s390/dumpstack: use bit fields to decode psw mask in show_registers() (1f021ea0) · Commits · e / devices / android_kernel_fairphone_FP4

arch/s390/kernel/dumpstack.c

+4 −13

Original line number	Diff line number	Diff line
		@@ -121,13 +121,9 @@ static void show_last_breaking_event(struct pt_regs *regs)
		printk(" [<%016lx>] %pSR\n", regs->args[0], (void *)regs->args[0]);
		}

		static inline int mask_bits(struct pt_regs *regs, unsigned long bits)
		{
		return (regs->psw.mask & bits) / ((~bits + 1) & bits);
		}

		void show_registers(struct pt_regs *regs)
		{
		struct psw_bits *psw = &psw_bits(regs->psw);
		char *mode;

		mode = user_mode(regs) ? "User" : "Krnl";
		@@ -136,14 +132,9 @@ void show_registers(struct pt_regs *regs)
		printk(" (%pSR)", (void *)regs->psw.addr);
		printk("\n");
		printk(" R:%x T:%x IO:%x EX:%x Key:%x M:%x W:%x "
		"P:%x AS:%x CC:%x PM:%x", mask_bits(regs, PSW_MASK_PER),
		mask_bits(regs, PSW_MASK_DAT), mask_bits(regs, PSW_MASK_IO),
		mask_bits(regs, PSW_MASK_EXT), mask_bits(regs, PSW_MASK_KEY),
		mask_bits(regs, PSW_MASK_MCHECK), mask_bits(regs, PSW_MASK_WAIT),
		mask_bits(regs, PSW_MASK_PSTATE), mask_bits(regs, PSW_MASK_ASC),
		mask_bits(regs, PSW_MASK_CC), mask_bits(regs, PSW_MASK_PM));
		printk(" RI:%x EA:%x", mask_bits(regs, PSW_MASK_RI),
		mask_bits(regs, PSW_MASK_EA \| PSW_MASK_BA));
		"P:%x AS:%x CC:%x PM:%x", psw->r, psw->t, psw->i, psw->e,
		psw->key, psw->m, psw->w, psw->p, psw->as, psw->cc, psw->pm);
		printk(" RI:%x EA:%x", psw->ri, psw->eaba);
		printk("\n%s GPRS: %016lx %016lx %016lx %016lx\n", mode,
		regs->gprs[0], regs->gprs[1], regs->gprs[2], regs->gprs[3]);
		printk(" %016lx %016lx %016lx %016lx\n",