linux-kernel - [tip:x86/mm] generic/pgtable: Make {pmd, pud}

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Date:   Wed, 5 Dec 2018 10:05:03 -0800
From:   tip-bot for Dan Williams <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     dan.j.williams@...el.com, bp@...en8.de, mingo@...nel.org,
        tglx@...utronix.de, riel@...riel.com, linux-kernel@...r.kernel.org,
        dave.hansen@...ux.intel.com, torvalds@...ux-foundation.org,
        bigeasy@...utronix.de, luto@...nel.org, hpa@...or.com,
        kirill.shutemov@...ux.intel.com, peterz@...radead.org
Subject: [tip:x86/mm] generic/pgtable: Make {pmd, pud}_same()
 unconditionally available

Commit-ID:  c683c37cd13246941924c48f6c6a9863425e0cec
Gitweb:     https://git.kernel.org/tip/c683c37cd13246941924c48f6c6a9863425e0cec
Author:     Dan Williams <dan.j.williams@...el.com>
AuthorDate: Tue, 4 Dec 2018 13:37:06 -0800
Committer:  Ingo Molnar <mingo@...nel.org>
CommitDate: Wed, 5 Dec 2018 09:03:05 +0100

generic/pgtable: Make {pmd, pud}_same() unconditionally available

In preparation for {pmd,pud}_same() to be used outside of transparent
huge page code paths, make them unconditionally available. This enables
them to be used in the definition of a new family of
set_{pte,pmd,pud,p4d,pgd}_safe() helpers.

Signed-off-by: Dan Williams <dan.j.williams@...el.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Cc: Andy Lutomirski <luto@...nel.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Dave Hansen <dave.hansen@...ux.intel.com>
Cc: H. Peter Anvin <hpa@...or.com>
Cc: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Rik van Riel <riel@...riel.com>
Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: Thomas Gleixner <tglx@...utronix.de>
Link: http://lkml.kernel.org/r/154395942644.32119.10238934183949418128.stgit@dwillia2-desk3.amr.corp.intel.com
Signed-off-by: Ingo Molnar <mingo@...nel.org>
---
 include/asm-generic/pgtable.h | 14 --------------
 1 file changed, 14 deletions(-)

diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h
index 359fb935ded6..eea50ef8b8cd 100644
--- a/include/asm-generic/pgtable.h
+++ b/include/asm-generic/pgtable.h
@@ -375,7 +375,6 @@ static inline int pte_unused(pte_t pte)
 #endif
 
 #ifndef __HAVE_ARCH_PMD_SAME
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
 static inline int pmd_same(pmd_t pmd_a, pmd_t pmd_b)
 {
 	return pmd_val(pmd_a) == pmd_val(pmd_b);
@@ -385,19 +384,6 @@ static inline int pud_same(pud_t pud_a, pud_t pud_b)
 {
 	return pud_val(pud_a) == pud_val(pud_b);
 }
-#else /* CONFIG_TRANSPARENT_HUGEPAGE */
-static inline int pmd_same(pmd_t pmd_a, pmd_t pmd_b)
-{
-	BUILD_BUG();
-	return 0;
-}
-
-static inline int pud_same(pud_t pud_a, pud_t pud_b)
-{
-	BUILD_BUG();
-	return 0;
-}
-#endif /* CONFIG_TRANSPARENT_HUGEPAGE */
 #endif
 
 #ifndef __HAVE_ARCH_DO_SWAP_PAGE