[SPARC64]: Fix ptrace/strace
Don't clobber register %l0 while checking TI_SYS_NOERROR value in syscall return path. This bug was introduced by: db7d9a4e Problem narrowed down by Luis F. Ortiz and Richard Mortimer. I tried using %l2 as suggested by Luis and that works for me. Looking at the code I wonder if it makes sense to simplify the code a little bit. The following works for me but I'm not sure how to exercise the "NOERROR" codepath. Signed-off-by: David S. Miller <davem@davemloft.net>
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