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generated by cgit v1.2.3 (git 2.25.1) at 2025-11-25 06:45:53 +0000
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--- a/fs/ubifs/Kconfig
+++ b/fs/ubifs/Kconfig
@@ -5,8 +5,10 @@ config UBIFS_FS
 	select CRYPTO if UBIFS_FS_ADVANCED_COMPR
 	select CRYPTO if UBIFS_FS_LZO
 	select CRYPTO if UBIFS_FS_ZLIB
+	select CRYPTO if UBIFS_FS_XZ
 	select CRYPTO_LZO if UBIFS_FS_LZO
 	select CRYPTO_DEFLATE if UBIFS_FS_ZLIB
+	select CRYPTO_XZ if UBIFS_FS_XZ
 	depends on MTD_UBI
 	help
 	  UBIFS is a file system for flash devices which works on top of UBI.
@@ -35,3 +37,12 @@ config UBIFS_FS_ZLIB
 	default y
 	help
 	  Zlib compresses better than LZO but it is slower. Say 'Y' if unsure.
+
+config UBIFS_FS_XZ
+	bool "XZ decompression support" if UBIFS_FS_ADVANCED_COMPR
+	depends on UBIFS_FS
+	default y
+	help
+	  XZ compresses better the ZLIB but it is slower..
+	  Say 'Y' if unsure.
+
--- a/fs/ubifs/compress.c
+++ b/fs/ubifs/compress.c
@@ -71,6 +71,24 @@ static struct ubifs_compressor zlib_comp
 };
 #endif
 
+#ifdef CONFIG_UBIFS_FS_XZ
+static DEFINE_MUTEX(xz_enc_mutex);
+static DEFINE_MUTEX(xz_dec_mutex);
+
+static struct ubifs_compressor xz_compr = {
+	.compr_type = UBIFS_COMPR_XZ,
+	.comp_mutex = &xz_enc_mutex,
+	.decomp_mutex = &xz_dec_mutex,
+	.name = "xz",
+	.capi_name = "xz",
+};
+#else
+static struct ubifs_compressor xz_compr = {
+	.compr_type = UBIFS_COMPR_XZ,
+	.name = "xz",
+};
+#endif
+
 /* All UBIFS compressors */
 struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT];
 
@@ -232,9 +250,15 @@ int __init ubifs_compressors_init(void)
 	if (err)
 		goto out_lzo;
 
+	err = compr_init(&xz_compr);
+	if (err)
+		goto out_zlib;
+
 	ubifs_compressors[UBIFS_COMPR_NONE] = &none_compr;
 	return 0;
 
+out_zlib:
+	compr_exit(&zlib_compr);
 out_lzo:
 	compr_exit(&lzo_compr);
 	return err;
@@ -247,4 +271,5 @@ void ubifs_compressors_exit(void)
 {
 	compr_exit(&lzo_compr);
 	compr_exit(&zlib_compr);
+	compr_exit(&xz_compr);
 }
--- a/fs/ubifs/ubifs-media.h
+++ b/fs/ubifs/ubifs-media.h
@@ -332,12 +332,14 @@ enum {
  * UBIFS_COMPR_NONE: no compression
  * UBIFS_COMPR_LZO: LZO compression
  * UBIFS_COMPR_ZLIB: ZLIB compression
+ * UBIFS_COMPR_XZ: XZ compression
  * UBIFS_COMPR_TYPES_CNT: count of supported compression types
  */
 enum {
 	UBIFS_COMPR_NONE,
 	UBIFS_COMPR_LZO,
 	UBIFS_COMPR_ZLIB,
+	UBIFS_COMPR_XZ,
 	UBIFS_COMPR_TYPES_CNT,
 };