- tty_register_driver-only-allocate-tty-instances-when-defined.patch removed from -mm tree

- tty_register_driver-only-allocate-tty-instances-when-defined.patch removed from -mm tree

[akpm]

The patch titled
     tty_register_driver: only allocate tty instances when defined
has been removed from the -mm tree.  Its filename was
     tty_register_driver-only-allocate-tty-instances-when-defined.patch

This patch was dropped because it was merged into mainline or a subsystem tree

------------------------------------------------------
Subject: tty_register_driver: only allocate tty instances when defined
From: Andy Whitcroft <apw@shadowen.org>

If device->num is zero we attempt to kmalloc() zero bytes.  When SLUB is
enabled this returns a null pointer and take that as an allocation failure
and fail the device register.  Check for no devices and avoid the
allocation.

[akpm: opportunistic kzalloc() conversion]
Signed-off-by: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/char/tty_io.c |    5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff -puN drivers/char/tty_io.c~tty_register_driver-only-allocate-tty-instances-when-defined drivers/char/tty_io.c
--- a/drivers/char/tty_io.c~tty_register_driver-only-allocate-tty-instances-when-defined
+++ a/drivers/char/tty_io.c
@@ -3720,11 +3720,10 @@ int tty_register_driver(struct tty_drive
 	if (driver->flags & TTY_DRIVER_INSTALLED)
 		return 0;
 
-	if (!(driver->flags & TTY_DRIVER_DEVPTS_MEM)) {
-		p = kmalloc(driver->num * 3 * sizeof(void *), GFP_KERNEL);
+	if (!(driver->flags & TTY_DRIVER_DEVPTS_MEM) && driver->num) {
+		p = kzalloc(driver->num * 3 * sizeof(void *), GFP_KERNEL);
 		if (!p)
 			return -ENOMEM;
-		memset(p, 0, driver->num * 3 * sizeof(void *));
 	}
 
 	if (!driver->major) {
_

Patches currently in -mm which might be from apw@shadowen.org are

origin.patch
pci-device-ensure-sysdata-initialised-v2.patch
add-a-bitmap-that-is-used-to-track-flags-affecting-a-block-of-pages.patch
add-a-configure-option-to-group-pages-by-mobility.patch
move-free-pages-between-lists-on-steal.patch
move-free-pages-between-lists-on-steal-anti-fragmentation-switch-over-to-pfn_valid_within.patch
do-not-group-pages-by-mobility-type-on-low-memory-systems.patch
fix-corruption-of-memmap-on-ia64-sparsemem-when-mem_section-is-not-a-power-of-2.patch
bias-the-location-of-pages-freed-for-min_free_kbytes-in-the-same-max_order_nr_pages-blocks.patch
remove-page_group_by_mobility.patch
dont-group-high-order-atomic-allocations.patch
create-the-zone_movable-zone.patch
handle-kernelcore=-generic.patch
lumpy-reclaim-v4.patch
lumpy-move-to-using-pfn_valid_within.patch
i386-mmzone-use-__maybe_unused.patch