[lustre-devel] [PATCH 14/42] lustre: ptlrpc: fiemap flexible array

[James Simmons <jsimmons@infradead.org>]

From: Shaun Tancheff <shaun.tancheff@hpe.com>

Linux commit v5.19-rc2-1-g94dfc73e7cf4
treewide: uapi: Replace zero-length arrays with flexible-array
  members
Adjust wiretest to handle flexible array when
sizeof(fiemap->fm_extents) is undefined.

HPE-bug-id: LUS-11388
WC-bug-id: https://jira.whamcloud.com/browse/LU-16363
Lustre-commit: fedf1e8bd70ccb2aa ("LU-16363 build: fiemap flexible array")
Signed-off-by: Shaun Tancheff <shaun.tancheff@hpe.com>
Reviewed-on: https://review.whamcloud.com/c/fs/lustre-release/+/49305
Reviewed-by: Andreas Dilger <adilger@whamcloud.com>
Reviewed-by: Arshad Hussain <arshad.hussain@aeoncomputing.com>
Reviewed-by: Oleg Drokin <green@whamcloud.com>
Signed-off-by: James Simmons <jsimmons@infradead.org>
---
 fs/lustre/ptlrpc/wiretest.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/fs/lustre/ptlrpc/wiretest.c b/fs/lustre/ptlrpc/wiretest.c
index daa11e5d76dc..bf12435262d4 100644
--- a/fs/lustre/ptlrpc/wiretest.c
+++ b/fs/lustre/ptlrpc/wiretest.c
@@ -4223,8 +4223,7 @@ void lustre_assert_wire_constants(void)
 		 (long long)(int)sizeof(((struct fiemap *)0)->fm_reserved));
 	LASSERTF((int)offsetof(struct fiemap, fm_extents) == 32, "found %lld\n",
 		 (long long)(int)offsetof(struct fiemap, fm_extents));
-	LASSERTF((int)sizeof(((struct fiemap *)0)->fm_extents) == 0, "found %lld\n",
-		 (long long)(int)sizeof(((struct fiemap *)0)->fm_extents));
+	BUILD_BUG_ON(offsetof(struct fiemap, fm_extents) != sizeof(struct fiemap));
 	BUILD_BUG_ON(FIEMAP_FLAG_SYNC != 0x00000001);
 	BUILD_BUG_ON(FIEMAP_FLAG_XATTR != 0x00000002);
 	BUILD_BUG_ON(FIEMAP_FLAG_DEVICE_ORDER != 0x40000000);
-- 
2.27.0

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