linux-kernel - [PATCH v3] powerpc: Fixup for v3 "powerpc/nohash: Refactor update of BDI2000 pointers in switch_mmu

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Date:   Mon,  7 Jun 2021 09:52:38 +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 v3] powerpc: Fixup for v3 "powerpc/nohash: Refactor update of
 BDI2000 pointers in switch_mmu_context()" in next-test

As mentionned in history, v3 doesn't apply to book3s/32 so the hunk
on head_book3s_32.S has to be dropped from the commit mentionned
in the title.

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
Michael, tell me if you prefer a v4 of the series.
---
 arch/powerpc/kernel/head_book3s_32.S | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/arch/powerpc/kernel/head_book3s_32.S b/arch/powerpc/kernel/head_book3s_32.S
index 32c27dac9b80..326262030279 100644
--- a/arch/powerpc/kernel/head_book3s_32.S
+++ b/arch/powerpc/kernel/head_book3s_32.S
@@ -1282,3 +1282,9 @@ EXPORT_SYMBOL(empty_zero_page)
 	.globl	swapper_pg_dir
 swapper_pg_dir:
 	.space	PGD_TABLE_SIZE
+
+/* Room for two PTE pointers, usually the kernel and current user pointers
+ * to their respective root page table.
+ */
+abatron_pteptrs:
+	.space	8
-- 
2.25.0