rev 2.6 and lower (e.g. SGI IP28)
die after very few seconds with a deadlock due to even more erratas.

---
 ports/sysdeps/mips/bits/atomic.h |   12 ++++++------
 1 file changed, 6 insertions(+), 6 deletions(-)

--- a/ports/sysdeps/mips/bits/atomic.h
+++ b/ports/sysdeps/mips/bits/atomic.h
@@ -74,7 +74,7 @@
      "bne	%0,%2,2f\n\t"						      \
      "move	%1,%3\n\t"						      \
      "sc	%1,%4\n\t"						      \
-     "beqz	%1,1b\n"						      \
+     "beqzl	%1,1b\n"						      \
      acq	"\n\t"							      \
      ".set	pop\n"							      \
      "2:\n\t"								      \
@@ -98,7 +98,7 @@
      "bne	%0,%2,2f\n\t"						      \
      "move	%1,%3\n\t"						      \
      "scd	%1,%4\n\t"						      \
-     "beqz	%1,1b\n"						      \
+     "beqzl	%1,1b\n"						      \
      acq	"\n\t"							      \
      ".set	pop\n"							      \
      "2:\n\t"								      \
@@ -192,7 +192,7 @@
      "ll	%0,%3\n\t"						      \
      "move	%1,%2\n\t"						      \
      "sc	%1,%3\n\t"						      \
-     "beqz	%1,1b\n"						      \
+     "beqzl	%1,1b\n"						      \
      acq	"\n\t"							      \
      ".set	pop\n"							      \
      "2:\n\t"								      \
@@ -216,7 +216,7 @@
      "lld	%0,%3\n\t"						      \
      "move	%1,%2\n\t"						      \
      "scd	%1,%3\n\t"						      \
-     "beqz	%1,1b\n"						      \
+     "beqzl	%1,1b\n"						      \
      acq	"\n\t"							      \
      ".set	pop\n"							      \
      "2:\n\t"								      \
@@ -251,7 +251,7 @@
      "ll	%0,%3\n\t"						      \
      "addu	%1,%0,%2\n\t"						      \
      "sc	%1,%3\n\t"						      \
-     "beqz	%1,1b\n"						      \
+     "beqzl	%1,1b\n"						      \
      acq	"\n\t"							      \
      ".set	pop\n"							      \
      "2:\n\t"								      \
@@ -275,7 +275,7 @@
      "lld	%0,%3\n\t"						      \
      "daddu	%1,%0,%2\n\t"						      \
      "scd	%1,%3\n\t"						      \
-     "beqz	%1,1b\n"						      \
+     "beqzl	%1,1b\n"						      \
      acq	"\n\t"							      \
      ".set	pop\n"							      \
      "2:\n\t"								      \