int idr_alloc(struct idr *idp, void *ptr, int start, int end, gfp_t gfp_mask); ``` 其中,idp是一个指向IDR对象的指针,ptr是要关联的对象指针,start和end是ID范围的起始值和结束值,gfp_mask是内存分配标志。 idr_alloc方法的工作过程如下: 1. 首先,idr_alloc方法会从IDR对象的空闲ID列表中查找一...
idr_alloc函数是Linux内核中的一个函数,用于分配IDR(ID Range)对象中的空闲ID。IDR是一种用于管理连续整数范围的数据结构,常见于内核中需要为对象分配唯一标识符的场景。 该函数的定义位于文件lib/idr.c中。以下是其原型: intidr_alloc(structidr*idp,void*ptr,intstart,intend,gfp_tgfp); 参数说明: idp:指向...
打了一天电话都打不通。就是说你这一天除了打电话之外,没有做其他事情这就是同步。 异步就是比如你...
函数名称:dr_alloc() - Allocate an ID.*@idr: IDR handle.*@ptr: Pointer to be associated with the new ID.*@start: The minimum ID (inclusive).*@end: The maximum ID (exclusive).*@gfp: Memory allocation flags. 函数原型:int idr_alloc(struct idr *idr, void *ptr, int start, int end...
if (!idr_pre_get(&dca_idr, GFP_KERNEL)) return -ENOMEM; idr_preload(GFP_KERNEL); spin_lock(&dca_idr_lock); err = idr_get_new(&dca_idr, dca, &dca->id);ret = idr_alloc(&dca_idr, dca, 0, 0, GFP_NOWAIT); if (ret >= 0) dca->id = ret;spin...
idr: fix param name in idr_alloc_cyclic() doc Browse files The relevant parameter is 'start' and not 'nextid' Fixes: 460488c ("idr: Remove idr_alloc_ext") Signed-off-by: Ariel Marcovitch <arielmarcovitch@gmail.com> Signed-off-by: Matthew Wilcox (Oracle) <willy@infradead.org>...
+ ret = idr_alloc(&worker_pool_idr, pool, 0, 0, GFP_KERNEL); + if (ret >= 0) + pool->id = ret; mutex_unlock(&worker_pool_idr_mutex); - return ret; + return ret < 0 ? ret : 0; } /* -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-...
In the source code implementation it says idr_alloc() is used to allocate new idr entry. I couldn't find the man page and want to know why it is used especially when writing drivers for MTD devices. ___ Kernelnewbies mailing list Kernelnewbies@kernelnewbies.org http://lists.kernelnewbies...
打了一天电话都打不通。就是说你这一天除了打电话之外,没有做其他事情这就是同步。 异步就是比如你...
static __init int idr_demo_init(void) { struct node *np; int id;/* proload for idr_alloc */ idr_preload(GFP_KERNEL);/* Allocate a id from IDR */ idr_array[0] = idr_alloc_cyclic(&BiscuitOS_idr, &node0, 1, INT_MAX, GFP_ATOMIC);...