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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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ARM: 7644/1: vmregion: remove vmregion code entirely
Now, there is no user for vmregion. So remove it. Acked-by: Nicolas Pitre <nico@linaro.org> Tested-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Joonsoo Kim
Russell King
parent
08a5c9a2bb
commit
48dc369d21
@ -6,7 +6,7 @@ obj-y := dma-mapping.o extable.o fault.o init.o \
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iomap.o
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obj-$(CONFIG_MMU) += fault-armv.o flush.o idmap.o ioremap.o \
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mmap.o pgd.o mmu.o vmregion.o
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mmap.o pgd.o mmu.o
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ifneq ($(CONFIG_MMU),y)
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obj-y += nommu.o
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@ -1,205 +0,0 @@
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#include <linux/fs.h>
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#include <linux/spinlock.h>
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#include <linux/list.h>
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#include <linux/proc_fs.h>
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#include <linux/seq_file.h>
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#include <linux/slab.h>
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#include "vmregion.h"
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/*
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* VM region handling support.
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*
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* This should become something generic, handling VM region allocations for
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* vmalloc and similar (ioremap, module space, etc).
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*
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* I envisage vmalloc()'s supporting vm_struct becoming:
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*
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* struct vm_struct {
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* struct vmregion region;
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* unsigned long flags;
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* struct page **pages;
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* unsigned int nr_pages;
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* unsigned long phys_addr;
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* };
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*
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* get_vm_area() would then call vmregion_alloc with an appropriate
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* struct vmregion head (eg):
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*
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* struct vmregion vmalloc_head = {
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* .vm_list = LIST_HEAD_INIT(vmalloc_head.vm_list),
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* .vm_start = VMALLOC_START,
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* .vm_end = VMALLOC_END,
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* };
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*
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* However, vmalloc_head.vm_start is variable (typically, it is dependent on
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* the amount of RAM found at boot time.) I would imagine that get_vm_area()
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* would have to initialise this each time prior to calling vmregion_alloc().
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*/
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struct arm_vmregion *
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arm_vmregion_alloc(struct arm_vmregion_head *head, size_t align,
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size_t size, gfp_t gfp, const void *caller)
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{
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unsigned long start = head->vm_start, addr = head->vm_end;
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unsigned long flags;
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struct arm_vmregion *c, *new;
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if (head->vm_end - head->vm_start < size) {
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printk(KERN_WARNING "%s: allocation too big (requested %#x)\n",
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__func__, size);
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goto out;
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}
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new = kmalloc(sizeof(struct arm_vmregion), gfp);
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if (!new)
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goto out;
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new->caller = caller;
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spin_lock_irqsave(&head->vm_lock, flags);
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addr = rounddown(addr - size, align);
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list_for_each_entry_reverse(c, &head->vm_list, vm_list) {
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if (addr >= c->vm_end)
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goto found;
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addr = rounddown(c->vm_start - size, align);
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if (addr < start)
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goto nospc;
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}
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found:
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/*
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* Insert this entry after the one we found.
