linux-kernel - [tip: x86/cleanups] x86/mm: Drop unused MAX_PHYSADDR

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Date:   Fri, 24 Jul 2020 07:56:53 -0000
From:   "tip-bot2 for Arvind Sankar" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     Arvind Sankar <nivedita@...m.mit.edu>,
        Thomas Gleixner <tglx@...utronix.de>, x86 <x86@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: [tip: x86/cleanups] x86/mm: Drop unused MAX_PHYSADDR_BITS

The following commit has been merged into the x86/cleanups branch of tip:

Commit-ID:     0a787b28b7a375ad9d5c77bc3922ae1a8305239e
Gitweb:        https://git.kernel.org/tip/0a787b28b7a375ad9d5c77bc3922ae1a8305239e
Author:        Arvind Sankar <nivedita@...m.mit.edu>
AuthorDate:    Thu, 23 Jul 2020 19:15:42 -04:00
Committer:     Thomas Gleixner <tglx@...utronix.de>
CommitterDate: Fri, 24 Jul 2020 09:53:06 +02:00

x86/mm: Drop unused MAX_PHYSADDR_BITS

The macro is not used anywhere, and has an incorrect value (going by the
comment) on x86_64 since commit c898faf91b3e ("x86: 46 bit physical address
support on 64 bits")

To avoid confusion, just remove the definition.

Signed-off-by: Arvind Sankar <nivedita@...m.mit.edu>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Link: https://lkml.kernel.org/r/20200723231544.17274-2-nivedita@alum.mit.edu

---
 arch/x86/include/asm/sparsemem.h | 6 +-----
 1 file changed, 1 insertion(+), 5 deletions(-)

diff --git a/arch/x86/include/asm/sparsemem.h b/arch/x86/include/asm/sparsemem.h
index 1992187..6bfc878 100644
--- a/arch/x86/include/asm/sparsemem.h
+++ b/arch/x86/include/asm/sparsemem.h
@@ -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