[PATCH 5.10 280/717] powerpc/64: Fix an EMIT_BUG_ENTRY in head_64.S

Greg Kroah-Hartman
2020-12-28T15:00:51Z

From: Jordan Niethe <jniethe5@gmail.com>

[ Upstream commit fe18a35e685c9bdabc8b11b3e19deb85a068b75d ]

Commit 63ce271b5e37 ("powerpc/prom: convert PROM_BUG() to standard
trap") added an EMIT_BUG_ENTRY for the trap after the branch to
start_kernel(). The EMIT_BUG_ENTRY was for the address "0b", however the
trap was not labeled with "0". Hence the address used for bug is in
relative_toc() where the previous "0" label is. Label the trap as "0" so
the correct address is used.

Fixes: 63ce271b5e37 ("powerpc/prom: convert PROM_BUG() to standard trap")
Signed-off-by: Jordan Niethe <jniethe5@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20201130004404.30953-1-jniethe5@gmail.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
arch/powerpc/kernel/head_64.S | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/kernel/head_64.S b/arch/powerpc/kernel/head_64.S
index 7b7c8c5ee6602..2d6581db0c7b6 100644
--- a/arch/powerpc/kernel/head_64.S
+++ b/arch/powerpc/kernel/head_64.S
@@ -990,7 +990,7 @@ start_here_common:
bl start_kernel

/* Not reached */
- trap
+0: trap
EMIT_BUG_ENTRY 0b, __FILE__, __LINE__, 0
.previous

--
2.27.0