From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 9755F2BFC70 for ; Thu, 15 Jan 2026 23:48:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768520935; cv=none; b=UIKySpI061jnwTUjDRbPfhMHz8o2vjbDqOchFZd8Lpa0imCrobeizlMM/LY39nmQWK4J/SDXlZ3drTAi2leJbvNaL6VxSX8MzJZJ3JUVqH8L9MWtgi2YH1Jm+3pXrPkFFdVbYIWB0BeDulLMCWcP/nQpFYJYmJlfOqEKZj062nU= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768520935; c=relaxed/simple; bh=oefMjdZp2nJz+Tj6t5nbIdKYyCTyxQCLpbveopuW1V0=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=l/ZYyapffWJ0/jHu56CbqF3/5W01Kpul548noNwq/SSZQPYhjk/O4h2JFBkfnLEJhJn029Xh7nL3c0hMnmjFWRLG3KV3S95mktsDXjAM5ITg/XbCXTcvWbAiRk923L3Cf6NPUX3jLs2j7Rtc/gqsps2mi+LDC27OIpsV32CDuYk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=ZbCPxLlG; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="ZbCPxLlG" Received: by smtp.kernel.org (Postfix) with ESMTPSA id BD4F8C116D0; Thu, 15 Jan 2026 23:48:51 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1768520935; bh=oefMjdZp2nJz+Tj6t5nbIdKYyCTyxQCLpbveopuW1V0=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=ZbCPxLlGHoMFQzvGaL0M4b8GbuIoUlw34aS6YQLA8O5/g5ke3cbKf73kW3L7pOu+3 CFhF8AoDGosJI3YPdXzg3OH8OZJ12FHN9l6dE/lGrB2+VzwSetCMHlhuc9D2A0NFs6 9wo80t8vDKSuRyPimsBnVsvgZS/4V/6LmSFqKvx82RbiFJ2WsHuSpRNALKkQ4IWsbP uqsef/OreqOhElre28p8xFG1+JxodqKT9mIZpLazLGQDU5MxTdxUtXy9nkQtzEAJ+G SvAfisWQiEwCphYpnT7d7qvboqJOmggD16rGnFzIs3teTpRfmxoWYViLu40Snp1BI3 JhqrEyFPUtx3Q== Message-ID: <719f9bcd-0990-48e7-bf3b-929417a13db5@kernel.org> Date: Fri, 16 Jan 2026 00:48:48 +0100 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH V2 3/5] mm/khugepaged: change collapse_pte_mapped_thp() to return void To: Shivank Garg , Andrew Morton , Lorenzo Stoakes Cc: Zi Yan , Baolin Wang , "Liam R . Howlett" , Nico Pache , Ryan Roberts , Dev Jain , Barry Song , Lance Yang , linux-mm@kvack.org, linux-kernel@vger.kernel.org References: <20251224111351.41042-4-shivankg@amd.com> <20251224111351.41042-10-shivankg@amd.com> From: "David Hildenbrand (Red Hat)" Content-Language: en-US Autocrypt: addr=david@kernel.org; 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 ZW5icmFuZCA8ZGF2aWRAa2VybmVsLm9yZz7CwY0EEwEIADcWIQQb2cqtc1xMOkYN/MpN3hD3 AP+DWgUCaKYhwAIbAwUJJlgIpAILCQQVCgkIAhYCAh4FAheAAAoJEE3eEPcA/4Naa5EP/3a1 9sgS9m7oiR0uenlj+C6kkIKlpWKRfGH/WvtFaHr/y06TKnWn6cMOZzJQ+8S39GOteyCCGADh 6ceBx1KPf6/AvMktnGETDTqZ0N9roR4/aEPSMt8kHu/GKR3gtPwzfosX2NgqXNmA7ErU4puf zica1DAmTvx44LOYjvBV24JQG99bZ5Bm2gTDjGXV15/X159CpS6Tc2e3KvYfnfRvezD+alhF XIym8OvvGMeo97BCHpX88pHVIfBg2g2JogR6f0PAJtHGYz6M/9YMxyUShJfo0Df1SOMAbU1Q Op0Ij4PlFCC64rovjH38ly0xfRZH37DZs6kP0jOj4QdExdaXcTILKJFIB3wWXWsqLbtJVgjR YhOrPokd6mDA3gAque7481KkpKM4JraOEELg8pF6eRb3KcAwPRekvf/nYVIbOVyT9lXD5mJn IZUY0LwZsFN0YhGhQJ8xronZy0A59faGBMuVnVb3oy2S0fO1y/r53IeUDTF1wCYF+fM5zo14 5L8mE1GsDJ7FNLj5eSDu/qdZIKqzfY0/l0SAUAAt5yYYejKuii4kfTyLDF/j4LyYZD1QzxLC MjQl36IEcmDTMznLf0/JvCHlxTYZsF0OjWWj1ATRMk41/Q+PX07XQlRCRcE13a8neEz3F6we 08oWh2DnC4AXKbP+kuD9ZP6+5+x1H1zEzsFNBFXLn5EBEADn1959INH2cwYJv0tsxf5MUCgh