From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mx0b-001b2d01.pphosted.com ([148.163.158.5]:19414 "EHLO mx0b-001b2d01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728548AbgIGSEk (ORCPT ); Mon, 7 Sep 2020 14:04:40 -0400 From: Gerald Schaefer Subject: [RFC PATCH v2 3/3] mm: make generic pXd_addr_end() macros inline functions Date: Mon, 7 Sep 2020 20:00:58 +0200 Message-Id: <20200907180058.64880-4-gerald.schaefer@linux.ibm.com> In-Reply-To: <20200907180058.64880-1-gerald.schaefer@linux.ibm.com> References: <20200907180058.64880-1-gerald.schaefer@linux.ibm.com> Sender: linux-s390-owner@vger.kernel.org List-ID: To: Jason Gunthorpe , John Hubbard Cc: LKML , linux-mm , linux-arch , Andrew Morton , Linus Torvalds , Russell King , Mike Rapoport , Catalin Marinas , Will Deacon , Michael Ellerman , Benjamin Herrenschmidt , Paul Mackerras , Jeff Dike , Richard Weinberger , Dave Hansen , Andy Lutomirski , Peter Zijlstra , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Arnd Bergmann , Andrey Ryabinin , linux-x86 , linux-arm , linux-power , linux-sparc , linux-um , linux-s390 , Alexander Gordeev , Vasily Gorbik , Heiko Carstens , Christian Borntraeger , Claudio Imbrenda From: Alexander Gordeev Since pXd_addr_end() macros take pXd page-table entry as a parameter it makes sense to check the entry type on compile. Even though most archs do not make use of page-table entries in pXd_addr_end() calls, checking the type in traversal code paths could help to avoid subtle bugs. Signed-off-by: Alexander Gordeev Signed-off-by: Gerald Schaefer --- include/linux/pgtable.h | 36 ++++++++++++++++++++---------------- 1 file changed, 20 insertions(+), 16 deletions(-) diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h index 67ebc22cf83d..d9e7d16c2263 100644 --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -656,31 +656,35 @@ static inline int arch_unmap_one(struct mm_struct *mm, */ #ifndef pgd_addr_end -#define pgd_addr_end(pgd, addr, end) \ -({ unsigned long __boundary = ((addr) + PGDIR_SIZE) & PGDIR_MASK; \ - (__boundary - 1 < (end) - 1)? __boundary: (end); \ -}) +#define pgd_addr_end pgd_addr_end +static inline unsigned long pgd_addr_end(pgd_t pgd, unsigned long addr, unsigned long end) +{ unsigned long __boundary = (addr + PGDIR_SIZE) & PGDIR_MASK; + return (__boundary - 1 < end - 1) ? __boundary : end; +} #endif #ifndef p4d_addr_end -#define p4d_addr_end(p4d, addr, end) \ -({ unsigned long __boundary = ((addr) + P4D_SIZE) & P4D_MASK; \ - (__boundary - 1 < (end) - 1)? __boundary: (end); \ -}) +#define p4d_addr_end p4d_addr_end +static inline unsigned long p4d_addr_end(p4d_t p4d, unsigned long addr, unsigned long end) +{ unsigned long __boundary = (addr + P4D_SIZE) & P4D_MASK; + return (__boundary - 1 < end - 1) ? __boundary : end; +} #endif #ifndef pud_addr_end -#define pud_addr_end(pud, addr, end) \ -({ unsigned long __boundary = ((addr) + PUD_SIZE) & PUD_MASK; \ - (__boundary - 1 < (end) - 1)? __boundary: (end); \ -}) +#define pud_addr_end pud_addr_end +static inline unsigned long pud_addr_end(pud_t pud, unsigned long addr, unsigned long end) +{ unsigned long __boundary = (addr + PUD_SIZE) & PUD_MASK; + return (__boundary - 1 < end - 1) ? __boundary : end; +} #endif #ifndef pmd_addr_end -#define pmd_addr_end(pmd, addr, end) \ -({ unsigned long __boundary = ((addr) + PMD_SIZE) & PMD_MASK; \ - (__boundary - 1 < (end) - 1)? __boundary: (end); \ -}) +#define pmd_addr_end pmd_addr_end +static inline unsigned long pmd_addr_end(pmd_t pmd, unsigned long addr, unsigned long end) +{ unsigned long __boundary = (addr + PMD_SIZE) & PMD_MASK; + return (__boundary - 1 < end - 1) ? __boundary : end; +} #endif /* -- 2.17.1