Kernel 4.4 upstream patches

patch/kernel/udoo-next/04-patch-4.4.152-153.patch

@@ -0,0 +1,134 @@
+diff --git a/Makefile b/Makefile
+index 523b0d4354fb..208a813be615 100644
+--- a/Makefile
++++ b/Makefile
+@@ -1,6 +1,6 @@
+ VERSION = 4
+ PATCHLEVEL = 4
+-SUBLEVEL = 152
++SUBLEVEL = 153
+ EXTRAVERSION =
+ NAME = Blurry Fish Butt
+ 
+diff --git a/arch/x86/include/asm/mmu_context.h b/arch/x86/include/asm/mmu_context.h
+index effc12767cbf..d8d19fe99e45 100644
+--- a/arch/x86/include/asm/mmu_context.h
++++ b/arch/x86/include/asm/mmu_context.h
+@@ -109,8 +109,7 @@ static inline int init_new_context(struct task_struct *tsk,
+ 				   struct mm_struct *mm)
+ {
+ 	mm->context.ctx_id = atomic64_inc_return(&last_mm_ctx_id);
+-	init_new_context_ldt(tsk, mm);
+-	return 0;
++	return init_new_context_ldt(tsk, mm);
+ }
+ static inline void destroy_context(struct mm_struct *mm)
+ {
+diff --git a/arch/x86/mm/pageattr.c b/arch/x86/mm/pageattr.c
+index 27610c2d1821..1007fa80f5a6 100644
+--- a/arch/x86/mm/pageattr.c
++++ b/arch/x86/mm/pageattr.c
+@@ -1006,7 +1006,7 @@ static int populate_pmd(struct cpa_data *cpa,
+ 
+ 		pmd = pmd_offset(pud, start);
+ 
+-		set_pmd(pmd, pmd_mkhuge(pfn_pmd(cpa->pfn,
++		set_pmd(pmd, pmd_mkhuge(pfn_pmd(cpa->pfn >> PAGE_SHIFT,
+ 					canon_pgprot(pmd_pgprot))));
+ 
+ 		start	  += PMD_SIZE;
+diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
+index c319d5eaabcf..28316b292b8a 100644
+--- a/fs/overlayfs/overlayfs.h
++++ b/fs/overlayfs/overlayfs.h
+@@ -163,6 +163,7 @@ extern const struct file_operations ovl_dir_operations;
+ int ovl_check_empty_dir(struct dentry *dentry, struct list_head *list);
+ void ovl_cleanup_whiteouts(struct dentry *upper, struct list_head *list);
+ void ovl_cache_free(struct list_head *list);
++int ovl_check_d_type_supported(struct path *realpath);
+ 
+ /* inode.c */
+ int ovl_setattr(struct dentry *dentry, struct iattr *attr);
+diff --git a/fs/overlayfs/readdir.c b/fs/overlayfs/readdir.c
+index 299a6e1d6b77..0c59955c4653 100644
+--- a/fs/overlayfs/readdir.c
++++ b/fs/overlayfs/readdir.c
+@@ -43,6 +43,7 @@ struct ovl_readdir_data {
+ 	struct ovl_cache_entry *first_maybe_whiteout;
+ 	int count;
+ 	int err;
++	bool d_type_supported;
+ };
+ 
+ struct ovl_dir_file {
+@@ -581,3 +582,39 @@ void ovl_cleanup_whiteouts(struct dentry *upper, struct list_head *list)
+ 	}
+ 	mutex_unlock(&upper->d_inode->i_mutex);
+ }
++
++static int ovl_check_d_type(struct dir_context *ctx, const char *name,
++			  int namelen, loff_t offset, u64 ino,
++			  unsigned int d_type)
++{
++	struct ovl_readdir_data *rdd =
++		container_of(ctx, struct ovl_readdir_data, ctx);
++
++	/* Even if d_type is not supported, DT_DIR is returned for . and .. */
++	if (!strncmp(name, ".", namelen) || !strncmp(name, "..", namelen))
++		return 0;
++
++	if (d_type != DT_UNKNOWN)
++		rdd->d_type_supported = true;
++
++	return 0;
++}
++
++/*
++ * Returns 1 if d_type is supported, 0 not supported/unknown. Negative values
++ * if error is encountered.
++ */
++int ovl_check_d_type_supported(struct path *realpath)
++{
++	int err;
++	struct ovl_readdir_data rdd = {
++		.ctx.actor = ovl_check_d_type,
++		.d_type_supported = false,
++	};
++
++	err = ovl_dir_read(realpath, &rdd);
++	if (err)
++		return err;
++
++	return rdd.d_type_supported;
++}
+diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
+index d70208c0de84..0035cb80ecd1 100644
+--- a/fs/overlayfs/super.c
++++ b/fs/overlayfs/super.c
+@@ -1054,6 +1054,26 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
+ 			sb->s_flags |= MS_RDONLY;
+ 			ufs->workdir = NULL;
+ 		}
++
++		/*
++		 * Upper should support d_type, else whiteouts are visible.
++		 * Given workdir and upper are on same fs, we can do
++		 * iterate_dir() on workdir. This check requires successful
++		 * creation of workdir in previous step.
++		 */
++		if (ufs->workdir) {
++			err = ovl_check_d_type_supported(&workpath);
++			if (err < 0)
++				goto out_put_workdir;
++
++			/*
++			 * We allowed this configuration and don't want to
++			 * break users over kernel upgrade. So warn instead
++			 * of erroring out.
++			 */
++			if (!err)
++				pr_warn("overlayfs: upper fs needs to support d_type.\n");
++		}
+ 	}
+ 
+ 	err = -ENOMEM;