linux-kernel - [PATCH 2/3] fs/pstore: fs/squashfs: Change lz4 compressor functions to work with new version

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Date:   Tue, 20 Dec 2016 19:53:11 +0100
From:   Sven Schmidt <4sschmid@...ormatik.uni-hamburg.de>
To:     akpm@...ux-foundation.org
Cc:     bongkyu.kim@....com, sergey.senozhatsky@...il.com,
        gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
        Sven Schmidt <4sschmid@...ormatik.uni-hamburg.de>
Subject: [PATCH 2/3] fs/pstore: fs/squashfs: Change lz4 compressor functions to work with new version

This patch updates the fs/pstore and fs/squashfs to work with the
new LZ4 kernel module version.

Signed-off-by: Sven Schmidt <4sschmid@...ormatik.uni-hamburg.de>
---
 fs/pstore/platform.c      | 11 +++++------
 fs/squashfs/lz4_wrapper.c |  3 +--
 2 files changed, 6 insertions(+), 8 deletions(-)

diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 729677e..037dc07 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -342,7 +342,7 @@ static int compress_lz4(const void *in, void *out, size_t inlen, size_t outlen)
 {
 	int ret;
 
-	ret = lz4_compress(in, inlen, out, &outlen, workspace);
+	ret = LZ4_compress_default(in, out, inlen, outlen, workspace);
 	if (ret) {
 		pr_err("lz4_compress error, ret = %d!\n", ret);
 		return -EIO;
@@ -355,7 +355,7 @@ static int decompress_lz4(void *in, void *out, size_t inlen, size_t outlen)
 {
 	int ret;
 
-	ret = lz4_decompress_unknownoutputsize(in, inlen, out, &outlen);
+	ret = LZ4_decompress_safe(in, out, inlen, outlen);
 	if (ret) {
 		pr_err("lz4_decompress error, ret = %d!\n", ret);
 		return -EIO;
@@ -366,7 +366,7 @@ static int decompress_lz4(void *in, void *out, size_t inlen, size_t outlen)
 
 static void allocate_lz4(void)
 {
-	big_oops_buf_sz = lz4_compressbound(psinfo->bufsize);
+	big_oops_buf_sz = LZ4_compressBound(psinfo->bufsize);
 	big_oops_buf = kmalloc(big_oops_buf_sz, GFP_KERNEL);
 	if (big_oops_buf) {
 		workspace = kmalloc(LZ4_MEM_COMPRESS, GFP_KERNEL);
@@ -493,7 +493,6 @@ static void pstore_dump(struct kmsg_dumper *dumper,
 		if (!is_locked) {
 			pr_err("pstore dump routine blocked in %s path, may corrupt error record\n"
 				       , in_nmi() ? "NMI" : why);
-			return;
 		}
 	} else {
 		spin_lock_irqsave(&psinfo->buf_lock, flags);
@@ -585,8 +584,8 @@ static void pstore_console_write(struct console *con, const char *s, unsigned c)
 		} else {
 			spin_lock_irqsave(&psinfo->buf_lock, flags);
 		}
-		psinfo->write_buf(PSTORE_TYPE_CONSOLE, 0, &id, 0,
-				  s, 0, c, psinfo);
+		memcpy(psinfo->buf, s, c);
+		psinfo->write(PSTORE_TYPE_CONSOLE, 0, &id, 0, 0, 0, c, psinfo);
 		spin_unlock_irqrestore(&psinfo->buf_lock, flags);
 		s += c;
 		c = e - s;
diff --git a/fs/squashfs/lz4_wrapper.c b/fs/squashfs/lz4_wrapper.c
index ff4468b..c087a63 100644
--- a/fs/squashfs/lz4_wrapper.c
+++ b/fs/squashfs/lz4_wrapper.c
@@ -108,8 +108,7 @@ static int lz4_uncompress(struct squashfs_sb_info *msblk, void *strm,
 		put_bh(bh[i]);
 	}
 
-	res = lz4_decompress_unknownoutputsize(stream->input, length,
-					stream->output, &dest_len);
+	res = LZ4_decompress_safe(stream->input, stream->output, length, (int)dest_len);
 	if (res)
 		return -EIO;
 
-- 
2.1.4