The patch titled Subject: drivers/char/misc.c:misc_register(): do not loop on misc_list unconditionally has been removed from the -mm tree. Its filename was drivers-char-miscc-misc_register-do-not-loop-on-misc_list-unconditionally.patch This patch was dropped because it was merged into mainline or a subsystem tree ------------------------------------------------------ From: "Dae S. Kim" <dae@xxxxxxxxxxx> Subject: drivers/char/misc.c:misc_register(): do not loop on misc_list unconditionally If the minor number is assigned dynamically, there is no need to search for misc->minor in misc_list, since misc->minor == MISC_DYNAMIC_MINOR. [akpm@xxxxxxxxxxxxxxxxxxxx: reduce scope of local `c'] Signed-off-by: Dae S. Kim <dae@xxxxxxxxxxx> Cc: Arnd Bergmann <arnd@xxxxxxxx> Cc: Greg KH <greg@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- drivers/char/misc.c | 16 +++++++++------- 1 file changed, 9 insertions(+), 7 deletions(-) diff -puN drivers/char/misc.c~drivers-char-miscc-misc_register-do-not-loop-on-misc_list-unconditionally drivers/char/misc.c --- a/drivers/char/misc.c~drivers-char-miscc-misc_register-do-not-loop-on-misc_list-unconditionally +++ a/drivers/char/misc.c @@ -183,19 +183,12 @@ static const struct file_operations misc int misc_register(struct miscdevice * misc) { - struct miscdevice *c; dev_t dev; int err = 0; INIT_LIST_HEAD(&misc->list); mutex_lock(&misc_mtx); - list_for_each_entry(c, &misc_list, list) { - if (c->minor == misc->minor) { - mutex_unlock(&misc_mtx); - return -EBUSY; - } - } if (misc->minor == MISC_DYNAMIC_MINOR) { int i = find_first_zero_bit(misc_minors, DYNAMIC_MINORS); @@ -205,6 +198,15 @@ int misc_register(struct miscdevice * mi } misc->minor = DYNAMIC_MINORS - i - 1; set_bit(i, misc_minors); + } else { + struct miscdevice *c; + + list_for_each_entry(c, &misc_list, list) { + if (c->minor == misc->minor) { + mutex_unlock(&misc_mtx); + return -EBUSY; + } + } } dev = MKDEV(MISC_MAJOR, misc->minor); _ Patches currently in -mm which might be from dae@xxxxxxxxxxx are origin.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html