erofs: move from drivers/staging/ to fs/

Since 5.4, erofs has been moved into fs/.

Keep up with the 5.10 LTS kernel until the following commit:
dbaf435ddf97 ("erofs: add unsupported inode i_format check")

Signed-off-by: Gao Xiang <hsiangkao@linux.alibaba.com>
Tested-by: Liu Bo <bo.liu@linux.alibaba.com>
Acked-by: Joseph Qi <joseph.qi@linux.alibaba.com>
Change-Id: If4827beb38d76d65844e31f9a594010871849918

drivers/staging/Kconfig

@@ -122,8 +122,6 @@ source "drivers/staging/gasket/Kconfig"
 
 source "drivers/staging/axis-fifo/Kconfig"
 
-source "drivers/staging/erofs/Kconfig"
-
 source "drivers/staging/qcacld-3.0/Kconfig"
 
 endif # STAGING

drivers/staging/Makefile

@@ -51,5 +51,4 @@ obj-$(CONFIG_SOC_MT7621)	+= mt7621-eth/
 obj-$(CONFIG_SOC_MT7621)	+= mt7621-dts/
 obj-$(CONFIG_STAGING_GASKET_FRAMEWORK)	+= gasket/
 obj-$(CONFIG_XIL_AXIS_FIFO)	+= axis-fifo/
-obj-$(CONFIG_EROFS_FS)		+= erofs/
 obj-$(CONFIG_QCA_CLD_WLAN)	+= qcacld-3.0/

drivers/staging/erofs/TODO

@@ -1,45 +0,0 @@
-
-EROFS is still working in progress, thus it is not suitable
-for all productive uses. play at your own risk :)
-
-TODO List:
- - add the missing error handling code
-   (mainly existed in xattr and decompression submodules);
-
- - finalize erofs ondisk format design  (which means that
-   minor on-disk revisions could happen later);
-
- - documentation and detailed technical analysis;
-
- - general code review and clean up
-   (including confusing variable names and code snippets);
-
- - support larger compressed clustersizes for selection
-   (currently erofs only works as expected with the page-sized
-    compressed cluster configuration, usually 4KB);
-
- - support more lossless data compression algorithms
-   in addition to LZ4 algorithms in VLE approach;
-
- - data deduplication and other useful features.
-
-erofs-mkfs (preview version) binaries for i386 / x86_64 are available at:
-
-   https://github.com/hsiangkao/erofs_mkfs_binary
-
-It is still in progress opening mkfs source code to public,
-in any case an open-source mkfs will be released in the near future.
-
-
-Code, suggestions, etc, are welcome. Please feel free to
-ask and send patches,
-
-To:
-  linux-erofs mailing list   <linux-erofs@lists.ozlabs.org>
-  Gao Xiang                  <gaoxiang25@huawei.com>
-  Chao Yu                    <yuchao0@huawei.com>
-
-Cc: (for linux-kernel upstream patches)
-  Greg Kroah-Hartman         <gregkh@linuxfoundation.org>
-  linux-staging mailing list <devel@driverdev.osuosl.org>
-

fs/Kconfig

@@ -260,6 +260,7 @@ source "fs/pstore/Kconfig"
 source "fs/sysv/Kconfig"
 source "fs/ufs/Kconfig"
 source "fs/exofs/Kconfig"
+source "fs/erofs/Kconfig"
 
 endif # MISC_FILESYSTEMS
 

fs/Makefile

@@ -137,3 +137,4 @@ obj-y				+= exofs/ # Multiple modules
 obj-$(CONFIG_CEPH_FS)		+= ceph/
 obj-$(CONFIG_PSTORE)		+= pstore/
 obj-$(CONFIG_EFIVAR_FS)		+= efivarfs/
+obj-$(CONFIG_EROFS_FS)		+= erofs/

fs/erofs/Makefile

@@ -5,9 +5,6 @@ EROFS_VERSION = "1.0"
 ccflags-y += -DEROFS_VERSION=\"$(EROFS_VERSION)\"
 
 obj-$(CONFIG_EROFS_FS) += erofs.o
-# staging requirement: to be self-contained in its own directory
-ccflags-y += -I$(src)/include
 erofs-objs := super.o inode.o data.o namei.o dir.o utils.o
 erofs-$(CONFIG_EROFS_FS_XATTR) += xattr.o
 erofs-$(CONFIG_EROFS_FS_ZIP) += decompressor.o zmap.o zdata.o
-