From 1efe4ce3ca126da77e450d5a83f7201949d76f62 Mon Sep 17 00:00:00 2001 From: Stuart Menefy Date: Fri, 30 Nov 2007 16:12:36 +0900 Subject: sh: GUSA atomic rollback support. This implements kernel-level atomic rollback built on top of gUSA, as an alternative non-IRQ based atomicity method. This is generally a faster method for platforms that are lacking the LL/SC pairs that SH-4A and later use, and is only supportable on legacy cores. Signed-off-by: Stuart Menefy Signed-off-by: Paul Mundt --- arch/sh/kernel/signal_32.c | 18 ------------------ 1 file changed, 18 deletions(-) (limited to 'arch/sh/kernel/signal_32.c') diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c index ca754fd4243..f6b5fbfe75c 100644 --- a/arch/sh/kernel/signal_32.c +++ b/arch/sh/kernel/signal_32.c @@ -507,24 +507,6 @@ handle_signal(unsigned long sig, struct k_sigaction *ka, siginfo_t *info, ctrl_inw(regs->pc - 4)); break; } -#ifdef CONFIG_GUSA - } else { - /* gUSA handling */ - preempt_disable(); - - if (regs->regs[15] >= 0xc0000000) { - int offset = (int)regs->regs[15]; - - /* Reset stack pointer: clear critical region mark */ - regs->regs[15] = regs->regs[1]; - if (regs->pc < regs->regs[0]) - /* Go to rewind point #1 */ - regs->pc = regs->regs[0] + offset - - instruction_size(ctrl_inw(regs->pc-4)); - } - - preempt_enable_no_resched(); -#endif } /* Set up the stack frame */ -- cgit v1.2.3