sh: smp: shove a cpu_relax() in the plat_start_cpu() busy loop.



Without this, certain versions of GCC will happily optimize the entire
loop out.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>

parent 8c24594d

arch/sh/kernel/cpu/sh4a/smp-shx3.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -82,7 +82,7 @@ void plat_start_cpu(unsigned int cpu, unsigned long entry_point)
		ctrl_outl(STBCR_MSTP, STBCR_REG(cpu));

		while (!(ctrl_inl(STBCR_REG(cpu)) & STBCR_MSTP))
		;
		cpu_relax();

		/* Start up secondary processor by sending a reset */
		ctrl_outl(STBCR_AP_VAL, STBCR_REG(cpu));