[POWERPC] Fix manual assembly WARN_ON() in enter_rtas().

When we switched over to the generic BUG mechanism we forgot to change
the assembly code which open-codes a WARN_ON() in enter_rtas(), so the
bug table got corrupted.

This patch provides an EMIT_BUG_ENTRY macro for use in assembly code,
and uses it in entry_64.S. Tested with CONFIG_DEBUG_BUGVERBOSE on ppc64
but not without -- I tried to turn it off but it wouldn't go away; I
suspect Aunt Tillie probably needed it.

This version gets __FILE__ and __LINE__ right in the assembly version --
rather than saying include/asm-powerpc/bug.h line 21 every time which is
a little suboptimal.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>

1 files changed, 3 insertions, 0 deletions

diff --git a/arch/powerpc/kernel/asm-offsets.c b/arch/powerpc/kernel/asm-offsets.c
index e96521530d21..030d300cd71c 100644
--- a/arch/powerpc/kernel/asm-offsets.c
+++ b/arch/powerpc/kernel/asm-offsets.c
@@ -303,5 +303,8 @@ int main(void)
         DEFINE(NSEC_PER_SEC, NSEC_PER_SEC);
         DEFINE(CLOCK_REALTIME_RES, TICK_NSEC);
 
+#ifdef CONFIG_BUG
+        DEFINE(BUG_ENTRY_SIZE, sizeof(struct bug_entry));
+#endif
         return 0;
 }