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Tue, 3 Sep 2024 06:27:19 +0000 (GMT) From: Sven Schnelle To: Linus Torvalds Cc: Andrew Morton , Nathan Chancellor , Michael Ellerman , linux-mm@kvack.org, linuxppc-dev@lists.ozlabs.org, christophe.leroy@csgroup.eu, jeffxu@google.com, Liam.Howlett@oracle.com, linux-kernel@vger.kernel.org, npiggin@gmail.com, oliver.sang@intel.com, pedro.falcato@gmail.com, linux-um@lists.infradead.org, linux-s390@vger.kernel.org, Ravi Bangoria , Steven Rostedt Subject: Re: [PATCH v2 1/4] mm: Add optional close() to struct vm_special_mapping In-Reply-To: (Linus Torvalds's message of "Mon, 2 Sep 2024 14:02:56 -0700") References: <20240812082605.743814-1-mpe@ellerman.id.au> <20240819185253.GA2333884@thelio-3990X> <20240902134953.e834bc2e57d36b1d3b1397e4@linux-foundation.org> Date: Tue, 03 Sep 2024 08:27:19 +0200 Message-ID: User-Agent: Gnus/5.13 (Gnus v5.13) X-Mailing-List: linuxppc-dev@lists.ozlabs.org List-Id: List-Help: List-Post: List-Subscribe: , , List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain X-TM-AS-GCONF: 00 X-Proofpoint-GUID: 9aSqu6fFfWss73YgKp0gBlzFQVIXapXn X-Proofpoint-ORIG-GUID: OxhEA4e_rV3dfcm0C7DWi8uVqyGWdHzl X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1039,Hydra:6.0.680,FMLib:17.12.60.29 definitions=2024-09-02_06,2024-09-02_01,2024-09-02_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 lowpriorityscore=0 clxscore=1011 mlxscore=0 impostorscore=0 malwarescore=0 suspectscore=0 priorityscore=1501 adultscore=0 mlxlogscore=970 bulkscore=0 spamscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.19.0-2407110000 definitions=main-2409030046 Linus Torvalds writes: > On Mon, 2 Sept 2024 at 13:49, Andrew Morton wrote: >> >> uprobe_clear_state() is a pretty simple low-level thing. Side-effects >> seem unlikely? > > I think uprobe_clear_state() should be removed from fork.c entirely, > made 'static', and then we'd have > > area->xol_mapping.close = uprobe_clear_state; > > in __create_xol_area() instead (ok, the arguments change, instead of > looking up "mm->uprobes_state.xol_area", it would get it as the vma > argument) > > That's how it should always have been, except we didn't have a close() function. > > Hmm? Indeed, that's much better. I'll prepare a patch. Thanks!