x86/mm: Drop unused MAX_PHYSADDR_BITS (0a787b28) · Commits · 戴 / test

The macro is not used anywhere, and has an incorrect value (going by the comment) on x86_64 since commit ("x86: 46 bit physical address support on 64 bits") To avoid confusion, just remove the definition. Signed-off-by:

Arvind Sankar <nivedita@alum.mit.edu> Signed-off-by:

Thomas Gleixner <tglx@linutronix.de> Link: https://lkml.kernel.org/r/20200723231544.17274-2-nivedita@alum.mit.edu

arch/x86/include/asm/sparsemem.h

+1 −5

Original line number	Diff line number	Diff line
		@@ -10,24 +10,20 @@
		* field of the struct page
		*
		* SECTION_SIZE_BITS 2^n: size of each section
		* MAX_PHYSADDR_BITS 2^n: max size of physical address space
		* MAX_PHYSMEM_BITS 2^n: how much memory we can have in that space
		* MAX_PHYSMEM_BITS 2^n: max size of physical address space
		*
		*/

		#ifdef CONFIG_X86_32
		# ifdef CONFIG_X86_PAE
		# define SECTION_SIZE_BITS 29
		# define MAX_PHYSADDR_BITS 36
		# define MAX_PHYSMEM_BITS 36
		# else
		# define SECTION_SIZE_BITS 26
		# define MAX_PHYSADDR_BITS 32
		# define MAX_PHYSMEM_BITS 32
		# endif
		#else /* CONFIG_X86_32 */
		# define SECTION_SIZE_BITS 27 /* matt - 128 is convenient right now */
		# define MAX_PHYSADDR_BITS (pgtable_l5_enabled() ? 52 : 44)
		# define MAX_PHYSMEM_BITS (pgtable_l5_enabled() ? 52 : 46)
		#endif

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