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X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?us-ascii?Q?BLJASHxLHegHUO1hzR/oUw+O88npuXAXKot2YkS5HG/P8CLHXk86ACJ7Up9h?= =?us-ascii?Q?A5J0EoPbIUeOW1TT2NW1an2pzjmO9ecWCWi0OTZap6kfPvM2hgiKReA3oIUc?= =?us-ascii?Q?uL3NdGO0nTbX6m1gybEoVaH6NXzKJG73AdL0oTl9wdXWSv2xPKIK5P1q/Sqw?= =?us-ascii?Q?iNjWeRveZ7URAS5DF89ZUhZbboN/UBuGNktOMD33dQYTtaev6WTnvTwxJjBB?= =?us-ascii?Q?GZPHCnjt+TDmQTCzmjzic7yxoxa5pzQU8w5GZA/K65f+TMTRpULxhjlIIds6?= =?us-ascii?Q?G3opvbjajjNERvZS5ZVlZ6UHjevAvToFo3gsz7rMFltgw5OHBuW4MN6SkA6s?= =?us-ascii?Q?H3crsxSXHXadDMF2o9eyEhoBI6XN5tHesNP8ci2bBjjftSJsmzv8yX/C+we+?= =?us-ascii?Q?0DanmRdRhvf4BTTLGN++grM/N6K1F07BW63hsrHkGxov4I4SO6lZ/9skPJis?= =?us-ascii?Q?4X0n9Q/aaedVkL/7UTZhv1A2nvSkj7HzbyeeM03oh/IOpFs1KXVzezAvYwQf?= =?us-ascii?Q?01KLmi0lARBtwbj94cOmg5r6tD0hm2vFMXIqKwO5KrdXK29isiTwoRMxuy0F?= =?us-ascii?Q?DVOaXsMvYelVUcgYdP02ZJCuaL2q8y4MxC0kzeFe7X/2R9WAN+W2D/BkoTv6?= =?us-ascii?Q?CdvZ/msWfHICw859w4lhs3YPbiYa1f+AuqIMDTN1d+Wj3BTHAcgKNaKoJsn6?= =?us-ascii?Q?CoJH3qZVU8fuyydZgkT70YVwCNDyJpbwPuzFomewLtGzdQRz7fPICMIEgruf?= =?us-ascii?Q?hdiaJbO5EvkXCISTXDXLRF3Sven+132ARvYitmjeaXbaWjR8eLqe0H0dSFMd?= =?us-ascii?Q?s1PvQvyQYOzFCjiu7TSEEgrJKJQPTr/EODhMTiMxooBAk2s3U5+cqxheCPj1?= =?us-ascii?Q?++PUOMQuxUZwShrhA4QP/OJnLilU1h0Zi7OzPCH4w/juhYaBmmyDnx5OrJr7?= =?us-ascii?Q?eyY4RMxew2sSt5QTAhhaqj91NSKAbS30ldGFLKngH5A6qHRCNzH/Tx0MPrwz?= =?us-ascii?Q?qmdrdXlUxQojkgXCkGBzHTwVnhdXMznnImn6Iym+3ckAhDstu7lmcVfZ+qkq?= =?us-ascii?Q?TQtqU89GF/kAmgtcS9A+LdfBaHErdHHxVKLxPcKEX9qDWiHksybZzjlTJFx2?= =?us-ascii?Q?bkYGlc8Iyf6EYCZRM8gymm+R3F/BLK9m4dcFvI7FXQ5RMVxTrVzCILMT8RpJ?= =?us-ascii?Q?x3e1kpGiJVBWUNZOGqinVkowr5aMGbbmhI8yXBb7bweRgDiRo27Nf8gxZ5tM?= =?us-ascii?Q?Rx5uiC9s0tpiw7QWm+zdV+wxfV9X1mAU8baLcz20xzB+ShCAxE5MJXeWPuJW?= =?us-ascii?Q?p3WKRukJ1PL8luUVklZZu8HGQysAMBWZ5aLVqNgkmKr9igwftNpa9ZMA8OF1?= =?us-ascii?Q?54FKCgrTYe7XYhYraC7JwMo+gPhqE8ZqNZ3J49eAre9+I6g/LgRb88npZTvA?= =?us-ascii?Q?hadNhZOrKFG4TdmQfhc45qwXNsFw2AFQwTb84ZQGj77K+dWbgWWC1xx7riAy?= =?us-ascii?Q?HwiTWqtD/frSh3ACl8X4LBPhXTWXaISwaVI5FX0KRZGIKmNE4ylZ7eE8mURh?= =?us-ascii?Q?eDWMvMl5RHl6goqL4O2HuPw6Rg96yU7Dv4KsBb7FWGPctFPPvh+QSi7jyMvj?= =?us-ascii?Q?FDFkqCSjJQt/Tv4RoGQCjviVlNh5K5sHWuKSrudRa/rVBF7K9IZR8GaQKQwt?= =?us-ascii?Q?e6OniG4FsIJRObUMCbd7gA1jf3QLedjjq5Uk9E2ECxtCB9XwSQJ/tkXyginl?= =?us-ascii?Q?f3puRbm3VA=3D=3D?= X-OriginatorOrg: vivo.com X-MS-Exchange-CrossTenant-Network-Message-Id: 0967f460-abbe-4d73-69f0-08da34222286 X-MS-Exchange-CrossTenant-AuthSource: SG2PR06MB3367.apcprd06.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 12 May 2022 14:17:24.2394 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 923e42dc-48d5-4cbe-b582-1a797a6412ed X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: L/MqicdulRiUb9HvmeBWoTVOjJoT/Ir11E0LJTfIi5f/kFgIRwyMQGk/spLxXoKp3blc1vcw3nTW1Pf86iAhtg== X-MS-Exchange-Transport-CrossTenantHeadersStamped: HK0PR06MB2819 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch series tries to optimize the bpf_kporbe_multi_link_attach in bpf_trace.c Firstly, there is only one 'error' tag to handle error code. But in one 'error' tag, there are three 'free' functions which is not efficient. So I split this one tag to three tags to make it clear. Secondly, I simplify double 'if' statements to one statement. Finally, coccicheck reports an opportunity for vmemdup_user. So I use vmemdup_user to make code cleaner. Wan Jiabing (3): bpf: use 'error_xxx' tags in bpf_kprobe_multi_link_attach bpf: simplify if-if to if in bpf_kprobe_multi_link_attach bpf: use vmemdup_user instead of kvmalloc and copy_from_user kernel/trace/bpf_trace.c | 34 +++++++++++++++------------------- 1 file changed, 15 insertions(+), 19 deletions(-) -- 2.35.1