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get rid of ->scm_work_list

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recursion in __scm_destroy() will be cut by delaying final fput()

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-06-24 10:03:05 +04:00
parent 3ffa3c0e3f
commit 6120d3dbb1
3 changed files with 3 additions and 21 deletions
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1
include/linux/sched.h
View File

@ -1546,7 +1546,6 @@ struct task_struct {
unsigned long timer_slack_ns;
unsigned long default_timer_slack_ns;
struct list_head *scm_work_list;
#ifdef CONFIG_FUNCTION_GRAPH_TRACER
/* Index of current stored address in ret_stack */
int curr_ret_stack;

1
include/net/scm.h
View File

@ -13,7 +13,6 @@
#define SCM_MAX_FD 253
struct scm_fp_list {
struct list_head list;
short count;
short max;
struct file *fp[SCM_MAX_FD];

22
net/core/scm.c
View File

@ -109,25 +109,9 @@ void __scm_destroy(struct scm_cookie *scm)
if (fpl) {
scm->fp = NULL;
if (current->scm_work_list) {
list_add_tail(&fpl->list, current->scm_work_list);
} else {
LIST_HEAD(work_list);
current->scm_work_list = &work_list;
list_add(&fpl->list, &work_list);
while (!list_empty(&work_list)) {
fpl = list_first_entry(&work_list, struct scm_fp_list, list);
list_del(&fpl->list);
for (i=fpl->count-1; i>=0; i--)
fput(fpl->fp[i]);
kfree(fpl);
}
current->scm_work_list = NULL;
}
for (i=fpl->count-1; i>=0; i--)
fput(fpl->fp[i]);
kfree(fpl);
}
}
EXPORT_SYMBOL(__scm_destroy);