powerpc/8xx: Fix warning in hw_breakpoint_handler()

In hw_breakpoint_handler(), ea is set by wp_get_instr_detail() except
for 8xx, leading the variable to be passed uninitialised to
wp_check_constraints().  This is safe as wp_check_constraints() returns
early without using ea, so just set it to make the compiler happy.

Signed-off-by: Russell Currey <ruscur@russell.cc>
Reviewed-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20221024041346.103608-1-ruscur@russell.cc

diff --git a/arch/powerpc/kernel/hw_breakpoint.c b/arch/powerpc/kernel/hw_breakpoint.c
index 8db1a15d7acbe17815f2a843242b5ea5339fbcf1..e1b4e70c8fd0f0abadc2ad26536a906ca2a44e94 100644 (file)
--- a/arch/powerpc/kernel/hw_breakpoint.c
+++ b/arch/powerpc/kernel/hw_breakpoint.c
@@ -646,7 +646,7 @@ int hw_breakpoint_handler(struct die_args *args)
        ppc_inst_t instr = ppc_inst(0);
        int type = 0;
        int size = 0;
-       unsigned long ea;
+       unsigned long ea = 0;
 
        /* Disable breakpoints during exception handling */
        hw_breakpoint_disable();