[PATCH v2 06/17] vdso: Change getrandom's generation to unsigned long

[Christophe Leroy]

Performing SMP atomic operations on u64 fails on powerpc32.

Random driver generation is handled as unsigned long not u64,
see for instance base_cnrg or struct crng.

Use the same type for vDSO's getrandom as it gets copied
from the above. This is also in line with the local
current_generation which is already an unsigned long.

Signed-off-by: Christophe Leroy <christophe.leroy at csgroup.eu>
---
 include/vdso/datapage.h  | 2 +-
 include/vdso/getrandom.h | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/vdso/datapage.h b/include/vdso/datapage.h
index b85f24cac3f5..00b66a9b5778 100644
--- a/include/vdso/datapage.h
+++ b/include/vdso/datapage.h
@@ -123,7 +123,7 @@ struct vdso_data {
  * @is_ready:	boolean signaling whether the RNG is initialized
  */
 struct vdso_rng_data {
-	u64	generation;
+	unsigned long	generation;
 	u8	is_ready;
 };
 
diff --git a/include/vdso/getrandom.h b/include/vdso/getrandom.h
index a8b7c14b0ae0..36fd166bf330 100644
--- a/include/vdso/getrandom.h
+++ b/include/vdso/getrandom.h
@@ -38,7 +38,7 @@ struct vgetrandom_state {
 		};
 		u8		batch_key[CHACHA_BLOCK_SIZE * 2];
 	};
-	u64			generation;
+	unsigned long		generation;
 	u8			pos;
 	bool 			in_use;
 };
-- 
2.44.0