[PATCH] uml: locking documentation
Some locking documentation and a cleanup. uml_exitcode is copied into a local
before sprintf sees it, in case sprintf does anything non-atomic with it.
The rest are comments about why certain globals don't need any kind of
locking.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
diff --git a/arch/um/drivers/random.c b/arch/um/drivers/random.c
index ae99094..73b2bdd 100644
--- a/arch/um/drivers/random.c
+++ b/arch/um/drivers/random.c
@@ -20,6 +20,10 @@
#define RNG_MISCDEV_MINOR 183 /* official */
+/* Changed at init time, in the non-modular case, and at module load
+ * time, in the module case. Presumably, the module subsystem
+ * protects against a module being loaded twice at the same time.
+ */
static int random_fd = -1;
static int rng_dev_open (struct inode *inode, struct file *filp)