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Tue, 01 Nov 2022 12:41:54 +0000 Received: from hirez.programming.kicks-ass.net (hirez.programming.kicks-ass.net [192.168.1.225]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) by noisy.programming.kicks-ass.net (Postfix) with ESMTPS id 9783930007E; Tue, 1 Nov 2022 13:41:52 +0100 (CET) Received: by hirez.programming.kicks-ass.net (Postfix, from userid 1000) id 7ABD22C83EAF2; Tue, 1 Nov 2022 13:41:52 +0100 (CET) Date: Tue, 1 Nov 2022 13:41:52 +0100 From: Peter Zijlstra To: Linus Torvalds Cc: x86@kernel.org, willy@infradead.org, akpm@linux-foundation.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, aarcange@redhat.com, kirill.shutemov@linux.intel.com, jroedel@suse.de, ubizjak@gmail.com Subject: Re: [PATCH 04/13] mm: Fix pmd_read_atomic() Message-ID: References: <20221022111403.531902164@infradead.org> <20221022114424.711181252@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: ARC-Authentication-Results: i=1; imf29.hostedemail.com; dkim=pass header.d=infradead.org header.s=desiato.20200630 header.b=GiogJX40; spf=none (imf29.hostedemail.com: domain of peterz@infradead.org has no SPF policy when checking 90.155.92.199) smtp.mailfrom=peterz@infradead.org; dmarc=none ARC-Seal: i=1; s=arc-20220608; d=hostedemail.com; t=1667306522; a=rsa-sha256; cv=none; b=rVYW366z3Wg4yZmAo6y5fId5zI7RdJkDOWsEFJz29YPUXRMOMjHwtunjrhgCWwnGZzLxXM ss9EESJBUh43CkUBAIl7A054GhL3svfx0C2WxKKEfg8KkoxPGZe8LpeMajcq1LS1r/WCDu R/mc/rYjJ2qtYouflYl+DyAKj9Yl/es= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=hostedemail.com; s=arc-20220608; t=1667306522; h=from:from:sender:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type:content-transfer-encoding: in-reply-to:in-reply-to:references:references:dkim-signature; bh=tsiePMENPo20/Aqx0vlDxCvA4WW1WHFkPzpPxVXbJzs=; b=38Zr25kEXfn+7tGQYCo5nsPymE+wZCioiWdHgHgtEOqEC67GB6sk8egNBwY5CuCy79eolq Kb7fCIfBICqXmA74KzaN84iTIWn7/ob7HBDmSqcGgIoCpgAvy8fs2fEu37bAtd+e8oswaW yvZ7f3briELlDWbpSGX9al6vhEbMrik= X-Rspam-User: Authentication-Results: imf29.hostedemail.com; dkim=pass header.d=infradead.org header.s=desiato.20200630 header.b=GiogJX40; spf=none (imf29.hostedemail.com: domain of peterz@infradead.org has no SPF policy when checking 90.155.92.199) smtp.mailfrom=peterz@infradead.org; dmarc=none X-Rspamd-Server: rspam07 X-Stat-Signature: wf5w3angbrmc9rywgat37szduzgcawaz X-Rspamd-Queue-Id: 0F15F120040 X-HE-Tag: 1667306520-188749 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: On Sat, Oct 22, 2022 at 10:30:51AM -0700, Linus Torvalds wrote: > On Sat, Oct 22, 2022 at 4:48 AM Peter Zijlstra wrote: > > > > --- a/include/linux/pgtable.h > > +++ b/include/linux/pgtable.h > > @@ -258,6 +258,13 @@ static inline pte_t ptep_get(pte_t *ptep > > } > > #endif > > > > +#ifndef __HAVE_ARCH_PMDP_GET > > +static inline pmd_t pmdp_get(pmd_t *pmdp) > > +{ > > + return READ_ONCE(*pmdp); > > +} > > +#endif > > What, what, what? > > Where did that __HAVE_ARCH_PMDP_GET come from? > > I'm not seeing it #define'd anywhere, and we _really_ shouldn't be > doing this any more. > > Please just do > > #ifndef pmdp_get > static inline pmd_t pmdp_get(pmd_t *pmdp) > .. > > and have the architectures that do their own pmdp_get(), just have that > > #define pmdp_get pmdp_get > > to let the generic code know about it. Instead of making up a new > __HAVE_ARCH_XYZ name. So I've stuck the below on. There's a *TON* more to convert and I'm not going to be doing that just now (seems like a clever enough script should be able to), but this gets rid of the new one I introduced. --- Subject: mm: Convert __HAVE_ARCH_P..P_GET to the new style From: Peter Zijlstra Date: Tue Nov 1 12:53:18 CET 2022 Since __HAVE_ARCH_* style guards have been depricated in favour of defining the function name onto itself, convert pxxp_get(). Suggested-by: Linus Torvalds Signed-off-by: Peter Zijlstra (Intel) --- arch/powerpc/include/asm/nohash/32/pgtable.h | 2 +- include/linux/pgtable.h | 4 ++-- 2 files changed, 3 insertions(+), 3 deletions(-) --- a/arch/powerpc/include/asm/nohash/32/pgtable.h +++ b/arch/powerpc/include/asm/nohash/32/pgtable.h @@ -263,7 +263,7 @@ static inline pte_basic_t pte_update(str } #ifdef CONFIG_PPC_16K_PAGES -#define __HAVE_ARCH_PTEP_GET +#define ptep_get ptep_get static inline pte_t ptep_get(pte_t *ptep) { pte_basic_t val = READ_ONCE(ptep->pte); --- a/include/linux/pgtable.h +++ b/include/linux/pgtable.h @@ -291,14 +291,14 @@ static inline void ptep_clear(struct mm_ ptep_get_and_clear(mm, addr, ptep); } -#ifndef __HAVE_ARCH_PTEP_GET +#ifndef ptep_get static inline pte_t ptep_get(pte_t *ptep) { return READ_ONCE(*ptep); } #endif -#ifndef __HAVE_ARCH_PMDP_GET +#ifndef pmdp_get static inline pmd_t pmdp_get(pmd_t *pmdp) { return READ_ONCE(*pmdp);