lib/raid6: replace custom zero page with ZERO_PAGE

Use the system-wide zero page instead of a custom zero page.

[herbert@gondor.apana.org.au: update lib/raid6/recov_rvv.c, per Klara]
  Link: https://lkml.kernel.org/r/aFkUnXWtxcgOTVkw@gondor.apana.org.au
Link: https://lkml.kernel.org/r/Z9flJNkWQICx0PXk@gondor.apana.org.au
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>
Cc: Song Liu <song@kernel.org>
Cc: Yu Kuai <yukuai3@huawei.com>
Cc: Klara Modin <klarasmodin@gmail.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

8 files changed, 24 insertions, 27 deletions

diff --git a/lib/raid6/algos.c b/lib/raid6/algos.c
index 75ce3e134b7c..799e0e5eac26 100644
--- a/lib/raid6/algos.c
+++ b/lib/raid6/algos.c
@@ -18,9 +18,6 @@
 #else
 #include <linux/module.h>
 #include <linux/gfp.h>
-/* In .bss so it's zeroed */
-const char raid6_empty_zero_page[PAGE_SIZE] __attribute__((aligned(256)));
-EXPORT_SYMBOL(raid6_empty_zero_page);
 #endif
 
 struct raid6_calls raid6_call;
diff --git a/lib/raid6/recov.c b/lib/raid6/recov.c
index a7c1b2bbe40d..b5e47c008b41 100644
--- a/lib/raid6/recov.c
+++ b/lib/raid6/recov.c
@@ -31,10 +31,10 @@ static void raid6_2data_recov_intx1(int disks, size_t bytes, int faila,
 	   Use the dead data pages as temporary storage for
 	   delta p and delta q */
 	dp = (u8 *)ptrs[faila];
-	ptrs[faila] = (void *)raid6_empty_zero_page;
+	ptrs[faila] = raid6_get_zero_page();
 	ptrs[disks-2] = dp;
 	dq = (u8 *)ptrs[failb];
-	ptrs[failb] = (void *)raid6_empty_zero_page;
+	ptrs[failb] = raid6_get_zero_page();
 	ptrs[disks-1] = dq;
 
 	raid6_call.gen_syndrome(disks, bytes, ptrs);
@@ -72,7 +72,7 @@ static void raid6_datap_recov_intx1(int disks, size_t bytes, int faila,
 	/* Compute syndrome with zero for the missing data page
 	   Use the dead data page as temporary storage for delta q */
 	dq = (u8 *)ptrs[faila];
-	ptrs[faila] = (void *)raid6_empty_zero_page;
+	ptrs[faila] = raid6_get_zero_page();
 	ptrs[disks-1] = dq;
 
 	raid6_call.gen_syndrome(disks, bytes, ptrs);
diff --git a/lib/raid6/recov_avx2.c b/lib/raid6/recov_avx2.c
index 4e8095403ee2..97d598d2535c 100644
--- a/lib/raid6/recov_avx2.c
+++ b/lib/raid6/recov_avx2.c
@@ -28,10 +28,10 @@ static void raid6_2data_recov_avx2(int disks, size_t bytes, int faila,
 	   Use the dead data pages as temporary storage for
 	   delta p and delta q */
 	dp = (u8 *)ptrs[faila];
-	ptrs[faila] = (void *)raid6_empty_zero_page;
+	ptrs[faila] = raid6_get_zero_page();
 	ptrs[disks-2] = dp;
 	dq = (u8 *)ptrs[failb];
-	ptrs[failb] = (void *)raid6_empty_zero_page;
+	ptrs[failb] = raid6_get_zero_page();
 	ptrs[disks-1] = dq;
 
 	raid6_call.gen_syndrome(disks, bytes, ptrs);
@@ -196,7 +196,7 @@ static void raid6_datap_recov_avx2(int disks, size_t bytes, int faila,
 	/* Compute syndrome with zero for the missing data page
 	   Use the dead data page as temporary storage for delta q */
 	dq = (u8 *)ptrs[faila];
-	ptrs[faila] = (void *)raid6_empty_zero_page;
+	ptrs[faila] = raid6_get_zero_page();
 	ptrs[disks-1] = dq;
 
