[linux-kernel] Update patches for v2

contrib/linux-kernel/0000-cover-letter.patch

@@ -0,0 +1,96 @@
+From 8bc9a0ae5c86a6d02d9a5274b9965ddac0e8d330 Mon Sep 17 00:00:00 2001
+From: Nick Terrell <terrelln@fb.com>
+Date: Wed, 28 Jun 2017 22:00:00 -0700
+Subject: [PATCH v2 0/4] Add xxhash and zstd modules
+
+Hi all,
+
+This patch set adds xxhash, zstd compression, and zstd decompression
+modules. It also adds zstd support to BtrFS and SquashFS.
+
+Each patch has relevant summaries, benchmarks, and tests.
+
+Best,
+Nick Terrell
+
+Changelog:
+
+v1 -> v2:
+- Make pointer in lib/xxhash.c:394 non-const (1/4)
+- Use div_u64() for division of u64s (2/4)
+- Reduce stack usage of ZSTD_compressSequences(), ZSTD_buildSeqTable(),
+  ZSTD_decompressSequencesLong(), FSE_buildDTable(), FSE_decompress_wksp(),
+  HUF_writeCTable(), HUF_readStats(), HUF_readCTable(),
+  HUF_compressWeights(), HUF_readDTableX2(), and HUF_readDTableX4() (2/4)
+- No zstd function uses more than 400 B of stack space (2/4)
+
+Nick Terrell (4):
+  lib: Add xxhash module
+  lib: Add zstd modules
+  btrfs: Add zstd support
+  squashfs: Add zstd support
+
+ fs/btrfs/Kconfig           |    2 +
+ fs/btrfs/Makefile          |    2 +-
+ fs/btrfs/compression.c     |    1 +
+ fs/btrfs/compression.h     |    6 +-
+ fs/btrfs/ctree.h           |    1 +
+ fs/btrfs/disk-io.c         |    2 +
+ fs/btrfs/ioctl.c           |    6 +-
+ fs/btrfs/props.c           |    6 +
+ fs/btrfs/super.c           |   12 +-
+ fs/btrfs/sysfs.c           |    2 +
+ fs/btrfs/zstd.c            |  433 ++++++
+ fs/squashfs/Kconfig        |   14 +
+ fs/squashfs/Makefile       |    1 +
+ fs/squashfs/decompressor.c |    7 +
+ fs/squashfs/decompressor.h |    4 +
+ fs/squashfs/squashfs_fs.h  |    1 +
+ fs/squashfs/zstd_wrapper.c |  150 ++
+ include/linux/xxhash.h     |  236 +++
+ include/linux/zstd.h       | 1157 +++++++++++++++
+ include/uapi/linux/btrfs.h |    8 +-
+ lib/Kconfig                |   11 +
+ lib/Makefile               |    3 +
+ lib/xxhash.c               |  500 +++++++
+ lib/zstd/Makefile          |   18 +
+ lib/zstd/bitstream.h       |  374 +++++
+ lib/zstd/compress.c        | 3479 ++++++++++++++++++++++++++++++++++++++++++++
+ lib/zstd/decompress.c      | 2526 ++++++++++++++++++++++++++++++++
+ lib/zstd/entropy_common.c  |  243 ++++
+ lib/zstd/error_private.h   |   53 +
+ lib/zstd/fse.h             |  575 ++++++++
+ lib/zstd/fse_compress.c    |  795 ++++++++++
+ lib/zstd/fse_decompress.c  |  332 +++++
+ lib/zstd/huf.h             |  212 +++
+ lib/zstd/huf_compress.c    |  771 ++++++++++
+ lib/zstd/huf_decompress.c  |  960 ++++++++++++
+ lib/zstd/mem.h             |  151 ++
+ lib/zstd/zstd_common.c     |   75 +
+ lib/zstd/zstd_internal.h   |  269 ++++
+ lib/zstd/zstd_opt.h        | 1014 +++++++++++++
+ 39 files changed, 14400 insertions(+), 12 deletions(-)
+ create mode 100644 fs/btrfs/zstd.c
+ create mode 100644 fs/squashfs/zstd_wrapper.c
+ create mode 100644 include/linux/xxhash.h
+ create mode 100644 include/linux/zstd.h
+ create mode 100644 lib/xxhash.c
+ create mode 100644 lib/zstd/Makefile
+ create mode 100644 lib/zstd/bitstream.h
+ create mode 100644 lib/zstd/compress.c
+ create mode 100644 lib/zstd/decompress.c
+ create mode 100644 lib/zstd/entropy_common.c
+ create mode 100644 lib/zstd/error_private.h
+ create mode 100644 lib/zstd/fse.h
+ create mode 100644 lib/zstd/fse_compress.c
+ create mode 100644 lib/zstd/fse_decompress.c
+ create mode 100644 lib/zstd/huf.h
+ create mode 100644 lib/zstd/huf_compress.c
+ create mode 100644 lib/zstd/huf_decompress.c
+ create mode 100644 lib/zstd/mem.h
+ create mode 100644 lib/zstd/zstd_common.c
+ create mode 100644 lib/zstd/zstd_internal.h
+ create mode 100644 lib/zstd/zstd_opt.h
+
+--
+2.9.3

