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authorChristoph Hellwig <hch@lst.de>2019-08-13 08:14:41 +0200
committerChristoph Hellwig <hch@lst.de>2019-11-11 21:18:19 +0100
commit076863473c0cdbf7fdcbf97e1878028ccde3b4ec (patch)
tree41f69c7f4a38cd5336bab8a793767a660409a06f /arch/m68k/mm
parentd092a87073269677b7ff09e71a8d91912b7f969a (diff)
m68k: rename __iounmap and mark it static
m68k uses __iounmap as the name for an internal helper that is only used for some CPU types. Mark it static, give it a better name and move it around a bit to avoid a forward declaration. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Geert Uytterhoeven <geert@linux-m68k.org> Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k/mm')
-rw-r--r--arch/m68k/mm/kmap.c100
1 files changed, 50 insertions, 50 deletions
diff --git a/arch/m68k/mm/kmap.c b/arch/m68k/mm/kmap.c
index 40a3b327da07..23f9466aabb5 100644
--- a/arch/m68k/mm/kmap.c
+++ b/arch/m68k/mm/kmap.c
@@ -54,6 +54,55 @@ static inline void free_io_area(void *addr)
static struct vm_struct *iolist;
+/*
+ * __free_io_area unmaps nearly everything, so be careful
+ * Currently it doesn't free pointer/page tables anymore but this
+ * wasn't used anyway and might be added later.
+ */
+static void __free_io_area(void *addr, unsigned long size)
+{
+ unsigned long virtaddr = (unsigned long)addr;
+ pgd_t *pgd_dir;
+ pmd_t *pmd_dir;
+ pte_t *pte_dir;
+
+ while ((long)size > 0) {
+ pgd_dir = pgd_offset_k(virtaddr);
+ if (pgd_bad(*pgd_dir)) {
+ printk("iounmap: bad pgd(%08lx)\n", pgd_val(*pgd_dir));
+ pgd_clear(pgd_dir);
+ return;
+ }
+ pmd_dir = pmd_offset(pgd_dir, virtaddr);
+
+ if (CPU_IS_020_OR_030) {
+ int pmd_off = (virtaddr/PTRTREESIZE) & 15;
+ int pmd_type = pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK;
+
+ if (pmd_type == _PAGE_PRESENT) {
+ pmd_dir->pmd[pmd_off] = 0;
+ virtaddr += PTRTREESIZE;
+ size -= PTRTREESIZE;
+ continue;
+ } else if (pmd_type == 0)
+ continue;
+ }
+
+ if (pmd_bad(*pmd_dir)) {
+ printk("iounmap: bad pmd (%08lx)\n", pmd_val(*pmd_dir));
+ pmd_clear(pmd_dir);
+ return;
+ }
+ pte_dir = pte_offset_kernel(pmd_dir, virtaddr);
+
+ pte_val(*pte_dir) = 0;
+ virtaddr += PAGE_SIZE;
+ size -= PAGE_SIZE;
+ }
+
+ flush_tlb_all();
+}
+
static struct vm_struct *get_io_area(unsigned long size)
{
unsigned long addr;
@@ -90,7 +139,7 @@ static inline void free_io_area(void *addr)
if (tmp->addr == addr) {
*p = tmp->next;
/* remove gap added in get_io_area() */
- __iounmap(tmp->addr, tmp->size - IO_SIZE);
+ __free_io_area(tmp->addr, tmp->size - IO_SIZE);
kfree(tmp);
return;
}
@@ -250,55 +299,6 @@ void iounmap(void __iomem *addr)
EXPORT_SYMBOL(iounmap);
/*
- * __iounmap unmaps nearly everything, so be careful
- * Currently it doesn't free pointer/page tables anymore but this
- * wasn't used anyway and might be added later.
- */
-void __iounmap(void *addr, unsigned long size)
-{
- unsigned long virtaddr = (unsigned long)addr;
- pgd_t *pgd_dir;
- pmd_t *pmd_dir;
- pte_t *pte_dir;
-
- while ((long)size > 0) {
- pgd_dir = pgd_offset_k(virtaddr);
- if (pgd_bad(*pgd_dir)) {
- printk("iounmap: bad pgd(%08lx)\n", pgd_val(*pgd_dir));
- pgd_clear(pgd_dir);
- return;
- }
- pmd_dir = pmd_offset(pgd_dir, virtaddr);
-
- if (CPU_IS_020_OR_030) {
- int pmd_off = (virtaddr/PTRTREESIZE) & 15;
- int pmd_type = pmd_dir->pmd[pmd_off] & _DESCTYPE_MASK;
-
- if (pmd_type == _PAGE_PRESENT) {
- pmd_dir->pmd[pmd_off] = 0;
- virtaddr += PTRTREESIZE;
- size -= PTRTREESIZE;
- continue;
- } else if (pmd_type == 0)
- continue;
- }
-
- if (pmd_bad(*pmd_dir)) {
- printk("iounmap: bad pmd (%08lx)\n", pmd_val(*pmd_dir));
- pmd_clear(pmd_dir);
- return;
- }
- pte_dir = pte_offset_kernel(pmd_dir, virtaddr);
-
- pte_val(*pte_dir) = 0;
- virtaddr += PAGE_SIZE;
- size -= PAGE_SIZE;
- }
-
- flush_tlb_all();
-}
-
-/*
* Set new cache mode for some kernel address space.
* The caller must push data for that range itself, if such data may already
* be in the cache.