FAILED: patch "[PATCH] MIPS: KVM: Fix CACHE immediate offset sign extension" failed to apply to 3.10-stable tree

The patch below does not apply to the 3.10-stable tree.
If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to <[email protected]>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

From: James Hogan <[email protected]>
Date: Wed, 11 Nov 2015 14:21:19 +0000
Subject: [PATCH] MIPS: KVM: Fix CACHE immediate offset sign extension

The immediate field of the CACHE instruction is signed, so ensure that it gets sign extended by casting it to an int16_t rather than just masking the low 16 bits.

index d5fa3eaf39a1..41b1b090f56f 100644
@@ -1581,7 +1581,7 @@ enum emulation_result kvm_mips_emulate_cache(uint32_t inst, uint32_t *opc,
 
 	base = (inst >> 21) & 0x1f;
 	op_inst = (inst >> 16) & 0x1f;
-	offset = inst & 0xffff;
+	offset = (int16_t)inst;
 	cache = (inst >> 16) & 0x3;
 	op = (inst >> 18) & 0x7;