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(p200300d82f4e3200c99da38b3f3ad4b3.dip0.t-ipconnect.de. [2003:d8:2f4e:3200:c99d:a38b:3f3a:d4b3]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-475c4369b5esm130845595e9.15.2025.10.23.12.37.43 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Thu, 23 Oct 2025 12:37:44 -0700 (PDT) Message-ID: Date: Thu, 23 Oct 2025 21:37:42 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 04/13] sparc/mm: implement arch_flush_lazy_mmu_mode() To: Kevin Brodsky , linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, Alexander Gordeev , Andreas Larsson , Andrew Morton , Boris Ostrovsky , Borislav Petkov , Catalin Marinas , Christophe Leroy , Dave Hansen , "David S. Miller" , "H. Peter Anvin" , Ingo Molnar , Jann Horn , Juergen Gross , "Liam R. Howlett" , Lorenzo Stoakes , Madhavan Srinivasan , Michael Ellerman , Michal Hocko , Mike Rapoport , Nicholas Piggin , Peter Zijlstra , Ryan Roberts , Suren Baghdasaryan , Thomas Gleixner , Vlastimil Babka , Will Deacon , Yeoreum Yun , linux-arm-kernel@lists.infradead.org, linuxppc-dev@lists.ozlabs.org, sparclinux@vger.kernel.org, xen-devel@lists.xenproject.org, x86@kernel.org References: <20251015082727.2395128-1-kevin.brodsky@arm.com> <20251015082727.2395128-5-kevin.brodsky@arm.com> From: David Hildenbrand Autocrypt: addr=david@redhat.com; keydata= xsFNBFXLn5EBEAC+zYvAFJxCBY9Tr1xZgcESmxVNI/0ffzE/ZQOiHJl6mGkmA1R7/uUpiCjJ dBrn+lhhOYjjNefFQou6478faXE6o2AhmebqT4KiQoUQFV4R7y1KMEKoSyy8hQaK1umALTdL QZLQMzNE74ap+GDK0wnacPQFpcG1AE9RMq3aeErY5tujekBS32jfC/7AnH7I0v1v1TbbK3Gp XNeiN4QroO+5qaSr0ID2sz5jtBLRb15RMre27E1ImpaIv2Jw8NJgW0k/D1RyKCwaTsgRdwuK Kx/Y91XuSBdz0uOyU/S8kM1+ag0wvsGlpBVxRR/xw/E8M7TEwuCZQArqqTCmkG6HGcXFT0V9 PXFNNgV5jXMQRwU0O/ztJIQqsE5LsUomE//bLwzj9IVsaQpKDqW6TAPjcdBDPLHvriq7kGjt WhVhdl0qEYB8lkBEU7V2Yb+SYhmhpDrti9Fq1EsmhiHSkxJcGREoMK/63r9WLZYI3+4W2rAc UucZa4OT27U5ZISjNg3Ev0rxU5UH2/pT4wJCfxwocmqaRr6UYmrtZmND89X0KigoFD/XSeVv jwBRNjPAubK9/k5NoRrYqztM9W6sJqrH8+UWZ1Idd/DdmogJh0gNC0+N42Za9yBRURfIdKSb B3JfpUqcWwE7vUaYrHG1nw54pLUoPG6sAA7Mehl3nd4pZUALHwARAQABzSREYXZpZCBIaWxk ZW5icmFuZCA8ZGF2aWRAcmVkaGF0LmNvbT7CwZoEEwEIAEQCGwMCF4ACGQEFCwkIBwICIgIG FQoJCAsCBBYCAwECHgcWIQQb2cqtc1xMOkYN/MpN3hD3AP+DWgUCaJzangUJJlgIpAAKCRBN 3hD3AP+DWhAxD/9wcL0A+2rtaAmutaKTfxhTP0b4AAp1r/eLxjrbfbCCmh4pqzBhmSX/4z11 