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Message-Id: <1352912154-16210-2-git-send-email-js1304@gmail.com>
Date: Thu, 15 Nov 2012 01:55:52 +0900
From: Joonsoo Kim <js1304@...il.com>
To: Russell King <rmk+kernel@....linux.org.uk>
Cc: linux-kernel@...r.kernel.org, linux-mm@...ck.org,
linux-arm-kernel@...ts.infradead.org,
Joonsoo Kim <js1304@...il.com>
Subject: [RFC PATCH 1/3] ARM: vmregion: remove vmregion code entirely
Now, there is no user for vmregion.
So remove it.
Signed-off-by: Joonsoo Kim <js1304@...il.com>
diff --git a/arch/arm/mm/Makefile b/arch/arm/mm/Makefile
index 8a9c4cb..4e333fa 100644
--- a/arch/arm/mm/Makefile
+++ b/arch/arm/mm/Makefile
@@ -6,7 +6,7 @@ obj-y := dma-mapping.o extable.o fault.o init.o \
iomap.o
obj-$(CONFIG_MMU) += fault-armv.o flush.o idmap.o ioremap.o \
- mmap.o pgd.o mmu.o vmregion.o
+ mmap.o pgd.o mmu.o
ifneq ($(CONFIG_MMU),y)
obj-y += nommu.o
diff --git a/arch/arm/mm/vmregion.c b/arch/arm/mm/vmregion.c
deleted file mode 100644
index a631016..0000000
--- a/arch/arm/mm/vmregion.c
+++ /dev/null
@@ -1,205 +0,0 @@
-#include <linux/fs.h>
-#include <linux/spinlock.h>
-#include <linux/list.h>
-#include <linux/proc_fs.h>
-#include <linux/seq_file.h>
-#include <linux/slab.h>
-
-#include "vmregion.h"
-
-/*
- * VM region handling support.
- *
- * This should become something generic, handling VM region allocations for
- * vmalloc and similar (ioremap, module space, etc).
- *
- * I envisage vmalloc()'s supporting vm_struct becoming:
- *
- * struct vm_struct {
- * struct vmregion region;
- * unsigned long flags;
- * struct page **pages;
- * unsigned int nr_pages;
- * unsigned long phys_addr;
- * };
- *
- * get_vm_area() would then call vmregion_alloc with an appropriate
- * struct vmregion head (eg):
- *
- * struct vmregion vmalloc_head = {
- * .vm_list = LIST_HEAD_INIT(vmalloc_head.vm_list),
- * .vm_start = VMALLOC_START,
- * .vm_end = VMALLOC_END,
- * };
- *
- * However, vmalloc_head.vm_start is variable (typically, it is dependent on
- * the amount of RAM found at boot time.) I would imagine that get_vm_area()
- * would have to initialise this each time prior to calling vmregion_alloc().
- */
-
-struct arm_vmregion *
-arm_vmregion_alloc(struct arm_vmregion_head *head, size_t align,
- size_t size, gfp_t gfp, const void *caller)
-{
- unsigned long start = head->vm_start, addr = head->vm_end;
- unsigned long flags;
- struct arm_vmregion *c, *new;
-
- if (head->vm_end - head->vm_start < size) {
- printk(KERN_WARNING "%s: allocation too big (requested %#x)\n",
- __func__, size);
- goto out;
- }
-
- new = kmalloc(sizeof(struct arm_vmregion), gfp);
- if (!new)
- goto out;
-
- new->caller = caller;
-
- spin_lock_irqsave(&head->vm_lock, flags);
-
- addr = rounddown(addr - size, align);
- list_for_each_entry_reverse(c, &head->vm_list, vm_list) {
- if (addr >= c->vm_end)
- goto found;
- addr = rounddown(c->vm_start - size, align);
- if (addr < start)
- goto nospc;
- }
-
- found:
- /*
- * Insert this entry after the one we found.
