pinctrl: baytrail: Add missing spinlock usage in byt_gpio_irq_handler

According to VLI64 Intel Atom E3800 Specification Update (#329901)
concurrent read accesses may result in returning 0xffffffff and write
accesses may be dropped silently.
To workaround all accesses must be protected by locks.

Cc: stable@vger.kernel.org
Signed-off-by: Alexander Stein <alexander.stein@systec-electronic.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

path: root/fs/btrfs/inode-map.h

#ifndef __BTRFS_INODE_MAP
#define __BTRFS_INODE_MAP

void btrfs_init_free_ino_ctl(struct btrfs_root *root);
void btrfs_unpin_free_ino(struct btrfs_root *root);
void btrfs_return_ino(struct btrfs_root *root, u64 objectid);
int btrfs_find_free_ino(struct btrfs_root *root, u64 *objectid);
int btrfs_save_ino_cache(struct btrfs_root *root,
			 struct btrfs_trans_handle *trans);

int btrfs_find_free_objectid(struct btrfs_root *root, u64 *objectid);
int btrfs_find_highest_objectid(struct btrfs_root *root, u64 *objectid);

#endif