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bh=KsgBZKiNNdVU9A9eEIcQRL879OD2WdX41NJw/witcyM=; b=M7rbvyhDuA7xOuE4vbJyuBb/gdBiI1iXdcgmIgStdga8h8QEEq2wRvCj AT2thYa24W3yHVs4nIU49PVr3ShBhaX0b6y8JiMkfI8+aczik0QCPbvM9 vOhMhTZ6+FiKPCvxfX+d3iJ1SdwNdy3mkmzt+zBBwmqag7zhy8u8y/2vR J61XJydd9ZNkhyKmoC/PzId5cCoc0Y0mCxpwDFbWR2tunnPjR3rK33AWq QkYljOLu38Z592C008hTuNyUPDl0KOH/5O/C/Vt93zi0b9JHluHKmLI1J ZufZ/q4db6HvFDkSxpRtL7QUgyBWnwyXdJA8f7wxkWPoepnt7zJ3NzMae w==; X-IronPort-AV: E=McAfee;i="6600,9927,10795"; a="361159624" X-IronPort-AV: E=Sophos;i="6.01,158,1684825200"; d="scan'208";a="361159624" Received: from orsmga003.jf.intel.com ([10.7.209.27]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Aug 2023 23:12:43 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10795"; a="681553232" X-IronPort-AV: E=Sophos;i="6.01,158,1684825200"; d="scan'208";a="681553232" Received: from fyin-dev.sh.intel.com ([10.239.159.32]) by orsmga003.jf.intel.com with ESMTP; 08 Aug 2023 23:12:37 -0700 From: Yin Fengwei To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, akpm@linux-foundation.org, yuzhao@google.com, willy@infradead.org, hughd@google.com, yosryahmed@google.com, ryan.roberts@arm.com, david@redhat.com, shy828301@gmail.com Cc: fengwei.yin@intel.com Subject: [PATCH v2 1/3] mm: add functions folio_in_range() and folio_within_vma() Date: Wed, 9 Aug 2023 14:11:03 +0800 Message-Id: <20230809061105.3369958-2-fengwei.yin@intel.com> X-Mailer: git-send-email 2.39.2 In-Reply-To: <20230809061105.3369958-1-fengwei.yin@intel.com> References: <20230809061105.3369958-1-fengwei.yin@intel.com> MIME-Version: 1.0 X-Rspamd-Queue-Id: 797612001F X-Rspam-User: X-Rspamd-Server: rspam04 X-Stat-Signature: om46nuzuow9wmmu6tmejxheu6ptwpijw X-HE-Tag: 1691561566-367280 X-HE-Meta: U2FsdGVkX18K+FiKsIZr5MtbeXqz0v7fjvfWMy14BIwD6yWgU+a5eLle/JsQNtcAT9ZPc+do6twJgJveaOstFQqL0IoqDQE7owHxZ21luammDucHKSSYu6Fgi3fjudEOmWPA7CKAfJ0U79QS62NFqRTkz/FKWcw41iKKveyVHoWcCU4c5HqnXeF3iKfUPidfYzhwdYUVsZ53TUtibD+CQgih/mGA/KI+Dgb7feHonLyGRL6R5eZ8RRact7CMXcS8CBxzCWb1iqTTFJZVS6cH/W0M0BnAyjDLMwVlfhfBF2IrbGIUYhb8tTwiwFTorG+gF7TmzYl5US9rUGE5UPHrV/KMJ3Gk71GzD6+87/hGhnO3nOLc7906RAgjBLyr7aF8gqzTxgwFFPKdinC5Nt0Qt1WgsxYiVz+xHdiyWdMBjyO8DJXhUVxYozZFPHs0qv42neuLcD4oFvsjkfGG2iyfd4kFUv1EqtEozlDkFdZodclpydn5nMsaXYQ3Sg/MKP+AXk1U8UhTVJL+J9O0t2zdtV8y1KTOBhctGUq8ibMqg+pqWpEleqHsw08/6QyJxdHKdIIYkrH6Cmgm3nB0kqYzdouVtgJY54cb4m7G4cink0CYVpj29JQ566B0cY+/8KURrjb4Jkb6Fj1spFh1GJXSYGVvj0jBAtvISuDzICsYQf9/BVgK8kclXHp6/4J883Cu0pId2pso+esc7tOryfAvMuyCapw73NcPikNskjjHr3n5zPXrd4mkLjXFGJZYMpMia4jRe4hYgW4HJX0p0We6lOz/WGGIIk4QybAgsuc6wzSE8FMG2PK9C+oh+hNnYluZG9miF4N469UUS4rGz3/WZxgR7c2vNfl00qtNrWWx4iIIr7ycENqfjrE9H9rXNa81vcb8EmudfgpaxK7WKZK+PKGj1hHMtvkAZz7Jh83Uu8b8hd/yKRonftpggLrr9P5wwManDDWlYumZ2cKRm4p HJc/KCMP d9T8yh8oDBKiG/5oTQA8ryHiGxdXL82sTALWMzw/iwCGWiDD2ndpSR1VBNMCw4LfexS7tfoaDe5m2z07FNx3zsD16fM5R/WTZ1DzQllL/EmB37zWtgC3C3PV3v5nCWOTA01NTQUMlwGfsnX/AK7kYY0Fyx7lLpmXPIGGtavr0Sl2ZJi4S0TILOkfp0oIncZhz+Zsc/+a4LCPGkq4= 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: It will be used to check whether the folio is mapped to specific VMA and whether the mapping address of folio is in the range. Also a helper function folio_within_vma() to check whether folio is in the range of vma based on folio_in_range(). Signed-off-by: Yin Fengwei --- mm/internal.h | 35 +++++++++++++++++++++++++++++++++++ 1 file changed, 35 insertions(+) diff --git a/mm/internal.h b/mm/internal.h index 154da4f0d557..5d1b71010fd2 100644 --- a/mm/internal.h +++ b/mm/internal.h @@ -585,6 +585,41 @@ extern long faultin_vma_page_range(struct vm_area_struct *vma, bool write, int *locked); extern bool mlock_future_ok(struct mm_struct *mm, unsigned long flags, unsigned long bytes); + +static inline bool +folio_in_range(struct folio *folio, struct vm_area_struct *vma, + unsigned long start, unsigned long end) +{ + pgoff_t pgoff, addr; + unsigned long vma_pglen = (vma->vm_end - vma->vm_start) >> PAGE_SHIFT; + + VM_WARN_ON_FOLIO(folio_test_ksm(folio), folio); + if (start > end) + return false; + + if (start < vma->vm_start) + start = vma->vm_start; + + if (end > vma->vm_end) + end = vma->vm_end; + + pgoff = folio_pgoff(folio); + + /* if folio start address is not in vma range */ + if (!in_range(pgoff, vma->vm_pgoff, vma_pglen)) + return false; + + addr = vma->vm_start + ((pgoff - vma->vm_pgoff) << PAGE_SHIFT); + + return !(addr < start || end - addr < folio_size(folio)); +} + +static inline bool +folio_within_vma(struct folio *folio, struct vm_area_struct *vma) +{ + return folio_in_range(folio, vma, vma->vm_start, vma->vm_end); +} + /* * mlock_vma_folio() and munlock_vma_folio(): * should be called with vma's mmap_lock held for read or write,