- */
- list_add(&new->vm_list, &c->vm_list);
- new->vm_start = addr;
- new->vm_end = addr + size;
- new->vm_active = 1;
-
- spin_unlock_irqrestore(&head->vm_lock, flags);
- return new;
-
- nospc:
- spin_unlock_irqrestore(&head->vm_lock, flags);
- kfree(new);
- out:
- return NULL;
-}
-
-static struct arm_vmregion *__arm_vmregion_find(struct arm_vmregion_head *head, unsigned long addr)
-{
- struct arm_vmregion *c;
-
- list_for_each_entry(c, &head->vm_list, vm_list) {
- if (c->vm_active && c->vm_start == addr)
- goto out;
- }
- c = NULL;
- out:
- return c;
-}
-
-struct arm_vmregion *arm_vmregion_find(struct arm_vmregion_head *head, unsigned long addr)
-{
- struct arm_vmregion *c;
- unsigned long flags;
-
- spin_lock_irqsave(&head->vm_lock, flags);
- c = __arm_vmregion_find(head, addr);
- spin_unlock_irqrestore(&head->vm_lock, flags);
- return c;
-}
-
-struct arm_vmregion *arm_vmregion_find_remove(struct arm_vmregion_head *head, unsigned long addr)
-{
- struct arm_vmregion *c;
- unsigned long flags;
-
- spin_lock_irqsave(&head->vm_lock, flags);
- c = __arm_vmregion_find(head, addr);
- if (c)
- c->vm_active = 0;
- spin_unlock_irqrestore(&head->vm_lock, flags);
- return c;
-}
-
-void arm_vmregion_free(struct arm_vmregion_head *head, struct arm_vmregion *c)
-{
- unsigned long flags;
-
- spin_lock_irqsave(&head->vm_lock, flags);
- list_del(&c->vm_list);
- spin_unlock_irqrestore(&head->vm_lock, flags);
-
- kfree(c);
-}
-
-#ifdef CONFIG_PROC_FS
-static int arm_vmregion_show(struct seq_file *m, void *p)
-{
- struct arm_vmregion *c = list_entry(p, struct arm_vmregion, vm_list);
-
- seq_printf(m, "0x%08lx-0x%08lx %7lu", c->vm_start, c->vm_end,
- c->vm_end - c->vm_start);
- if (c->caller)
- seq_printf(m, " %pS", (void *)c->caller);
- seq_putc(m, '\n');
- return 0;
-}
-
-static void *arm_vmregion_start(struct seq_file *m, loff_t *pos)
-{
- struct arm_vmregion_head *h = m->private;
- spin_lock_irq(&h->vm_lock);
- return seq_list_start(&h->vm_list, *pos);
-}
-
-static void *arm_vmregion_next(struct seq_file *m, void *p, loff_t *pos)
-{
- struct arm_vmregion_head *h = m->private;
- return seq_list_next(p, &h->vm_list, pos);
-}
-
-static void arm_vmregion_stop(struct seq_file *m, void *p)
-{
- struct arm_vmregion_head *h = m->private;
- spin_unlock_irq(&h->vm_lock);
-}
-
-static const struct seq_operations arm_vmregion_ops = {
- .start = arm_vmregion_start,
- .stop = arm_vmregion_stop,
- .next = arm_vmregion_next,
- .show = arm_vmregion_show,
-};
-
-static int arm_vmregion_open(struct inode *inode, struct file *file)
-{
- struct arm_vmregion_head *h = PDE(inode)->data;
- int ret = seq_open(file, &arm_vmregion_ops);
- if (!ret) {
- struct seq_file *m = file->private_data;
- m->private = h;
- }
- return ret;
-}
-
-static const struct file_operations arm_vmregion_fops = {
- .open = arm_vmregion_open,
- .read = seq_read,
- .llseek = seq_lseek,
- .release = seq_release,
-};
-
-int arm_vmregion_create_proc(const char *path, struct arm_vmregion_head *h)
-{
- proc_create_data(path, S_IRUSR, NULL, &arm_vmregion_fops, h);
- return 0;
-}
-#else
-int arm_vmregion_create_proc(const char *path, struct arm_vmregion_head *h)
-{
- return 0;
-}
-#endif
diff --git a/arch/arm/mm/vmregion.h b/arch/arm/mm/vmregion.h
deleted file mode 100644
index 0f5a5f2..0000000
--- a/arch/arm/mm/vmregion.h
+++ /dev/null
@@ -1,31 +0,0 @@
-#ifndef VMREGION_H
-#define VMREGION_H
-
-#include <linux/spinlock.h>
-#include <linux/list.h>
-
-struct page;
-
-struct arm_vmregion_head {
- spinlock_t vm_lock;
- struct list_head vm_list;
- unsigned long vm_start;
- unsigned long vm_end;
-};
-
-struct arm_vmregion {
- struct list_head vm_list;
- unsigned long vm_start;
- unsigned long vm_end;
- int vm_active;
- const void *caller;
-};
-
-struct arm_vmregion *arm_vmregion_alloc(struct arm_vmregion_head *, size_t, size_t, gfp_t, const void *);
-struct arm_vmregion *arm_vmregion_find(struct arm_vmregion_head *, unsigned long);
-struct arm_vmregion *arm_vmregion_find_remove(struct arm_vmregion_head *, unsigned long);
-void arm_vmregion_free(struct arm_vmregion_head *, struct arm_vmregion *);
-
-int arm_vmregion_create_proc(const char *, struct arm_vmregion_head *);
-
-#endif
--
1.7.9.5
--
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