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Thu, 12 Jan 2023 07:53:40 -0800 (PST) Received: from vultr.guest ([173.199.122.241]) by smtp.gmail.com with ESMTPSA id l17-20020ac848d1000000b003ab43dabfb1sm9280836qtr.55.2023.01.12.07.53.38 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 12 Jan 2023 07:53:39 -0800 (PST) From: Yafang Shao To: 42.hyeyoo@gmail.com, vbabka@suse.cz, ast@kernel.org, daniel@iogearbox.net, andrii@kernel.org, kafai@fb.com, songliubraving@fb.com, yhs@fb.com, john.fastabend@gmail.com, kpsingh@kernel.org, sdf@google.com, haoluo@google.com, jolsa@kernel.org, tj@kernel.org, dennis@kernel.org, cl@linux.com, akpm@linux-foundation.org, penberg@kernel.org, rientjes@google.com, iamjoonsoo.kim@lge.com, roman.gushchin@linux.dev Cc: linux-mm@kvack.org, bpf@vger.kernel.org, Yafang Shao Subject: [RFC PATCH bpf-next v2 05/11] mm: vmalloc: introduce vsize() Date: Thu, 12 Jan 2023 15:53:20 +0000 Message-Id: <20230112155326.26902-6-laoar.shao@gmail.com> X-Mailer: git-send-email 2.31.1 In-Reply-To: <20230112155326.26902-1-laoar.shao@gmail.com> References: <20230112155326.26902-1-laoar.shao@gmail.com> MIME-Version: 1.0 X-Rspam-User: X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 6197A2001A X-Stat-Signature: 47q8fkbkbm8kr9toxt7x5zzpqnfuamo7 X-HE-Tag: 1673539208-866253 X-HE-Meta: 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 BXs2PHfT mTi3XOdskMJERTF7Dxp2ESVlJA9ATO8vArFus7O0O3k6qEnhNGAMKNht24vB1CYjn1rRgBZxdD5mNJ9I4THQ8pyvQSP3LgGzozrBDAL+acIe/Mo2IF32AqpfWyScKKoGndilRvqjufVNOBY4j9/vP8TMgP+fr0D0Lk0UyeV/hoBIwcam9BiAKvICBD2ruqNA1a1nBYr6JVy/8uQnuBCW2731kThNgdljPlCVX0lCyCQopF2o= 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: Introduce a helper to report full size of underlying allocation of a vmalloc'ed address. Signed-off-by: Yafang Shao --- include/linux/vmalloc.h | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 096d48a..52f925f 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -297,4 +297,19 @@ struct vm_struct **pcpu_get_vm_areas(const unsigned long *offsets, static inline bool vmalloc_dump_obj(void *object) { return false; } #endif +/* Report full size of underlying allocation of a vmalloc'ed addr */ +static inline size_t vsize(const void *addr) +{ + struct vm_struct *area; + + if (!addr) + return 0; + + area = find_vm_area(addr); + if (unlikely(!area)) + return 0; + + return area->size; +} + #endif /* _LINUX_VMALLOC_H */