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| author |   Stuart Menefy <stuart.menefy@st.com> | 2007-11-30 16:12:36 +0900 |
|---|---|---|
| committer |   Paul Mundt <lethal@linux-sh.org> | 2008-01-28 13:18:58 +0900 |
| commit | 1efe4ce3ca126da77e450d5a83f7201949d76f62 (patch) | |
| tree | fbae9902aa4103a9e86d06f841d580f24682e7b3 /arch/sh/kernel/signal_32.c | |
| parent | sh: Fix compile error of arch/sh/mm/pmb.c (diff) | |
| download | linux-dev-1efe4ce3ca126da77e450d5a83f7201949d76f62.tar.xz linux-dev-1efe4ce3ca126da77e450d5a83f7201949d76f62.zip | |
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 '')
| -rw-r--r-- | arch/sh/kernel/signal_32.c | 18 |
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 */ |