UPSTREAM: arm64: traps: address fallout from printk -> pr_* conversion

Commit ac7b406c1a9d ("arm64: Use pr_* instead of printk") was a fairly
mindless s/printk/pr_*/ change driven by a complaint from checkpatch.

As is usual with such changes, this has led to some odd behaviour on
arm64:

  * syslog now picks up the "pr_emerg" line from dump_backtrace, but not
    the actual trace, which leads to a bunch of "kernel:Call trace:"
    lines in the log

  * __{pte,pmd,pgd}_error print at KERN_CRIT, as opposed to KERN_ERR
    which is used by other architectures.

This patch restores the original printk behaviour for dump_backtrace
and downgrade the pgtable error macros to KERN_ERR.

Signed-off-by: Will Deacon <will.deacon@arm.com>
Bug: 30369029
Patchset: rework-pagetable

(cherry picked from commit c9cd0ed925c0b927283d4739bfe689eb9d1e9dfd)
Signed-off-by: Jeff Vander Stoep <jeffv@google.com>
Change-Id: Iaf028e5368df4623f7257ef432a7f9da86261609

diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c
index bdc293f6adc43b347c85272d4868a3975f67fe72..cbedd724f48efcf487e443fa3fc21516d8d898a6 100644 (file)
--- a/arch/arm64/kernel/traps.c
+++ b/arch/arm64/kernel/traps.c
@@ -171,7 +171,7 @@ static void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk)
 #endif
 
        skip = !!regs;
-       pr_emerg("Call trace:\n");
+       printk("Call trace:\n");
        while (1) {
                unsigned long where = frame.pc;
                unsigned long stack;
@@ -482,22 +482,22 @@ asmlinkage void bad_mode(struct pt_regs *regs, int reason, unsigned int esr)
 
 void __pte_error(const char *file, int line, unsigned long val)
 {
-       pr_crit("%s:%d: bad pte %016lx.\n", file, line, val);
+       pr_err("%s:%d: bad pte %016lx.\n", file, line, val);
 }
 
 void __pmd_error(const char *file, int line, unsigned long val)
 {
-       pr_crit("%s:%d: bad pmd %016lx.\n", file, line, val);
+       pr_err("%s:%d: bad pmd %016lx.\n", file, line, val);
 }
 
 void __pud_error(const char *file, int line, unsigned long val)
 {
-       pr_crit("%s:%d: bad pud %016lx.\n", file, line, val);
+       pr_err("%s:%d: bad pud %016lx.\n", file, line, val);
 }
 
 void __pgd_error(const char *file, int line, unsigned long val)
 {
-       pr_crit("%s:%d: bad pgd %016lx.\n", file, line, val);
+       pr_err("%s:%d: bad pgd %016lx.\n", file, line, val);
 }
 
 /* GENERIC_BUG traps */