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38 lines
1.2 KiB
Diff
38 lines
1.2 KiB
Diff
From: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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Date: Fri, 19 Feb 2021 17:51:07 +0100
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Subject: [PATCH] powerpc/mm: Move the linear_mapping_mutex to the ifdef where
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it is used
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The mutex linear_mapping_mutex is defined at the of the file while its
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only two user are within the CONFIG_MEMORY_HOTPLUG block.
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A compile without CONFIG_MEMORY_HOTPLUG set fails on PREEMPT_RT because
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its mutex implementation is smart enough to realize that it is unused.
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Move the definition of linear_mapping_mutex to ifdef block where it is
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used.
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Fixes: 1f73ad3e8d755 ("powerpc/mm: print warning in arch_remove_linear_mapping()")
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Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
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---
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arch/powerpc/mm/mem.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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--- a/arch/powerpc/mm/mem.c
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+++ b/arch/powerpc/mm/mem.c
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@@ -54,7 +54,6 @@
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#include <mm/mmu_decl.h>
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-static DEFINE_MUTEX(linear_mapping_mutex);
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unsigned long long memory_limit;
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bool init_mem_is_free;
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@@ -72,6 +71,7 @@ pgprot_t phys_mem_access_prot(struct fil
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EXPORT_SYMBOL(phys_mem_access_prot);
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#ifdef CONFIG_MEMORY_HOTPLUG
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+static DEFINE_MUTEX(linear_mapping_mutex);
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#ifdef CONFIG_NUMA
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int memory_add_physaddr_to_nid(u64 start)
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