On Do, 2014-11-13 at 17:36 -0800, Alexei Starovoitov wrote: > the current meaning of BPF_MAP_UPDATE_ELEM syscall command is: > either update existing map element or create a new one. > Initially the plan was to add a new command to handle the case of > 'create new element if it didn't exist', but 'flags' style looks > cleaner and overall diff is much smaller (more code reused), so add 'flags' > attribute to BPF_MAP_UPDATE_ELEM command with the following meaning: > #define BPF_ANY 0 /* create new element or update existing */ > #define BPF_NOEXIST 1 /* create new element if it didn't exist */ > #define BPF_EXIST 2 /* update existing element */ Would a cmpxchg-alike function be handy here? Bye, Hannes -- To unsubscribe from this list: send the line "unsubscribe linux-api" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
