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| author | Thomas Gleixner <tglx@linutronix.de> | 2010-04-13 14:12:17 +0200 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2010-04-13 14:12:17 +0200 |
| commit | 7c7145f6acc68100dbdc5d3c5c64fe3af1c99c89 (patch) | |
| tree | 5e93e3eb4787229032f1df222fa490112f4b0c32 /arch/mips/include/asm/stackframe.h | |
| parent | 92d6b71ab906be706f3679353b30a8d2c3831144 (diff) | |
| parent | 0d0fb0f9c5fddef4a10242fe3337f00f528a3099 (diff) | |
| download | olio-linux-3.10-7c7145f6acc68100dbdc5d3c5c64fe3af1c99c89.tar.xz olio-linux-3.10-7c7145f6acc68100dbdc5d3c5c64fe3af1c99c89.zip | |
Merge branch 'linus' into irq/core
Reason: Get the upstream IRQF_DISABLED related changes.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/mips/include/asm/stackframe.h')
| -rw-r--r-- | arch/mips/include/asm/stackframe.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/mips/include/asm/stackframe.h b/arch/mips/include/asm/stackframe.h index 3b6da3330e3..c8419129e77 100644 --- a/arch/mips/include/asm/stackframe.h +++ b/arch/mips/include/asm/stackframe.h @@ -121,6 +121,25 @@ .endm #else .macro get_saved_sp /* Uniprocessor variation */ +#ifdef CONFIG_CPU_LOONGSON2F + /* + * Clear BTB (branch target buffer), forbid RAS (return address + * stack) to workaround the Out-of-order Issue in Loongson2F + * via its diagnostic register. + */ + move k0, ra + jal 1f + nop +1: jal 1f + nop +1: jal 1f + nop +1: jal 1f + nop +1: move ra, k0 + li k0, 3 + mtc0 k0, $22 +#endif /* CONFIG_CPU_LOONGSON2F */ #if defined(CONFIG_32BIT) || defined(KBUILD_64BIT_SYM32) lui k1, %hi(kernelsp) #else |