From 19e68b2aec3c0a2bd770d3c358a296a1849f308a Mon Sep 17 00:00:00 2001
From: Mathieu Malaterre <malat@debian.org>
Date: Thu, 22 Mar 2018 22:03:18 +0100
Subject: [PATCH] powerpc/mm/radix: Fix always false comparison against
 MMU_NO_CONTEXT

References: bsc#1055186, fate#323286
Patch-mainline: v4.17-rc1
Git-commit: 19e68b2aec3c0a2bd770d3c358a296a1849f308a

In commit 9690c1574268 ("powerpc/mm/radix: Fix always false comparison
against MMU_NO_CONTEXT") an issue was discovered where `mm->context.id` was
being truncated to an `unsigned int`, while the PID is actually an
`unsigned long`. Update the earlier patch by fixing one remaining
occurrence. Discovered during a compilation with W=1:

  arch/powerpc/mm/tlb-radix.c:702:19: error: comparison is always false due to limited range of data type [-Werror=type-limits]

Signed-off-by: Mathieu Malaterre <malat@debian.org>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Acked-by: Michal Suchanek <msuchanek@suse.de>
---
 arch/powerpc/mm/tlb-radix.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/powerpc/mm/tlb-radix.c b/arch/powerpc/mm/tlb-radix.c
index a8b178dd2e82..2fba6170ab3f 100644
--- a/arch/powerpc/mm/tlb-radix.c
+++ b/arch/powerpc/mm/tlb-radix.c
@@ -706,7 +706,7 @@ void radix__flush_tlb_pte_p9_dd1(unsigned long old_pte, struct mm_struct *mm,
 #ifdef CONFIG_KVM_BOOK3S_HV_POSSIBLE
 extern void radix_kvm_prefetch_workaround(struct mm_struct *mm)
 {
-	unsigned int pid = mm->context.id;
+	unsigned long pid = mm->context.id;
 
 	if (unlikely(pid == MMU_NO_CONTEXT))
 		return;
-- 
2.13.6