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RDMA/hfi1: Constify struct mmu_rb_ops

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'struct mmu_rb_ops' is not modified in this driver.

Constifying this structure moves some data to a read-only section, so
increase overall security.

On a x86_64, with allmodconfig, as an example:
Before:
======
   text	   data	    bss	    dec	    hex	filename
  10879	    164	      0	  11043	   2b23	drivers/infiniband/hw/hfi1/pin_system.o

After:
=====
   text	   data	    bss	    dec	    hex	filename
  10907	    140	      0	  11047	   2b27	drivers/infiniband/hw/hfi1/pin_system.o

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Link: https://lore.kernel.org/r/b826dd05eefa5f4d6a7a1b4d191eaf37c714ed04.1719259997.git.christophe.jaillet@wanadoo.fr
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Signed-off-by: Jason Gunthorpe <jgg@nvidia.com>
This commit is contained in:
Christophe JAILLET 2024-06-24 22:13:27 +02:00 committed by Jason Gunthorpe
parent 4adcaf969d
commit 5a905e33b2
3 changed files with 4 additions and 4 deletions
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2
drivers/infiniband/hw/hfi1/mmu_rb.c
View File

@ -40,7 +40,7 @@ static unsigned long mmu_node_last(struct mmu_rb_node *node)
}
int hfi1_mmu_rb_register(void *ops_arg,
struct mmu_rb_ops *ops,
const struct mmu_rb_ops *ops,
struct workqueue_struct *wq,
struct mmu_rb_handler **handler)
{

4
drivers/infiniband/hw/hfi1/mmu_rb.h
View File

@ -42,7 +42,7 @@ struct mmu_rb_handler {
/* Begin on a new cachline boundary here */
struct rb_root_cached root ____cacheline_aligned_in_smp;
void *ops_arg;
struct mmu_rb_ops *ops;
const struct mmu_rb_ops *ops;
struct list_head lru_list;
struct work_struct del_work;
struct list_head del_list;
@ -51,7 +51,7 @@ struct mmu_rb_handler {
};
int hfi1_mmu_rb_register(void *ops_arg,
struct mmu_rb_ops *ops,
const struct mmu_rb_ops *ops,
struct workqueue_struct *wq,
struct mmu_rb_handler **handler);
void hfi1_mmu_rb_unregister(struct mmu_rb_handler *handler);

2
drivers/infiniband/hw/hfi1/pin_system.c
View File

@ -26,7 +26,7 @@ static int sdma_rb_evict(void *arg, struct mmu_rb_node *mnode, void *arg2,
bool *stop);
static void sdma_rb_remove(void *arg, struct mmu_rb_node *mnode);
static struct mmu_rb_ops sdma_rb_ops = {
static const struct mmu_rb_ops sdma_rb_ops = {
.filter = sdma_rb_filter,
.evict = sdma_rb_evict,
.remove = sdma_rb_remove,