 	raid6_call.gen_syndrome(disks, bytes, ptrs);
diff --git a/lib/raid6/recov_avx512.c b/lib/raid6/recov_avx512.c
index 310c715db313..7986120ca444 100644
--- a/lib/raid6/recov_avx512.c
+++ b/lib/raid6/recov_avx512.c
@@ -37,10 +37,10 @@ static void raid6_2data_recov_avx512(int disks, size_t bytes, int faila,
 	 */
 
 	dp = (u8 *)ptrs[faila];
-	ptrs[faila] = (void *)raid6_empty_zero_page;
+	ptrs[faila] = raid6_get_zero_page();
 	ptrs[disks-2] = dp;
 	dq = (u8 *)ptrs[failb];
-	ptrs[failb] = (void *)raid6_empty_zero_page;
+	ptrs[failb] = raid6_get_zero_page();
 	ptrs[disks-1] = dq;
 
 	raid6_call.gen_syndrome(disks, bytes, ptrs);
@@ -238,7 +238,7 @@ static void raid6_datap_recov_avx512(int disks, size_t bytes, int faila,
 	 */
 
 	dq = (u8 *)ptrs[faila];
-	ptrs[faila] = (void *)raid6_empty_zero_page;
+	ptrs[faila] = raid6_get_zero_page();
 	ptrs[disks-1] = dq;
 
 	raid6_call.gen_syndrome(disks, bytes, ptrs);
diff --git a/lib/raid6/recov_loongarch_simd.c b/lib/raid6/recov_loongarch_simd.c
index 94aeac85e6f7..93dc515997a1 100644
--- a/lib/raid6/recov_loongarch_simd.c
+++ b/lib/raid6/recov_loongarch_simd.c
@@ -42,10 +42,10 @@ static void raid6_2data_recov_lsx(int disks, size_t bytes, int faila,
 	 * delta p and delta q
 	 */
 	dp = (u8 *)ptrs[faila];
-	ptrs[faila] = (void *)raid6_empty_zero_page;
+	ptrs[faila] = raid6_get_zero_page();
 	ptrs[disks - 2] = dp;
 	dq = (u8 *)ptrs[failb];
-	ptrs[failb] = (void *)raid6_empty_zero_page;
+	ptrs[failb] = raid6_get_zero_page();
 	ptrs[disks - 1] = dq;
 
 	raid6_call.gen_syndrome(disks, bytes, ptrs);
@@ -197,7 +197,7 @@ static void raid6_datap_recov_lsx(int disks, size_t bytes, int faila,
 	 * Use the dead data page as temporary storage for delta q
 	 */
 	dq = (u8 *)ptrs[faila];
-	ptrs[faila] = (void *)raid6_empty_zero_page;
+	ptrs[faila] = raid6_get_zero_page();
 	ptrs[disks - 1] = dq;
 
 	raid6_call.gen_syndrome(disks, bytes, ptrs);
@@ -316,10 +316,10 @@ static void raid6_2data_recov_lasx(int disks, size_t bytes, int faila,
 	 * delta p and delta q
 	 */
 	dp = (u8 *)ptrs[faila];
-	ptrs[faila] = (void *)raid6_empty_zero_page;
+	ptrs[faila] = raid6_get_zero_page();
 	ptrs[disks - 2] = dp;
 	dq = (u8 *)ptrs[failb];
-	ptrs[failb] = (void *)raid6_empty_zero_page;
+	ptrs[failb] = raid6_get_zero_page();
 	ptrs[disks - 1] = dq;
 
 	raid6_call.gen_syndrome(disks, bytes, ptrs);
@@ -436,7 +436,7 @@ static void raid6_datap_recov_lasx(int disks, size_t bytes, int faila,
 	 * Use the dead data page as temporary storage for delta q
 	 */
 	dq = (u8 *)ptrs[faila];
-	ptrs[faila] = (void *)raid6_empty_zero_page;
+	ptrs[faila] = raid6_get_zero_page();
 	ptrs[disks - 1] = dq;
 
