Examine the following function (in 'kernel/sched/fair.c'): 2 static struct sched_entity *_pick_next_entity (struct sched_entity *se) { struct rb_node *next = rb_next(&se->run_node); if (!next) return NULL; I return rb_entry (next, struct sched_entity, run_node); } In particular, have a look at the last statement: rb_entry (next, struct sched_entity, run_node); The first parameter (next) is clearly a variable, that is defined a few lines above. However, the two parameters that follow do not seem to make sense: the second one is a type name, and the third one is a name that is not defined anywhere in 'fair.c', nor in the included headers. How can you explain this?

Examine the following function (in 'kernel/sched/fair.c'): 2 static struct sched_entity _pick_next_entity (struct sched_entity se) { struct rb_node *next = rb_next(&se->run_node); if (!next) return NULL; I return rb_entry (next, struct sched_entity, run_node); } In particular, have a look at the last statement: rb_entry (next, struct sched_entity, run_node); The first parameter (next) is clearly a variable, that is defined a few lines above. However, the two parameters that follow do not seem to make sense: the second one is a type name, and the third one is a name that is not defined anywhere in 'fair.c', nor in the included headers. How can you explain this?

Database System Concepts

7th Edition

ISBN:9780078022159

Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan

Chapter1: Introduction

Section: Chapter Questions

Problem 1PE

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