linux-kernel - [PATCH v3 1/5] generic/pgtable: Make {pmd, pud}

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Message-ID: <154395942644.32119.10238934183949418128.stgit@dwillia2-desk3.amr.corp.intel.com>
Date:   Tue, 04 Dec 2018 13:37:06 -0800
From:   Dan Williams <dan.j.williams@...el.com>
To:     tglx@...utronix.de
Cc:     Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Borislav Petkov <bp@...en8.de>,
        Peter Zijlstra <peterz@...radead.org>,
        Dave Hansen <dave.hansen@...el.com>,
        "Kirill A. Shutemov" <kirill.shutemov@...ux.intel.com>,
        dave.hansen@...ux.intel.com, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v3 1/5] 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.

Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: Thomas Gleixner <tglx@...utronix.de>
Cc: Borislav Petkov <bp@...en8.de>
Cc: Peter Zijlstra <peterz@...radead.org>
Cc: Dave Hansen <dave.hansen@...el.com>
Acked-by: Kirill A. Shutemov <kirill.shutemov@...ux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@...el.com>
---
 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