Cj/CA/lc/LMthqQ773gauB9mN+F1rE9cyyXb6jyOGn+GUjMbnq1o121Vm0+neKHUCBtHyseB fDXHA6m4B3mUTWo13nid0e4AM71r0DS8+KYh6zvweLX/LL5kQS9GQeT+QNroXcC1NzWbitts 6TZ+IrPOwT1hfB4WNC+X2n4AzDqp3+ILiVST2DT4VBc11Gz6jijpC/KI5Al8ZDhRwG47LUiu Qmt3yqrmN63V9wzaPhC+xbwIsNZlLUvuRnmBPkTJwwrFRZvwu5GPHNndBjVpAfaSTOfppyKB Tccu2AXJXWAE1Xjh6GOC8mlFjZwLxWFqdPHR1n2aPVgoiTLk34LR/bXO+e0GpzFXT7enwyvF FFyAS0Nk1q/7EChPcbRbhJqEBpRNZemxmg55zC3GLvgLKd5A09MOM2BrMea+l0FUR+PuTenh 2YmnmLRTro6eZ/qYwWkCu8FFIw4pT0OUDMyLgi+GI1aMpVogTZJ70FgV0pUAlpmrzk/bLbRk F3TwgucpyPtcpmQtTkWSgDS50QG9DR/1As3LLLcNkwJBZzBG6PWbvcOyrwMQUF1nl4SSPV0L LH63+BrrHasfJzxKXzqgrW28CTAE2x8qi7e/6M/+XXhrsMYG+uaViM7n2je3qKe7ofum3s4v q7oFCPsOgwARAQABwsF8BBgBCAAmAhsMFiEEG9nKrXNcTDpGDfzKTd4Q9wD/g1oFAmic2qsF CSZYCKEACgkQTd4Q9wD/g1oq0xAAsAnw/OmsERdtdwRfAMpC74/++2wh9RvVQ0x8xXvoGJwZ rk0Jmck1ABIM//5sWDo7eDHk1uEcc95pbP9XGU6ZgeiQeh06+0vRYILwDk8Q/y06TrTb1n4n 7FRwyskKU1UWnNW86lvWUJuGPABXjrkfL41RJttSJHF3M1C0u2BnM5VnDuPFQKzhRRktBMK4 GkWBvXlsHFhn8Ev0xvPE/G99RAg9ufNAxyq2lSzbUIwrY918KHlziBKwNyLoPn9kgHD3hRBa Yakz87WKUZd17ZnPMZiXriCWZxwPx7zs6cSAqcfcVucmdPiIlyG1K/HIk2LX63T6oO2Libzz 7/0i4+oIpvpK2X6zZ2cu0k2uNcEYm2xAb+xGmqwnPnHX/ac8lJEyzH3lh+pt2slI4VcPNnz+ vzYeBAS1S+VJc1pcJr3l7PRSQ4bv5sObZvezRdqEFB4tUIfSbDdEBCCvvEMBgoisDB8ceYxO cFAM8nBWrEmNU2vvIGJzjJ/NVYYIY0TgOc5bS9wh6jKHL2+chrfDW5neLJjY2x3snF8q7U9G EIbBfNHDlOV8SyhEjtX0DyKxQKioTYPOHcW9gdV5fhSz5tEv+ipqt4kIgWqBgzK8ePtDTqRM qZq457g1/SXSoSQi4jN+gsneqvlTJdzaEu1bJP0iv6ViVf15+qHuY5iojCz8fa0= In-Reply-To: <20251224111351.41042-10-shivankg@amd.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 12/24/25 12:13, Shivank Garg wrote: > The only external caller of collapse_pte_mapped_thp() is uprobe, which > ignores the return value. Change the external API to return void to > simplify the interface. > > Introduce try_collapse_pte_mapped_thp() for internal use that preserves > the return value. This prepares for future patch that will convert > the return type to use enum scan_result. > > Suggested-by: David Hildenbrand (Red Hat) > Signed-off-by: Shivank Garg > --- > include/linux/khugepaged.h | 9 ++++----- > mm/khugepaged.c | 40 ++++++++++++++++++++++---------------- > 2 files changed, 27 insertions(+), 22 deletions(-) > > diff --git a/include/linux/khugepaged.h b/include/linux/khugepaged.h > index eb1946a70cff..37b992b22bba 100644 > --- a/include/linux/khugepaged.h > +++ b/include/linux/khugepaged.h > @@ -17,8 +17,8 @@ extern void khugepaged_enter_vma(struct vm_area_struct *vma, > vm_flags_t vm_flags); > extern void khugepaged_min_free_kbytes_update(void); > extern bool current_is_khugepaged(void); > -extern int collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr, > - bool install_pmd); > +extern void collapse_pte_mapped_thp(struct mm_struct *mm, unsigned long addr, > + bool install_pmd); Sorry for late review. We remove the "extern" whenever we touch functions. Nit: two tab indent on second parameter line. Same applies for the other code you touch below (if you already adjust that line, just indent with two tabs). Acked-by: David Hildenbrand (Red Hat) -- Cheers David