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From: Shakeel Butt To: Guopeng Zhang Cc: Andrew Morton , Johannes Weiner , Michal Hocko , Roman Gushchin , Muchun Song , cgroups@vger.kernel.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org, Guopeng Zhang Subject: Re: [PATCH] mm: memcg-v1: make mem_cgroup_oom_notify_cb() return void Message-ID: References: <20260713093737.3299646-1-guopeng.zhang@linux.dev> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260713093737.3299646-1-guopeng.zhang@linux.dev> X-Migadu-Flow: FLOW_OUT X-Rspam-User: X-Rspamd-Server: rspam02 X-Rspamd-Queue-Id: E7D67180011 X-Stat-Signature: 97fsxo5sjesb4zkpkd11jy4w79qcnxqy X-HE-Tag: 1784059623-244011 X-HE-Meta: U2FsdGVkX1+hyHI+On+TqevIi0KDEoarTFmNVKHx1uScxQ6euf14SKtbaTYfVUY6GmzjVwLmRHWotIblWnL/fh+o6aTNvSEp0fvpMcYRNKoszxEQKdo4pcpKIUB6l2STp3pZLf3h2mku4yL5YTjybf9aCNZwBgOYcYoVj9gXCNboeZ4zI7en4opY5ZWa5PmoFXavyWn0tDe5VpFdexzDwmhqII7ecPJxklQkbQGHLakh0MUcTKN4unMZl9SX6eD5xzxwkY1imKVsQbWpzLxpTLaWAAa9mA52pbGSqRxbHfJMlIDhH28vdZl8BmTeV61x2zVECN6S00N2XKj9eTtN5/3tC97w6ukcHiQt1wCQ4pBLq0NrR3cfArblWxzIWmZ4WdWzsLyGgvl+fsbWRleVSB4eyy3DPrudKpp6t8zcXEhSkt3HzZ0uWnQWkb+yC+EjhKPxGB5e+eBeR7+yxkqAVGqaCoxWl6PskXutUz6SayY0DjZUkdR4nIqeixUeEWS5/R5uPEw3+gZylKg6hmw89+QAfULwxZ1ZxwCsNL3Cb2tCJmwb6EC3QLLAY2PgTXSy5o1xtK4+u6mlLHTDZmpL682oT4b4mBp3v3aVOHzISy6GHKIQTstLKfrfRCnSAiqu4YjM6vKQ8L13x9sqeu34Jeu8SZgRJ+7KfwmOeIsHqfWY5ucR7SeubF4BFv/UIU69aKIT7vGiQV6YswUuy/38l6JBCsptONLS6khQWapX7SZDodrWGkgbeQNOq+Y6BqcKVEnV9OGhRlRvlX4nR206Ye6359LYhH9lRrWeRTVqqHG76IQoez/2LpEw9bRzfs6Lt0VglnjD7pIDQrJ2HX1YXdvWdx4LK6tj1+5nbshAQ0dthtFiKcbkO+A2MZ/ZogcRtxFede/JRFd1D6co0IFojt9JJECfnjUehPFnTOaO4RPIdUFReVZU272Sa3CrqgC4d8TkUddwvL1ER1/3x6I mSIqPVP7 zlhUV34ad3EVGrMbPEpt30uqLetxoaPPCOCPkP/d77QpXu+tl7OhLR2br1gzgb0vCsmaHBGnUs2PGDZhMDVVzkvTFyIZSsB56qXGEIfaeoxXSpoUWwO1WK2eGnqYXINeFseI12KdXsCt5WgRPIkEWxlc9ac15O3XkLmztrEPYfTm4qE7zqHiK6rD86k9pdU8QjtGG1rpJsmM26qInQf5sh3WYjKQ4QFq/NAQxH7f9NfBvIzVG2QScaTd5EQhHwdw4LGUZ Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Mon, Jul 13, 2026 at 05:37:37PM +0800, Guopeng Zhang wrote: > From: Guopeng Zhang > > Commit 7d74b06f240f ("memcg: use for_each_mem_cgroup") replaced the > mem_cgroup_walk_tree() call in mem_cgroup_oom_notify() with > for_each_mem_cgroup_tree(), but left mem_cgroup_oom_notify_cb() with the > int return type required by the old callback interface. > > The function now has a single direct caller and no failure path. Make it > return void. > > Signed-off-by: Guopeng Zhang Acked-by: Shakeel Butt