diff mbox series

[02/14] target/rd: drop double zeroing

Message ID 1600601186-7420-3-git-send-email-Julia.Lawall@inria.fr
State New
Headers show
Series drop double zeroing | expand

Commit Message

Julia Lawall Sept. 20, 2020, 11:26 a.m. UTC 
sg_init_table zeroes its first argument, so the allocation of that argument
doesn't have to.

the semantic patch that makes this change is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@@
expression x,n,flags;
@@

x = 
- kcalloc
+ kmalloc_array
  (n,sizeof(*x),flags)
...
sg_init_table(x,n)
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@inria.fr>

---
 drivers/target/target_core_rd.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Martin K. Petersen Oct. 8, 2020, 2:31 a.m. UTC | #1 
Julia,

> sg_init_table zeroes its first argument, so the allocation of that argument
> doesn't have to.

Applied to 5.10/scsi-staging, thanks!
diff mbox series

Patch

diff -u -p a/drivers/target/target_core_rd.c b/drivers/target/target_core_rd.c
--- a/drivers/target/target_core_rd.c
+++ b/drivers/target/target_core_rd.c
@@ -131,7 +131,7 @@  static int rd_allocate_sgl_table(struct
 		if (sg_per_table < total_sg_needed)
 			chain_entry = 1;
 
-		sg = kcalloc(sg_per_table + chain_entry, sizeof(*sg),
+		sg = kmalloc_array(sg_per_table + chain_entry, sizeof(*sg),
 				GFP_KERNEL);
 		if (!sg)
 			return -ENOMEM;