powerpc/xmon: Don't print hashed pointers in xmon

Since commit ad67b74d2469 ("printk: hash addresses printed with %p")
pointers printed with %p are hashed, ie. you don't see the actual
pointer value but rather a cryptographic hash of its value.

In xmon we want to see the actual pointer values, because xmon is a
debugger, so replace %p with %px which prints the actual pointer
value.

We justify doing this in xmon because 1) xmon is a kernel crash
debugger, it's only accessible via the console 2) xmon doesn't print
to dmesg, so the pointers it prints are not able to be leaked that
way.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c
index 1b2d8cb49abb2e8ea209a511bd239dd58e710661..cab24f549e7cbdc8786c5fa5b7450f0dcda8d87c 100644 (file)
--- a/arch/powerpc/xmon/xmon.c
+++ b/arch/powerpc/xmon/xmon.c
@@ -1590,7 +1590,7 @@ static void print_bug_trap(struct pt_regs *regs)
        printf("kernel BUG at %s:%u!\n",
               bug->file, bug->line);
 #else
-       printf("kernel BUG at %p!\n", (void *)bug->bug_addr);
+       printf("kernel BUG at %px!\n", (void *)bug->bug_addr);
 #endif
 #endif /* CONFIG_BUG */
 }
@@ -2329,7 +2329,7 @@ static void dump_one_paca(int cpu)
 
        p = &paca[cpu];
 
-       printf("paca for cpu 0x%x @ %p:\n", cpu, p);
+       printf("paca for cpu 0x%x @ %px:\n", cpu, p);
 
        printf(" %-*s = %s\n", 20, "possible", cpu_possible(cpu) ? "yes" : "no");
        printf(" %-*s = %s\n", 20, "present", cpu_present(cpu) ? "yes" : "no");
@@ -2945,7 +2945,7 @@ static void show_task(struct task_struct *tsk)
                (tsk->exit_state & EXIT_DEAD) ? 'E' :
                (tsk->state & TASK_INTERRUPTIBLE) ? 'S' : '?';
 
-       printf("%p %016lx %6d %6d %c %2d %s\n", tsk,
+       printf("%px %016lx %6d %6d %c %2d %s\n", tsk,
                tsk->thread.ksp,
                tsk->pid, tsk->parent->pid,
                state, task_thread_info(tsk)->cpu,
@@ -2988,7 +2988,7 @@ static void show_pte(unsigned long addr)
 
        if (setjmp(bus_error_jmp) != 0) {
                catch_memory_errors = 0;
-               printf("*** Error dumping pte for task %p\n", tsk);
+               printf("*** Error dumping pte for task %px\n", tsk);
                return;
        }
 
@@ -3074,7 +3074,7 @@ static void show_tasks(void)
 
        if (setjmp(bus_error_jmp) != 0) {
                catch_memory_errors = 0;
-               printf("*** Error dumping task %p\n", tsk);
+               printf("*** Error dumping task %px\n", tsk);
                return;
        }