From 7e5766fa9431602ef0e56ceae900d0cce3a78b96 Mon Sep 17 00:00:00 2001 From: "David S. Miller" Date: Mon, 29 Oct 2007 00:36:09 -0700 Subject: [PATCH] [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 --- arch/sparc64/mm/tsb.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/arch/sparc64/mm/tsb.c b/arch/sparc64/mm/tsb.c index 7ff0a02f58..a3e6e4b635 100644 --- a/arch/sparc64/mm/tsb.c +++ b/arch/sparc64/mm/tsb.c @@ -182,7 +182,9 @@ static void setup_tsb_params(struct mm_struct *mm, unsigned long tsb_idx, unsign 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); -- 2.39.5