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Sun, 1 Dec 2019 01:52:12 +0000 (UTC) Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 9CEA9206E1; Sun, 1 Dec 2019 01:52:10 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1575165132; bh=hg2ioVqjRk9AfqqPl2ctHXljgV7rZOvOBD+AtGdC1sE=; h=Date:From:To:Subject:From; b=EKxw3JDWyC7+EWTQBZTjyHG+pPirHJONoI0z3he3rUtjW/Rlpn05QquiQ05fqeY4o 3lvMdKyVg1mCVyuFCMeO0+6cqU3N5TZA/GNWy4KiTwO4E6grRcgTPfKEg+rYxEh3tI stiiIx1bHp1cINCkU7ck367KWQj6aYq84Tvbu/lk= Date: Sat, 30 Nov 2019 17:52:10 -0800 From: akpm@linux-foundation.org To: akpm@linux-foundation.org, alex@ghiti.fr, aou@eecs.berkeley.edu, ard.biesheuvel@linaro.org, arnd@arndb.de, aryabinin@virtuozzo.com, benh@kernel.crashing.org, borntraeger@de.ibm.com, bp@alien8.de, catalin.marinas@arm.com, dave.hansen@linux.intel.com, dave.jiang@intel.com, davem@davemloft.net, dvyukov@google.com, glider@google.com, gor@linux.ibm.com, heiko.carstens@de.ibm.com, hpa@zytor.com, james.morse@arm.com, jhogan@kernel.org, kan.liang@linux.intel.com, linux-mm@kvack.org, linux@armlinux.org.uk, luto@kernel.org, mark.rutland@arm.com, mawilcox@microsoft.com, mingo@elte.hu, mm-commits@vger.kernel.org, mpe@ellerman.id.au, n-horiguchi@ah.jp.nec.com, palmer@sifive.com, paul.burton@mips.com, paul.walmsley@sifive.com, paulus@samba.org, peterz@infradead.org, ralf@linux-mips.org, shashim@codeaurora.org, steven.price@arm.com, tglx@linutronix.de, torvalds@linux-foundation.org, vgupta@synopsys.com, will@kernel.org, zong.li@sifive.com Subject: [patch 053/158] s390: mm: add p?d_leaf() definitions Message-ID: <20191201015210.3ZEhfXt41%akpm@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: From: Steven Price Subject: s390: mm: add p?d_leaf() definitions walk_page_range() is going to be allowed to walk page tables other than those of user space. For this it needs to know when it has reached a 'leaf' entry in the page tables. This information is provided by the p?d_leaf() functions/macros. For s390, pud_large() and pmd_large() are already implemented as static inline functions. Add a macro to provide the p?d_leaf names for the generic code to use. Link: http://lkml.kernel.org/r/20191028135910.33253-9-steven.price@arm.com Signed-off-by: Steven Price Cc: Heiko Carstens Cc: Vasily Gorbik Cc: Christian Borntraeger Cc: Albert Ou Cc: Alexander Potapenko Cc: Alexandre Ghiti Cc: Andrey Ryabinin Cc: Andy Lutomirski Cc: Ard Biesheuvel Cc: Arnd Bergmann Cc: Benjamin Herrenschmidt Cc: Borislav Petkov Cc: Catalin Marinas Cc: Dave Hansen Cc: Dave Jiang Cc: David S. Miller Cc: Dmitry Vyukov Cc: "H. Peter Anvin" Cc: Ingo Molnar Cc: James Hogan Cc: James Morse Cc: "Liang, Kan" Cc: Mark Rutland Cc: Matthew Wilcox Cc: Michael Ellerman Cc: Naoya Horiguchi Cc: Palmer Dabbelt Cc: Paul Burton Cc: Paul Mackerras Cc: Paul Walmsley Cc: Peter Zijlstra Cc: Ralf Baechle Cc: Russell King Cc: Shiraz Hashim Cc: Thomas Gleixner Cc: Vineet Gupta Cc: Will Deacon Cc: Zong Li Signed-off-by: Andrew Morton --- arch/s390/include/asm/pgtable.h | 2 ++ 1 file changed, 2 insertions(+) --- a/arch/s390/include/asm/pgtable.h~s390-mm-add-pd_leaf-definitions +++ a/arch/s390/include/asm/pgtable.h @@ -673,6 +673,7 @@ static inline int pud_none(pud_t pud) return pud_val(pud) == _REGION3_ENTRY_EMPTY; } +#define pud_leaf pud_large static inline int pud_large(pud_t pud) { if ((pud_val(pud) & _REGION_ENTRY_TYPE_MASK) != _REGION_ENTRY_TYPE_R3) @@ -690,6 +691,7 @@ static inline unsigned long pud_pfn(pud_ return (pud_val(pud) & origin_mask) >> PAGE_SHIFT; } +#define pmd_leaf pmd_large static inline int pmd_large(pmd_t pmd) { return (pmd_val(pmd) & _SEGMENT_ENTRY_LARGE) != 0;