Skip to contentSkip to conversation

FAILED: patch "[PATCH] MIPS: CPS: Don't include MT code in non-MT kernels." failed to apply to 4.1-stable tree

PATCH [email protected] 1 participant 1 message Oct 17, 2015

Subsystems (2)
lore
Share & tools
lore

[email protected]

author maintainer
#0 lore raw

The patch below does not apply to the 4.1-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 ------------------

Quoted 1 line

From a5b0f6db0e6cf6224e50f6585e9c8f0c2d38a8f8 Mon Sep 17 00:00:00 2001

From: Paul Burton <[email protected]>
Date: Wed, 5 Aug 2015 15:42:37 -0700
Subject: [PATCH] MIPS: CPS: Don't include MT code in non-MT kernels.

The MT-specific code in mips_cps_boot_vpes can safely be omitted from kernels which don't support MT, with the default VPE==0 case being used as it would be after the has_mt (Config3.MT) check failed at runtime. Discarding the code entirely will save us a few bytes & allow cleaner handling of MT ASE instructions by later patches.

Patchwork: https://patchwork.linux-mips.org/patch/10866/

arch/mips/kernel/cps-vec.S +2 -0
index fa159aab252c..57642f56dffb 100644
@@ -311,6 +311,7 @@ LEAF(mips_cps_boot_vpes)
 
 	/* Calculate this VPEs ID. If the core doesn't support MT use 0 */
 	li	t9, 0
+#ifdef CONFIG_MIPS_MT
 	has_mt	ta2, 1f
 
 	/* Find the number of VPEs present in the core */
@@ -330,6 +331,7 @@ LEAF(mips_cps_boot_vpes)
 	/* Retrieve the VPE ID from EBase.CPUNum */
 	mfc0	t9, $15, 1
 	and	t9, t9, t1
+#endif
 
 1:	/* Calculate a pointer to this VPEs struct vpe_boot_config */
 	li	t1, VPEBOOTCFG_SIZE