opn2KqcOsueRF1t2ENLOWzQu3Roiny2HOU7DajqB4dm1BVMaXQya5ae2ghzlJN9SIoopTWlR 0Af3hPj5E2PYvQhlcqeoehKlBo9rROJv/rjmr2x0yOM8qeTroH/ZzNlCtJ56AsE6Tvl+r7cW 3x7/Jq5WvWeudKrhFh7/yQ7eRvHCjd9bBrZTlgAfiHmX9AnCCPRPpNGNedV9Yty2Jnxhfmbv Pw37LA/jef8zlCDyUh2KCU1xVEOWqg15o1RtTyGV1nXV2O/mfuQJud5vIgzBvHhypc3p6VZJ lEf8YmT+Ol5P7SfCs5/uGdWUYQEMqOlg6w9R4Pe8d+mk8KGvfE9/zTwGg0nRgKqlQXrWRERv cuEwQbridlPAoQHrFWtwpgYMXx2TaZ3sihcIPo9uU5eBs0rf4mOERY75SK+Ekayv2ucTfjxr Kf014py2aoRJHuvy85ee/zIyLmve5hngZTTe3Wg3TInT9UTFzTPhItam6dZ1xqdTGHZYGU0O otRHcwLGt470grdiob6PfVTXoHlBvkWRadMhSuG4RORCDpq89vu5QralFNIf3EysNohoFy2A LYg2/D53xbU/aa4DDzBb5b1Rkg/udO1gZocVQWrDh6I2K3+cCs7BTQRVy5+RARAA59fefSDR 9nMGCb9LbMX+TFAoIQo/wgP5XPyzLYakO+94GrgfZjfhdaxPXMsl2+o8jhp/hlIzG56taNdt VZtPp3ih1AgbR8rHgXw1xwOpuAd5lE1qNd54ndHuADO9a9A0vPimIes78Hi1/yy+ZEEvRkHk /kDa6F3AtTc1m4rbbOk2fiKzzsE9YXweFjQvl9p+AMw6qd/iC4lUk9g0+FQXNdRs+o4o6Qvy iOQJfGQ4UcBuOy1IrkJrd8qq5jet1fcM2j4QvsW8CLDWZS1L7kZ5gT5EycMKxUWb8LuRjxzZ 3QY1aQH2kkzn6acigU3HLtgFyV1gBNV44ehjgvJpRY2cC8VhanTx0dZ9mj1YKIky5N+C0f21 zvntBqcxV0+3p8MrxRRcgEtDZNav+xAoT3G0W4SahAaUTWXpsZoOecwtxi74CyneQNPTDjNg azHmvpdBVEfj7k3p4dmJp5i0U66Onmf6mMFpArvBRSMOKU9DlAzMi4IvhiNWjKVaIE2Se9BY FdKVAJaZq85P2y20ZBd08ILnKcj7XKZkLU5FkoA0udEBvQ0f9QLNyyy3DZMCQWcwRuj1m73D sq8DEFBdZ5eEkj1dCyx+t/ga6x2rHyc8Sl86oK1tvAkwBNsfKou3v+jP/l14a7DGBvrmlYjO 59o3t6inu6H7pt7OL6u6BQj7DoMAEQEAAcLBfAQYAQgAJgIbDBYhBBvZyq1zXEw6Rg38yk3e EPcA/4NaBQJonNqrBQkmWAihAAoJEE3eEPcA/4NaKtMQALAJ8PzprBEXbXcEXwDKQu+P/vts IfUb1UNMfMV76BicGa5NCZnJNQASDP/+bFg6O3gx5NbhHHPeaWz/VxlOmYHokHodOvtL0WCC 8A5PEP8tOk6029Z+J+xUcMrJClNVFpzVvOpb1lCbhjwAV465Hy+NUSbbUiRxdzNQtLtgZzOV Zw7jxUCs4UUZLQTCuBpFgb15bBxYZ/BL9MbzxPxvfUQIPbnzQMcqtpUs21CMK2PdfCh5c4gS sDci6D5/ZIBw94UQWmGpM/O1ilGXde2ZzzGYl64glmccD8e87OnEgKnH3FbnJnT4iJchtSvx yJNi1+t0+qDti4m88+/9IuPqCKb6Stl+s2dnLtJNrjXBGJtsQG/sRpqsJz5x1/2nPJSRMsx9 5YfqbdrJSOFXDzZ8/r82HgQEtUvlSXNaXCa95ez0UkOG7+bDm2b3s0XahBQeLVCH0mw3RAQg r7xDAYKIrAwfHHmMTnBQDPJwVqxJjVNr7yBic4yfzVWGCGNE4DnOW0vcIeoyhy9vnIa3w1uZ 3iyY2Nsd7JxfKu1PRhCGwXzRw5TlfEsoRI7V9A8isUCoqE2Dzh3FvYHVeX4Us+bRL/oqareJ CIFqgYMyvHj7Q06kTKmauOe4Nf0l0qEkIuIzfoLJ3qr5UyXc2hLtWyT9Ir+lYlX9efqh7mOY qIws/H2t In-Reply-To: <20251015082727.2395128-5-kevin.brodsky@arm.com> X-Mimecast-Spam-Score: 0 X-Mimecast-MFC-PROC-ID: