ANDROID: mm: shmem: add vendor data in 'shmem_inode_info'

Add vendor specific data in the 'struct shmem_inode_info'.

Also properly initialize the vendor data by adding this fixup:
https://android-review.googlesource.com/c/kernel/common/+/2969472

Bug: 273448633
Change-Id: I83a3ac822275d2464af7eb25b869b816fdb7276e
Signed-off-by: Charan Teja Kalla <quic_charante@quicinc.com>
(cherry picked from commit f1d69f5a1119f3519dca0370f46b93bb5dfb7083)
Signed-off-by: Georgi Djakov <quic_c_gdjako@quicinc.com>

include/linux/shmem_fs.h

@@ -10,6 +10,7 @@
 #include <linux/xattr.h>
 #include <linux/fs_parser.h>
 #include <linux/userfaultfd_k.h>
+#include <linux/android_vendor.h>
 
 /* inode in-kernel data */
 
@@ -40,6 +41,8 @@ struct shmem_inode_info {
 	struct dquot __rcu	*i_dquot[MAXQUOTAS];
 #endif
 	struct inode		vfs_inode;
+
+	ANDROID_VENDOR_DATA(1);
 };
 
 #define SHMEM_FL_USER_VISIBLE		FS_FL_USER_VISIBLE

mm/shmem.c

@@ -84,6 +84,7 @@ static struct vfsmount *shm_mnt __ro_after_init;
 #include <linux/uuid.h>
 #include <linux/quotaops.h>
 #include <linux/rcupdate_wait.h>
+#include <linux/android_vendor.h>
 
 #include <linux/uaccess.h>
 
@@ -2816,6 +2817,7 @@ static struct inode *__shmem_get_inode(struct mnt_idmap *idmap,
 	inode->i_generation = get_random_u32();
 	info = SHMEM_I(inode);
 	memset(info, 0, (char *)inode - (char *)info);
+	android_init_vendor_data(info, 1);
 	spin_lock_init(&info->lock);
 	atomic_set(&info->stop_eviction, 0);
 	info->seals = F_SEAL_SEAL;