From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Vishal Moola (Oracle)" Subject: [PATCH v4 07/34] mm: Convert ptlock_alloc() to use ptdescs Date: Mon, 12 Jun 2023 14:03:56 -0700 Message-ID: <20230612210423.18611-8-vishal.moola@gmail.com> References: <20230612210423.18611-1-vishal.moola@gmail.com> Mime-Version: 1.0 Content-Transfer-Encoding: 8bit Return-path: List-Id: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20221208; t=1686603900; x=1689195900; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=csibueTQMI8hz/axFpDokmCUVKS4XWTLf0OEMRBu+sg=; b=FDAUnHm2faFSWGwfZS5hO+D9w8GP4e4g1ML7/tmHqNMsyYqyAD51ooe/UZAynheb45 JUNAZVEGWiy3FM+aYWlvoHKaBUFoNzNTwUdIl4kQAVJN12Picp2GbnIh1UwydO/qddyi DCuNf5aNp8X4OTmdAm+cAeL3CGsOgaZ27ub95e/8MTqIlBQGK4N048waW9QZBpSO9XHI sWfFM9CmbvJbA3uGm5rS2JNk4GtvKzbhh98S182OZhG/f2sSkxT71cjOLs4vhjGq3bqf ArQftxucDa5+VY1eeLZl1/JDXSt6Px6z9h8EFmxArPTIN+H3XkndN1zswUa8dX9vrXU3 5Q2g== In-Reply-To: <20230612210423.18611-1-vishal.moola@gmail.com> Content-Type: text/plain; charset="us-ascii" To: Andrew Morton , Matthew Wilcox Cc: linux-mm@kvack.org, linux-arch@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-csky@vger.kernel.org, linux-hexagon@vger.kernel.org, loongarch@lists.linux.dev, linux-m68k@lists.linux-m68k.org, linux-mips@vger.kernel.org, linux-openrisc@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-riscv@lists.infradead.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-um@lists.infradead.org, xen-devel@lists.xenproject.org, kvm@vger.kernel.org, Hugh Dickins , "Vishal Moola (Oracle)" This removes some direct accesses to struct page, working towards splitting out struct ptdesc from struct page. Signed-off-by: Vishal Moola (Oracle) --- include/linux/mm.h | 6 +++--- mm/memory.c | 4 ++-- 2 files changed, 5 insertions(+), 5 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index 088b7664f897..e6f1be2a405e 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2825,7 +2825,7 @@ static inline void pagetable_clear(void *x) #if USE_SPLIT_PTE_PTLOCKS #if ALLOC_SPLIT_PTLOCKS void __init ptlock_cache_init(void); -extern bool ptlock_alloc(struct page *page); +bool ptlock_alloc(struct ptdesc *ptdesc); extern void ptlock_free(struct page *page); static inline spinlock_t *ptlock_ptr(struct page *page) @@ -2837,7 +2837,7 @@ static inline void ptlock_cache_init(void) { } -static inline bool ptlock_alloc(struct page *page) +static inline bool ptlock_alloc(struct ptdesc *ptdesc) { return true; } @@ -2867,7 +2867,7 @@ static inline bool ptlock_init(struct page *page) * slab code uses page->slab_cache, which share storage with page->ptl. */ VM_BUG_ON_PAGE(*(unsigned long *)&page->ptl, page); - if (!ptlock_alloc(page)) + if (!ptlock_alloc(page_ptdesc(page))) return false; spin_lock_init(ptlock_ptr(page)); return true; diff --git a/mm/memory.c b/mm/memory.c index 80ce9dda2779..ba9579117686 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -5934,14 +5934,14 @@ void __init ptlock_cache_init(void) SLAB_PANIC, NULL); } -bool ptlock_alloc(struct page *page) +bool ptlock_alloc(struct ptdesc *ptdesc) { spinlock_t *ptl; ptl = kmem_cache_alloc(page_ptl_cachep, GFP_KERNEL); if (!ptl) return false; - page->ptl = ptl; + ptdesc->ptl = ptl; return true; } -- 2.40.1