qPvrW_osctg9sxli0rQM1pTedp627BnwpzhUQDrkDzs_1761248265 X-Mimecast-Originator: redhat.com Content-Language: en-US Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Rspam-User: X-Rspamd-Queue-Id: 8E1BF1A000D X-Rspamd-Server: rspam03 X-Stat-Signature: n4mk9azzrwefywkdjboz757oywfjy4yp X-HE-Tag: 1761248268-443157 X-HE-Meta: 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 VFMqx7WS 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 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: List-Subscribe: List-Unsubscribe: On 15.10.25 10:27, Kevin Brodsky wrote: > Upcoming changes to the lazy_mmu API will cause > arch_flush_lazy_mmu_mode() to be called when leaving a nested > lazy_mmu section. > > Move the relevant logic from arch_leave_lazy_mmu_mode() to > arch_flush_lazy_mmu_mode() and have the former call the latter. > > Signed-off-by: Kevin Brodsky > --- > arch/sparc/include/asm/tlbflush_64.h | 2 +- > arch/sparc/mm/tlb.c | 9 ++++++++- > 2 files changed, 9 insertions(+), 2 deletions(-) > > diff --git a/arch/sparc/include/asm/tlbflush_64.h b/arch/sparc/include/asm/tlbflush_64.h > index 8b8cdaa69272..925bb5d7a4e1 100644 > --- a/arch/sparc/include/asm/tlbflush_64.h > +++ b/arch/sparc/include/asm/tlbflush_64.h > @@ -43,8 +43,8 @@ void flush_tlb_kernel_range(unsigned long start, unsigned long end); > > void flush_tlb_pending(void); > void arch_enter_lazy_mmu_mode(void); > +void arch_flush_lazy_mmu_mode(void); > void arch_leave_lazy_mmu_mode(void); > -#define arch_flush_lazy_mmu_mode() do {} while (0) > > /* Local cpu only. */ > void __flush_tlb_all(void); > diff --git a/arch/sparc/mm/tlb.c b/arch/sparc/mm/tlb.c > index a35ddcca5e76..7b5dfcdb1243 100644 > --- a/arch/sparc/mm/tlb.c > +++ b/arch/sparc/mm/tlb.c > @@ -59,12 +59,19 @@ void arch_enter_lazy_mmu_mode(void) > tb->active = 1; > } > > -void arch_leave_lazy_mmu_mode(void) > +void arch_flush_lazy_mmu_mode(void) > { > struct tlb_batch *tb = this_cpu_ptr(&tlb_batch); > > if (tb->tlb_nr) > flush_tlb_pending(); > +} > + > +void arch_leave_lazy_mmu_mode(void) > +{ > + struct tlb_batch *tb = this_cpu_ptr(&tlb_batch); > + Just like for ppc now a double this_cpu_ptr(). I'd similarly just replicate the two statements. > + arch_flush_lazy_mmu_mode(); > tb->active = 0; > preempt_enable(); > } -- Cheers David / dhildenb