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*/
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list_add(&new->vm_list, &c->vm_list);
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new->vm_start = addr;
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new->vm_end = addr + size;
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new->vm_active = 1;
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spin_unlock_irqrestore(&head->vm_lock, flags);
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return new;
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nospc:
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spin_unlock_irqrestore(&head->vm_lock, flags);
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kfree(new);
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out:
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return NULL;
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}
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static struct arm_vmregion *__arm_vmregion_find(struct arm_vmregion_head *head, unsigned long addr)
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{
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struct arm_vmregion *c;
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list_for_each_entry(c, &head->vm_list, vm_list) {
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if (c->vm_active && c->vm_start == addr)
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goto out;
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}
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c = NULL;
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out:
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return c;
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}
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struct arm_vmregion *arm_vmregion_find(struct arm_vmregion_head *head, unsigned long addr)
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{
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struct arm_vmregion *c;
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unsigned long flags;
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spin_lock_irqsave(&head->vm_lock, flags);
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c = __arm_vmregion_find(head, addr);
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spin_unlock_irqrestore(&head->vm_lock, flags);
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return c;
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}
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struct arm_vmregion *arm_vmregion_find_remove(struct arm_vmregion_head *head, unsigned long addr)
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{
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struct arm_vmregion *c;
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unsigned long flags;
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spin_lock_irqsave(&head->vm_lock, flags);
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c = __arm_vmregion_find(head, addr);
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if (c)
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c->vm_active = 0;
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spin_unlock_irqrestore(&head->vm_lock, flags);
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return c;
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}
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void arm_vmregion_free(struct arm_vmregion_head *head, struct arm_vmregion *c)
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{
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unsigned long flags;
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spin_lock_irqsave(&head->vm_lock, flags);
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list_del(&c->vm_list);
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spin_unlock_irqrestore(&head->vm_lock, flags);
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kfree(c);
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}
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#ifdef CONFIG_PROC_FS
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static int arm_vmregion_show(struct seq_file *m, void *p)
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{
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struct arm_vmregion *c = list_entry(p, struct arm_vmregion, vm_list);
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seq_printf(m, "0x%08lx-0x%08lx %7lu", c->vm_start, c->vm_end,
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c->vm_end - c->vm_start);
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if (c->caller)
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seq_printf(m, " %pS", (void *)c->caller);
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seq_putc(m, '\n');
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return 0;
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}
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static void *arm_vmregion_start(struct seq_file *m, loff_t *pos)
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{
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struct arm_vmregion_head *h = m->private;
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spin_lock_irq(&h->vm_lock);
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return seq_list_start(&h->vm_list, *pos);
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}
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static void *arm_vmregion_next(struct seq_file *m, void *p, loff_t *pos)
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{
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struct arm_vmregion_head *h = m->private;
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return seq_list_next(p, &h->vm_list, pos);
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}
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static void arm_vmregion_stop(struct seq_file *m, void *p)
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{
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struct arm_vmregion_head *h = m->private;
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spin_unlock_irq(&h->vm_lock);
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}
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static const struct seq_operations arm_vmregion_ops = {
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.start = arm_vmregion_start,
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.stop = arm_vmregion_stop,
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.next = arm_vmregion_next,
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.show = arm_vmregion_show,
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};
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static int arm_vmregion_open(struct inode *inode, struct file *file)
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{
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struct arm_vmregion_head *h = PDE(inode)->data;
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int ret = seq_open(file, &arm_vmregion_ops);
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if (!ret) {
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struct seq_file *m = file->private_data;
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m->private = h;
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}
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return ret;
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}
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static const struct file_operations arm_vmregion_fops = {
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.open = arm_vmregion_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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int arm_vmregion_create_proc(const char *path, struct arm_vmregion_head *h)
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{
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proc_create_data(path, S_IRUSR, NULL, &arm_vmregion_fops, h);
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return 0;
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}
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#else
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int arm_vmregion_create_proc(const char *path, struct arm_vmregion_head *h)
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{
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return 0;
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}
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#endif
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@ -1,31 +0,0 @@
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#ifndef VMREGION_H
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#define VMREGION_H
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#include <linux/spinlock.h>
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#include <linux/list.h>
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struct page;
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struct arm_vmregion_head {
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spinlock_t vm_lock;
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struct list_head vm_list;
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unsigned long vm_start;
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unsigned long vm_end;
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};
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struct arm_vmregion {
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struct list_head vm_list;
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unsigned long vm_start;
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unsigned long vm_end;
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int vm_active;
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const void *caller;
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};
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struct arm_vmregion *arm_vmregion_alloc(struct arm_vmregion_head *, size_t, size_t, gfp_t, const void *);
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struct arm_vmregion *arm_vmregion_find(struct arm_vmregion_head *, unsigned long);
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struct arm_vmregion *arm_vmregion_find_remove(struct arm_vmregion_head *, unsigned long);
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void arm_vmregion_free(struct arm_vmregion_head *, struct arm_vmregion *);
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int arm_vmregion_create_proc(const char *, struct arm_vmregion_head *);
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#endif
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