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dmaengine: ioatdma: make sysfs attributes const

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The ioat_sysfs_entry structures are never modified, mark them as
read-only.

Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Acked-by: Dave Jiang <dave.jiang@intel.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260304-sysfs-const-ioat-v2-4-b9b82651219b@weissschuh.net
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Thomas Weißschuh
2026-03-04 22:44:40 +01:00
committed by Vinod Koul
parent 81ca3ad09b
commit 28c829977f
1 changed files with 10 additions and 10 deletions
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20
drivers/dma/ioat/sysfs.c
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@@ -32,7 +32,7 @@ static ssize_t cap_show(struct dma_chan *c, char *page)
dma_has_cap(DMA_INTERRUPT, dma->cap_mask) ? " intr" : "");
}
static struct ioat_sysfs_entry ioat_cap_attr = __ATTR_RO(cap);
static const struct ioat_sysfs_entry ioat_cap_attr = __ATTR_RO(cap);
static ssize_t version_show(struct dma_chan *c, char *page)
{
@@ -42,15 +42,15 @@ static ssize_t version_show(struct dma_chan *c, char *page)
return sprintf(page, "%d.%d\n",
ioat_dma->version >> 4, ioat_dma->version & 0xf);
}
static struct ioat_sysfs_entry ioat_version_attr = __ATTR_RO(version);
static const struct ioat_sysfs_entry ioat_version_attr = __ATTR_RO(version);
static ssize_t
ioat_attr_show(struct kobject *kobj, struct attribute *attr, char *page)
{
struct ioat_sysfs_entry *entry;
const struct ioat_sysfs_entry *entry;
struct ioatdma_chan *ioat_chan;
entry = container_of(attr, struct ioat_sysfs_entry, attr);
entry = container_of_const(attr, struct ioat_sysfs_entry, attr);
ioat_chan = container_of(kobj, struct ioatdma_chan, kobj);
if (!entry->show)
@@ -62,10 +62,10 @@ static ssize_t
ioat_attr_store(struct kobject *kobj, struct attribute *attr,
const char *page, size_t count)
{
struct ioat_sysfs_entry *entry;
const struct ioat_sysfs_entry *entry;
struct ioatdma_chan *ioat_chan;
entry = container_of(attr, struct ioat_sysfs_entry, attr);
entry = container_of_const(attr, struct ioat_sysfs_entry, attr);
ioat_chan = container_of(kobj, struct ioatdma_chan, kobj);
if (!entry->store)
@@ -120,7 +120,7 @@ static ssize_t ring_size_show(struct dma_chan *c, char *page)
return sprintf(page, "%d\n", (1 << ioat_chan->alloc_order) & ~1);
}
static struct ioat_sysfs_entry ring_size_attr = __ATTR_RO(ring_size);
static const struct ioat_sysfs_entry ring_size_attr = __ATTR_RO(ring_size);
static ssize_t ring_active_show(struct dma_chan *c, char *page)
{
@@ -129,7 +129,7 @@ static ssize_t ring_active_show(struct dma_chan *c, char *page)
/* ...taken outside the lock, no need to be precise */
return sprintf(page, "%d\n", ioat_ring_active(ioat_chan));
}
static struct ioat_sysfs_entry ring_active_attr = __ATTR_RO(ring_active);
static const struct ioat_sysfs_entry ring_active_attr = __ATTR_RO(ring_active);
static ssize_t intr_coalesce_show(struct dma_chan *c, char *page)
{
@@ -154,9 +154,9 @@ size_t count)
return count;
}
static struct ioat_sysfs_entry intr_coalesce_attr = __ATTR_RW(intr_coalesce);
static const struct ioat_sysfs_entry intr_coalesce_attr = __ATTR_RW(intr_coalesce);
static struct attribute *ioat_attrs[] = {
static const struct attribute *const ioat_attrs[] = {
&ring_size_attr.attr,
&ring_active_attr.attr,
&ioat_cap_attr.attr,