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authorStuart Menefy <stuart.menefy@st.com>2007-11-30 16:12:36 +0900
committerPaul Mundt <lethal@linux-sh.org>2008-01-28 13:18:58 +0900
commit1efe4ce3ca126da77e450d5a83f7201949d76f62 (patch)
treefbae9902aa4103a9e86d06f841d580f24682e7b3 /arch/sh/kernel/signal_32.c
parent53ff09422e5e7a6d6198b767c8f494e43ec8e3ae (diff)
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 <stuart.menefy@st.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
Diffstat (limited to 'arch/sh/kernel/signal_32.c')
-rw-r--r--arch/sh/kernel/signal_32.c18
1 files changed, 0 insertions, 18 deletions
diff --git a/arch/sh/kernel/signal_32.c b/arch/sh/kernel/signal_32.c
index ca754fd42437..f6b5fbfe75c4 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 */