[PATCH 5/5] powerpc: Use the TRAP macro whenever comparing a trap number

[Benjamin Herrenschmidt]

Trap numbers can have extra bits at the bottom that need to
be filtered out. There are a few cases where we don't do that.

It's possible that we got lucky but better safe than sorry.

Signed-off-by: Benjamin Herrenschmidt <b...@kernel.crashing.org>
---
 arch/powerpc/kernel/process.c | 2 +-
 arch/powerpc/kernel/traps.c   | 2 +-
 arch/powerpc/mm/fault.c       | 2 +-
 3 files changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/kernel/process.c b/arch/powerpc/kernel/process.c
index 72be0c32e902..397d6e64e3df 100644
--- a/arch/powerpc/kernel/process.c
+++ b/arch/powerpc/kernel/process.c
@@ -1409,7 +1409,7 @@ void show_regs(struct pt_regs * regs)
        print_msr_bits(regs->msr);
        pr_cont("  CR: %08lx  XER: %08lx\n", regs->ccr, regs->xer);
        trap = TRAP(regs);
-       if ((regs->trap != 0xc00) && cpu_has_feature(CPU_FTR_CFAR))
+       if ((TRAP(regs) != 0xc00) && cpu_has_feature(CPU_FTR_CFAR))
                pr_cont("CFAR: "REG" ", regs->orig_gpr3);
        if (trap == 0x200 || trap == 0x300 || trap == 0x600)
 #if defined(CONFIG_4xx) || defined(CONFIG_BOOKE)
diff --git a/arch/powerpc/kernel/traps.c b/arch/powerpc/kernel/traps.c
index f3eb61be0d30..d61989be28e1 100644
--- a/arch/powerpc/kernel/traps.c
+++ b/arch/powerpc/kernel/traps.c
@@ -1564,7 +1564,7 @@ void facility_unavailable_exception(struct pt_regs *regs)
        u8 status;
        bool hv;
 
-       hv = (regs->trap == 0xf80);
+       hv = (TRAP(regs) == 0xf80);
        if (hv)
                value = mfspr(SPRN_HFSCR);
        else
diff --git a/arch/powerpc/mm/fault.c b/arch/powerpc/mm/fault.c
index 6e1e39035380..7b15fe2ac986 100644
--- a/arch/powerpc/mm/fault.c
+++ b/arch/powerpc/mm/fault.c
@@ -576,7 +576,7 @@ void bad_page_fault(struct pt_regs *regs, unsigned long 
address, int sig)
 
        /* kernel has accessed a bad area */
 
-       switch (regs->trap) {
+       switch (TRAP(regs)) {
        case 0x300:
        case 0x380:
                printk(KERN_ALERT "Unable to handle kernel paging request for "
-- 
2.14.3