 	raid6_call.gen_syndrome(disks, bytes, ptrs);
diff --git a/lib/raid6/recov_neon.c b/lib/raid6/recov_neon.c
index 1bfc14174d4d..70e1404c1512 100644
--- a/lib/raid6/recov_neon.c
+++ b/lib/raid6/recov_neon.c
@@ -36,10 +36,10 @@ static void raid6_2data_recov_neon(int disks, size_t bytes, int faila,
 	 * delta p and delta q
 	 */
 	dp = (u8 *)ptrs[faila];
-	ptrs[faila] = (void *)raid6_empty_zero_page;
+	ptrs[faila] = raid6_get_zero_page();
 	ptrs[disks - 2] = dp;
 	dq = (u8 *)ptrs[failb];
-	ptrs[failb] = (void *)raid6_empty_zero_page;
+	ptrs[failb] = raid6_get_zero_page();
 	ptrs[disks - 1] = dq;
 
 	raid6_call.gen_syndrome(disks, bytes, ptrs);
@@ -74,7 +74,7 @@ static void raid6_datap_recov_neon(int disks, size_t bytes, int faila,
 	 * Use the dead data page as temporary storage for delta q
 	 */
 	dq = (u8 *)ptrs[faila];
-	ptrs[faila] = (void *)raid6_empty_zero_page;
+	ptrs[faila] = raid6_get_zero_page();
 	ptrs[disks - 1] = dq;
 
 	raid6_call.gen_syndrome(disks, bytes, ptrs);
diff --git a/lib/raid6/recov_s390xc.c b/lib/raid6/recov_s390xc.c
index 179eec900cea..1d32c01261be 100644
--- a/lib/raid6/recov_s390xc.c
+++ b/lib/raid6/recov_s390xc.c
@@ -35,10 +35,10 @@ static void raid6_2data_recov_s390xc(int disks, size_t bytes, int faila,
 	   Use the dead data pages as temporary storage for
 	   delta p and delta q */
 	dp = (u8 *)ptrs[faila];
-	ptrs[faila] = (void *)raid6_empty_zero_page;
+	ptrs[faila] = raid6_get_zero_page();
 	ptrs[disks-2] = dp;
 	dq = (u8 *)ptrs[failb];
-	ptrs[failb] = (void *)raid6_empty_zero_page;
+	ptrs[failb] = raid6_get_zero_page();
 	ptrs[disks-1] = dq;
 
 	raid6_call.gen_syndrome(disks, bytes, ptrs);
@@ -82,7 +82,7 @@ static void raid6_datap_recov_s390xc(int disks, size_t bytes, int faila,
 	/* Compute syndrome with zero for the missing data page
 	   Use the dead data page as temporary storage for delta q */
 	dq = (u8 *)ptrs[faila];
-	ptrs[faila] = (void *)raid6_empty_zero_page;
+	ptrs[faila] = raid6_get_zero_page();
 	ptrs[disks-1] = dq;
 
 	raid6_call.gen_syndrome(disks, bytes, ptrs);
diff --git a/lib/raid6/recov_ssse3.c b/lib/raid6/recov_ssse3.c
index 4bfa3c6b60de..2e849185c32b 100644
--- a/lib/raid6/recov_ssse3.c
+++ b/lib/raid6/recov_ssse3.c
@@ -30,10 +30,10 @@ static void raid6_2data_recov_ssse3(int disks, size_t bytes, int faila,
 	   Use the dead data pages as temporary storage for
 	   delta p and delta q */
 	dp = (u8 *)ptrs[faila];
-	ptrs[faila] = (void *)raid6_empty_zero_page;
+	ptrs[faila] = raid6_get_zero_page();
 	ptrs[disks-2] = dp;
 	dq = (u8 *)ptrs[failb];
-	ptrs[failb] = (void *)raid6_empty_zero_page;
+	ptrs[failb] = raid6_get_zero_page();
 	ptrs[disks-1] = dq;
 
 	raid6_call.gen_syndrome(disks, bytes, ptrs);
@@ -203,7 +203,7 @@ static void raid6_datap_recov_ssse3(int disks, size_t bytes, int faila,
 	/* Compute syndrome with zero for the missing data page
 	   Use the dead data page as temporary storage for delta q */
 	dq = (u8 *)ptrs[faila];
-	ptrs[faila] = (void *)raid6_empty_zero_page;
+	ptrs[faila] = raid6_get_zero_page();
 	ptrs[disks-1] = dq;
 
 	raid6_call.gen_syndrome(disks, bytes, ptrs);