AcoSail/kernel_optimize_test
8
0
Fork 0
forked from luck/tmp_suning_uos_patched
Code Pull Requests Activity

[PATCH] uml: stack consumption reduction

Browse Source 
Fix some stack abuse in the sysrq t path.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Jeff Dike 2006-09-29 01:58:52 -07:00 committed by Linus Torvalds
parent 80c1374914
commit f92afe56a0
2 changed files with 14 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

15
arch/um/drivers/mconsole_kern.c
View File

@ -598,6 +598,11 @@ void mconsole_remove(struct mc_request *req)
mconsole_reply(req, err_msg, err, 0); mconsole_reply(req, err_msg, err, 0);
} }
struct mconsole_output {
struct list_head list;
struct mc_request *req;
};
static DEFINE_SPINLOCK(console_lock); static DEFINE_SPINLOCK(console_lock);
static LIST_HEAD(clients); static LIST_HEAD(clients);
static char console_buf[MCONSOLE_MAX_DATA]; static char console_buf[MCONSOLE_MAX_DATA];
@ -622,10 +627,10 @@ static void console_write(struct console *console, const char *string,
return; return;
list_for_each(ele, &clients){ list_for_each(ele, &clients){
struct mconsole_entry *entry; struct mconsole_output *entry;
entry = list_entry(ele, struct mconsole_entry, list); entry = list_entry(ele, struct mconsole_output, list);
mconsole_reply_len(&entry->request, console_buf, mconsole_reply_len(entry->req, console_buf,
console_index, 0, 1); console_index, 0, 1);
} }
@ -649,10 +654,10 @@ late_initcall(mc_add_console);
static void with_console(struct mc_request *req, void (*proc)(void *), static void with_console(struct mc_request *req, void (*proc)(void *),
void *arg) void *arg)
{ {
struct mconsole_entry entry; struct mconsole_output entry;
unsigned long flags; unsigned long flags;
entry.request = *req; entry.req = req;
list_add(&entry.list, &clients); list_add(&entry.list, &clients);
spin_lock_irqsave(&console_lock, flags); spin_lock_irqsave(&console_lock, flags);

4
arch/um/drivers/mconsole_user.c
View File

@ -131,6 +131,10 @@ int mconsole_get_request(int fd, struct mc_request *req)
int mconsole_reply_len(struct mc_request *req, const char *str, int total, int mconsole_reply_len(struct mc_request *req, const char *str, int total,
int err, int more) int err, int more)
{ {
/* XXX This is a stack consumption problem. It'd be nice to
* make it global and serialize access to it, but there are a
* ton of callers to this function.
*/
struct mconsole_reply reply; struct mconsole_reply reply;
int len, n; int len, n;