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aoe: make aoe_class a static const structure

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Now that the driver core allows for struct class to be in read-only
memory, move the aoe_class structure to be declared at build time
placing it into read-only memory, instead of having to be dynamically
allocated at boot time.

Cc: Justin Sanders <justin@coraid.com>
Cc: Jens Axboe <axboe@kernel.dk>
Cc: linux-block@vger.kernel.org
Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Ivan Orlov <ivan.orlov0322@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Link: https://lore.kernel.org/r/20230620180129.645646-6-gregkh@linuxfoundation.org
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Ivan Orlov 2023-06-20 20:01:31 +02:00 committed by Jens Axboe
parent 137380c0ec
commit 65d7a37d4e
1 changed files with 17 additions and 13 deletions
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30
drivers/block/aoe/aoechr.c
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@ -49,7 +49,7 @@ static int emsgs_head_idx, emsgs_tail_idx;
static struct completion emsgs_comp;
static spinlock_t emsgs_lock;
static int nblocked_emsgs_readers;
static struct class *aoe_class;
static struct aoe_chardev chardevs[] = {
{ MINOR_ERR, "err" },
{ MINOR_DISCOVER, "discover" },
@ -58,6 +58,16 @@ static struct aoe_chardev chardevs[] = {
{ MINOR_FLUSH, "flush" },
};
static char *aoe_devnode(const struct device *dev, umode_t *mode)
{
return kasprintf(GFP_KERNEL, "etherd/%s", dev_name(dev));
}
static const struct class aoe_class = {
.name = "aoe",
.devnode = aoe_devnode,
};
static int
discover(void)
{
@ -273,11 +283,6 @@ static const struct file_operations aoe_fops = {
.llseek = noop_llseek,
};
static char *aoe_devnode(const struct device *dev, umode_t *mode)
{
return kasprintf(GFP_KERNEL, "etherd/%s", dev_name(dev));
}
int __init
aoechr_init(void)
{
@ -290,15 +295,14 @@ aoechr_init(void)
}
init_completion(&emsgs_comp);
spin_lock_init(&emsgs_lock);
aoe_class = class_create("aoe");
if (IS_ERR(aoe_class)) {
n = class_register(&aoe_class);
if (n) {
unregister_chrdev(AOE_MAJOR, "aoechr");
return PTR_ERR(aoe_class);
return n;
}
aoe_class->devnode = aoe_devnode;
for (i = 0; i < ARRAY_SIZE(chardevs); ++i)
device_create(aoe_class, NULL,
device_create(&aoe_class, NULL,
MKDEV(AOE_MAJOR, chardevs[i].minor), NULL,
chardevs[i].name);
@ -311,8 +315,8 @@ aoechr_exit(void)
int i;
for (i = 0; i < ARRAY_SIZE(chardevs); ++i)
device_destroy(aoe_class, MKDEV(AOE_MAJOR, chardevs[i].minor));
class_destroy(aoe_class);
device_destroy(&aoe_class, MKDEV(AOE_MAJOR, chardevs[i].minor));
class_unregister(&aoe_class);
unregister_chrdev(AOE_MAJOR, "aoechr");
}