[PATCH 5.15 201/691] xz: cleanup CRC32 edits from 2018

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5.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Lasse Collin <lasse.collin@xxxxxxxxxxx>

[ Upstream commit 2ee96abef214550d9e92f5143ee3ac1fd1323e67 ]

In 2018, a dependency on <linux/crc32poly.h> was added to avoid
duplicating the same constant in multiple files.  Two months later it was
found to be a bad idea and the definition of CRC32_POLY_LE macro was moved
into xz_private.h to avoid including <linux/crc32poly.h>.

xz_private.h is a wrong place for it too.  Revert back to the upstream
version which has the poly in xz_crc32_init() in xz_crc32.c.

Link: https://lkml.kernel.org/r/20240721133633.47721-10-lasse.collin@xxxxxxxxxxx
Fixes: faa16bc404d7 ("lib: Use existing define with polynomial")
Fixes: 242cdad873a7 ("lib/xz: Put CRC32_POLY_LE in xz_private.h")
Signed-off-by: Lasse Collin <lasse.collin@xxxxxxxxxxx>
Reviewed-by: Sam James <sam@xxxxxxxxxx>
Tested-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> (powerpc)
Cc: Krzysztof Kozlowski <krzk@xxxxxxxxxx>
Cc: Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>
Cc: Joel Stanley <joel@xxxxxxxxx>
Cc: Albert Ou <aou@xxxxxxxxxxxxxxxxx>
Cc: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Emil Renner Berthing <emil.renner.berthing@xxxxxxxxxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Jonathan Corbet <corbet@xxxxxxx>
Cc: Jubin Zhong <zhongjubin@xxxxxxxxxx>
Cc: Jules Maselbas <jmaselbas@xxxxxxxx>
Cc: Palmer Dabbelt <palmer@xxxxxxxxxxx>
Cc: Paul Walmsley <paul.walmsley@xxxxxxxxxx>
Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx>
Cc: Rui Li <me@xxxxxxxxx>
Cc: Simon Glass <sjg@xxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 lib/xz/xz_crc32.c   | 2 +-
 lib/xz/xz_private.h | 4 ----
 2 files changed, 1 insertion(+), 5 deletions(-)

diff --git a/lib/xz/xz_crc32.c b/lib/xz/xz_crc32.c
index 88a2c35e1b597..5627b00fca296 100644
--- a/lib/xz/xz_crc32.c
+++ b/lib/xz/xz_crc32.c
@@ -29,7 +29,7 @@ STATIC_RW_DATA uint32_t xz_crc32_table[256];
 
 XZ_EXTERN void xz_crc32_init(void)
 {
-	const uint32_t poly = CRC32_POLY_LE;
+	const uint32_t poly = 0xEDB88320;
 
 	uint32_t i;
 	uint32_t j;
diff --git a/lib/xz/xz_private.h b/lib/xz/xz_private.h
index 09360ebb510ef..482b90f363fe3 100644
--- a/lib/xz/xz_private.h
+++ b/lib/xz/xz_private.h
@@ -102,10 +102,6 @@
 #	endif
 #endif
 
-#ifndef CRC32_POLY_LE
-#define CRC32_POLY_LE 0xedb88320
-#endif
-
 /*
  * Allocate memory for LZMA2 decoder. xz_dec_lzma2_reset() must be used
  * before calling xz_dec_lzma2_run().
-- 
2.43.0







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