[PATCH] lib/raid6: drop RAID6_USE_EMPTY_ZERO_PAGE

From: Giulio Benetti
Date: Wed Oct 19 2022 - 12:06:30 EST


RAID6_USE_EMPTY_ZERO_PAGE is unused and hardcoded to 0, so let's drop it.

Signed-off-by: Giulio Benetti <giulio.benetti@xxxxxxxxxxxxxxxxxxxxxx>
---
include/linux/raid/pq.h | 8 --------
lib/raid6/algos.c | 2 --
2 files changed, 10 deletions(-)

diff --git a/include/linux/raid/pq.h b/include/linux/raid/pq.h
index d6e5a1feb947..f29aaaf2eb21 100644
--- a/include/linux/raid/pq.h
+++ b/include/linux/raid/pq.h
@@ -10,17 +10,9 @@

#ifdef __KERNEL__

-/* Set to 1 to use kernel-wide empty_zero_page */
-#define RAID6_USE_EMPTY_ZERO_PAGE 0
#include <linux/blkdev.h>

-/* We need a pre-zeroed page... if we don't want to use the kernel-provided
- one define it here */
-#if RAID6_USE_EMPTY_ZERO_PAGE
-# define raid6_empty_zero_page empty_zero_page
-#else
extern const char raid6_empty_zero_page[PAGE_SIZE];
-#endif

#else /* ! __KERNEL__ */
/* Used for testing in user space */
diff --git a/lib/raid6/algos.c b/lib/raid6/algos.c
index 39b74221f4a7..a22a05c9af8a 100644
--- a/lib/raid6/algos.c
+++ b/lib/raid6/algos.c
@@ -18,12 +18,10 @@
#else
#include <linux/module.h>
#include <linux/gfp.h>
-#if !RAID6_USE_EMPTY_ZERO_PAGE
/* In .bss so it's zeroed */
const char raid6_empty_zero_page[PAGE_SIZE] __attribute__((aligned(256)));
EXPORT_SYMBOL(raid6_empty_zero_page);
#endif
-#endif

struct raid6_calls raid6_call;
EXPORT_SYMBOL_GPL(raid6_call);
--
2.34.1