contrib/linux-kernel/0001-lib-Add-xxhash-module.patch

@@ -1,7 +1,7 @@
-From e75beb7c2e05550b2846e31ad8a0082c188504da Mon Sep 17 00:00:00 2001
+From 5ac909c415ab4a18fd90794793c96e450795e8c6 Mon Sep 17 00:00:00 2001
 From: Nick Terrell <terrelln@fb.com>
-Date: Wed, 21 Jun 2017 17:27:42 -0700
-Subject: [PATCH 1/4] lib: Add xxhash module
+Date: Wed, 21 Jun 2017 17:37:36 -0700
+Subject: [PATCH v2 1/4] lib: Add xxhash module
 
 Adds xxhash kernel module with xxh32 and xxh64 hashes. xxhash is an
 extremely fast non-cryptographic hash algorithm for checksumming.
@@ -73,6 +73,9 @@ XXHash source repository: https://github.com/cyan4973/xxhash
 
 Signed-off-by: Nick Terrell <terrelln@fb.com>
 ---
+v1 -> v2:
+- Make pointer in lib/xxhash.c:394 non-const
+
  include/linux/xxhash.h | 236 +++++++++++++++++++++++
  lib/Kconfig            |   3 +
  lib/Makefile           |   1 +
@@ -330,7 +333,7 @@ index 0c8b78a..b6009d7 100644
 @@ -184,6 +184,9 @@ config CRC8
  	  when they need to do cyclic redundancy check according CRC8
  	  algorithm. Module will be called crc8.
- 
+
 +config XXHASH
 +	tristate
 +
@@ -347,11 +350,11 @@ index 0166fbc..1338226 100644
  obj-$(CONFIG_CRC8)	+= crc8.o
 +obj-$(CONFIG_XXHASH)	+= xxhash.o
  obj-$(CONFIG_GENERIC_ALLOCATOR) += genalloc.o
- 
+
  obj-$(CONFIG_842_COMPRESS) += 842/
 diff --git a/lib/xxhash.c b/lib/xxhash.c
 new file mode 100644
-index 0000000..dc94904
+index 0000000..aa61e2a
 --- /dev/null
 +++ b/lib/xxhash.c
 @@ -0,0 +1,500 @@
@@ -748,7 +751,7 @@ index 0000000..dc94904
 +	}
 +
 +	if (state->memsize) { /* tmp buffer is full */
-+		const uint64_t *p64 = state->mem64;
++		uint64_t *p64 = state->mem64;
 +
 +		memcpy(((uint8_t *)p64) + state->memsize, input,
 +			32 - state->memsize);
@@ -855,6 +858,5 @@ index 0000000..dc94904
 +
 +MODULE_LICENSE("Dual BSD/GPL");
 +MODULE_DESCRIPTION("xxHash");
--- 
+--
 2.9.3
-