Commit f7a678a8 authored Oct 11, 2019 by Michael Ellerman

powerpc/udbg: Make it safe to call udbg_printf() always



Make udbg_printf() check if udbg_putc is set, and if not just return.
This makes it safe to call udbg_printf() anytime, even when a udbg
backend has not been registered, which means we can avoid some ifdefs
at call sites.

Signed-off-by: Qian Cai <cai@lca.pw>
[mpe: Split out of larger patch, write change log]
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

parent cd1d55f1

arch/powerpc/kernel/udbg.c

+8 −6

Original line number	Diff line number	Diff line
		@@ -120,6 +120,7 @@ int udbg_write(const char *s, int n)
		#define UDBG_BUFSIZE 256
		void udbg_printf(const char *fmt, ...)
		{
		if (udbg_putc) {
		char buf[UDBG_BUFSIZE];
		va_list args;

		@@ -128,6 +129,7 @@ void udbg_printf(const char *fmt, ...)
		udbg_puts(buf);
		va_end(args);
		}
		}

		void __init udbg_progress(char *s, unsigned short hex)
		{

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