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[PATCH] comments on locking of task->comm 

Add some comments about task->comm, to explain what it is near its definition
and provide some important pointers to its uses.

Signed-off-by: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Paolo 'Blaisorblade' Giarrusso 2005-05-05 16:16:12 -07:00 committed by Linus Torvalds
parent 291c4a75ce
commit 3677209239
2 changed files with 8 additions and 3 deletions
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4
fs/exec.c
View File

@ -869,9 +869,11 @@ int flush_old_exec(struct linux_binprm * bprm)
if (current->euid == current->uid && current->egid == current->gid)
current->mm->dumpable = 1;
name = bprm->filename;
/* Copies the binary name from after last slash */
for (i=0; (ch = *(name++)) != '\0';) {
if (ch == '/')
i = 0;
i = 0; /* overwrite what we wrote */
else
if (i < (sizeof(tcomm) - 1))
tcomm[i++] = ch;

7
include/linux/sched.h
View File

@ -578,7 +578,7 @@ struct task_struct {
unsigned long flags; /* per process flags, defined below */
unsigned long ptrace;
int lock_depth; /* Lock depth */
int lock_depth; /* BKL lock depth */
int prio, static_prio;
struct list_head run_list;
@ -661,7 +661,10 @@ struct task_struct {
struct key *thread_keyring; /* keyring private to this thread */
#endif
int oomkilladj; /* OOM kill score adjustment (bit shift). */
char comm[TASK_COMM_LEN];
char comm[TASK_COMM_LEN]; /* executable name excluding path
- access with [gs]et_task_comm (which lock
it with task_lock())
- initialized normally by flush_old_exec */
/* file system info */
int link_count, total_link_count;
/* ipc stuff */