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ed7588d5dc
pgtable_l5_enabled is defined using cpu_feature_enabled() but we refer to it as a variable. This is misleading. Make pgtable_l5_enabled() a function. We cannot literally define it as a function due to circular dependencies between header files. Function-alike macros is close enough. Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Cc: Hugh Dickins <hughd@google.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lkml.kernel.org/r/20180518103528.59260-4-kirill.shutemov@linux.intel.com Signed-off-by: Ingo Molnar <mingo@kernel.org>
36 lines
994 B
C
36 lines
994 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ASM_X86_SPARSEMEM_H
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#define _ASM_X86_SPARSEMEM_H
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#ifdef CONFIG_SPARSEMEM
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/*
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* generic non-linear memory support:
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*
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* 1) we will not split memory into more chunks than will fit into the flags
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* field of the struct page
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*
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* SECTION_SIZE_BITS 2^n: size of each section
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* MAX_PHYSADDR_BITS 2^n: max size of physical address space
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* MAX_PHYSMEM_BITS 2^n: how much memory we can have in that space
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*
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*/
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#ifdef CONFIG_X86_32
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# ifdef CONFIG_X86_PAE
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# define SECTION_SIZE_BITS 29
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# define MAX_PHYSADDR_BITS 36
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# define MAX_PHYSMEM_BITS 36
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# else
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# define SECTION_SIZE_BITS 26
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# define MAX_PHYSADDR_BITS 32
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# define MAX_PHYSMEM_BITS 32
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# endif
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#else /* CONFIG_X86_32 */
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# define SECTION_SIZE_BITS 27 /* matt - 128 is convenient right now */
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# define MAX_PHYSADDR_BITS (pgtable_l5_enabled() ? 52 : 44)
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# define MAX_PHYSMEM_BITS (pgtable_l5_enabled() ? 52 : 46)
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#endif
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#endif /* CONFIG_SPARSEMEM */
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#endif /* _ASM_X86_SPARSEMEM_H */
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