[SPARC64]: Fix build failure when CONFIG_BUG is disabled.
When CONFIG_BUG is turned off, the standard trick of:
switch (x) {
case X:
...
case Y:
...
default:
BUG();
};
to mark impossible cases does not work because BUG() evalutes
to nothing and thus GCC just sees a fallthrough code path.
Add an explicit KERN_ERR log message and a do_exit() to trap
this case.
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc64/mm/tsb.c b/arch/sparc64/mm/tsb.c
index 7ff0a02..a3e6e4b 100644
--- a/arch/sparc64/mm/tsb.c
+++ b/arch/sparc64/mm/tsb.c
@@ -182,7 +182,9 @@
break;
default:
- BUG();
+ printk(KERN_ERR "TSB[%s:%d]: Impossible TSB size %lu, killing process.\n",
+ current->comm, current->pid, tsb_bytes);
+ do_exit(SIGSEGV);
};
tte |= pte_sz_bits(page_sz);