linux-kernel - [PATCH] powerpc: Avoid reserving hugepages twice on PPC32

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Message-ID: <87d18klgoj.fsf@linutronix.de>
Date:   Fri, 28 Jul 2017 17:33:32 +0200
From:   John Ogness <john.ogness@...utronix.de>
To:     mpe@...erman.id.au
Cc:     linuxppc-dev@...ts.ozlabs.org, linux-kernel@...r.kernel.org
Subject: [PATCH] powerpc: Avoid reserving hugepages twice on PPC32

On PPC32, reserve_hugetlb_gpages() is already called in MMU_init().

Signed-off-by: John Ogness <john.ogness@...utronix.de>
---
 arch/powerpc/kernel/setup-common.c |    3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
index 94a9482..1d5d2de 100644
--- a/arch/powerpc/kernel/setup-common.c
+++ b/arch/powerpc/kernel/setup-common.c
@@ -920,8 +920,11 @@ void __init setup_arch(char **cmdline_p)
 	 * Reserve any gigantic pages requested on the command line.
 	 * memblock needs to have been initialized by the time this is
 	 * called since this will reserve memory.
+	 * (PPC32 did this already in MMU_init())
 	 */
+#ifdef CONFIG_PPC64
 	reserve_hugetlb_gpages();
+#endif
 
 	klp_init_thread_info(&init_thread_info);
 
-- 
1.7.10.4