linux-kernel - [PATCH v1 1/6] powerpc/8xx: DEBUG_PAGEALLOC doesn't require an ITLB miss exception handler

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Message-Id: <e796c5fcb5898de827c803cf1ab8ba1d7a5d4b76.1606231483.git.christophe.leroy@csgroup.eu>
Date:   Tue, 24 Nov 2020 15:24:54 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v1 1/6] powerpc/8xx: DEBUG_PAGEALLOC doesn't require an ITLB
 miss exception handler

Since commit e611939fc8ec ("powerpc/mm: Ensure change_page_attr()
doesn't invalidate pinned TLBs"), pinned TLBs are not anymore
invalidated by __kernel_map_pages() when CONFIG_DEBUG_PAGEALLOC is
selected.

Remove the dependency on CONFIG_DEBUG_PAGEALLOC.

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 arch/powerpc/kernel/head_8xx.S | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/powerpc/kernel/head_8xx.S b/arch/powerpc/kernel/head_8xx.S
index ee0bfebc375f..66ee62f30d36 100644
--- a/arch/powerpc/kernel/head_8xx.S
+++ b/arch/powerpc/kernel/head_8xx.S
@@ -47,8 +47,7 @@
  * - Either we have modules
  * - Or we have not pinned the first 8M
  */
-#if defined(CONFIG_MODULES) || !defined(CONFIG_PIN_TLB_TEXT) || \
-    defined(CONFIG_DEBUG_PAGEALLOC)
+#if defined(CONFIG_MODULES) || !defined(CONFIG_PIN_TLB_TEXT)
 #define ITLB_MISS_KERNEL	1
 #endif
 
-- 
2.25.0