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bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
147 lines
3.3 KiB
C
147 lines
3.3 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* CMA SysFS Interface
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*
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* Copyright (c) 2021 Minchan Kim <minchan@kernel.org>
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*/
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#include <linux/cma.h>
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#include <linux/kernel.h>
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#include <linux/slab.h>
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#include "cma.h"
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#define CMA_ATTR_RO(_name) \
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static struct kobj_attribute _name##_attr = __ATTR_RO(_name)
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void cma_sysfs_account_success_pages(struct cma *cma, unsigned long nr_pages)
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{
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atomic64_add(nr_pages, &cma->nr_pages_succeeded);
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}
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void cma_sysfs_account_fail_pages(struct cma *cma, unsigned long nr_pages)
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{
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atomic64_add(nr_pages, &cma->nr_pages_failed);
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}
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void cma_sysfs_account_release_pages(struct cma *cma, unsigned long nr_pages)
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{
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atomic64_add(nr_pages, &cma->nr_pages_released);
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}
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static inline struct cma *cma_from_kobj(struct kobject *kobj)
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{
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return container_of(kobj, struct cma_kobject, kobj)->cma;
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}
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static ssize_t alloc_pages_success_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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struct cma *cma = cma_from_kobj(kobj);
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return sysfs_emit(buf, "%llu\n",
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atomic64_read(&cma->nr_pages_succeeded));
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}
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CMA_ATTR_RO(alloc_pages_success);
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static ssize_t alloc_pages_fail_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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struct cma *cma = cma_from_kobj(kobj);
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return sysfs_emit(buf, "%llu\n", atomic64_read(&cma->nr_pages_failed));
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}
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CMA_ATTR_RO(alloc_pages_fail);
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static ssize_t release_pages_success_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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struct cma *cma = cma_from_kobj(kobj);
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return sysfs_emit(buf, "%llu\n", atomic64_read(&cma->nr_pages_released));
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}
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CMA_ATTR_RO(release_pages_success);
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static ssize_t total_pages_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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struct cma *cma = cma_from_kobj(kobj);
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return sysfs_emit(buf, "%lu\n", cma->count);
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}
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CMA_ATTR_RO(total_pages);
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static ssize_t available_pages_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *buf)
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{
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struct cma *cma = cma_from_kobj(kobj);
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return sysfs_emit(buf, "%lu\n", cma->available_count);
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}
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CMA_ATTR_RO(available_pages);
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static void cma_kobj_release(struct kobject *kobj)
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{
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struct cma *cma = cma_from_kobj(kobj);
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struct cma_kobject *cma_kobj = cma->cma_kobj;
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kfree(cma_kobj);
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cma->cma_kobj = NULL;
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}
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static struct attribute *cma_attrs[] = {
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&alloc_pages_success_attr.attr,
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&alloc_pages_fail_attr.attr,
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&release_pages_success_attr.attr,
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&total_pages_attr.attr,
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&available_pages_attr.attr,
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NULL,
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};
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ATTRIBUTE_GROUPS(cma);
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static const struct kobj_type cma_ktype = {
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.release = cma_kobj_release,
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.sysfs_ops = &kobj_sysfs_ops,
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.default_groups = cma_groups,
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};
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static int __init cma_sysfs_init(void)
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{
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struct kobject *cma_kobj_root;
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struct cma_kobject *cma_kobj;
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struct cma *cma;
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int i, err;
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cma_kobj_root = kobject_create_and_add("cma", mm_kobj);
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if (!cma_kobj_root)
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return -ENOMEM;
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for (i = 0; i < cma_area_count; i++) {
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cma_kobj = kzalloc_obj(*cma_kobj);
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if (!cma_kobj) {
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err = -ENOMEM;
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goto out;
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}
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cma = &cma_areas[i];
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cma->cma_kobj = cma_kobj;
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cma_kobj->cma = cma;
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err = kobject_init_and_add(&cma_kobj->kobj, &cma_ktype,
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cma_kobj_root, "%s", cma->name);
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if (err) {
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kobject_put(&cma_kobj->kobj);
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goto out;
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}
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}
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return 0;
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out:
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while (--i >= 0) {
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cma = &cma_areas[i];
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kobject_put(&cma->cma_kobj->kobj);
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}
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kobject_put(cma_kobj_root);
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return err;
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}
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subsys_initcall(cma_sysfs_init);
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