Commit 4221e2e6 authored by Liu Hua's avatar Liu Hua Committed by Russell King
Browse files

ARM: 8031/1: fixmap: remove FIX_KMAP_BEGIN and FIX_KMAP_END



It seems that these two macros are not used by non architecture
specific code. And on ARM FIX_KMAP_BEGIN equals zero.

This patch removes these two macros. Instead, using FIX_KMAP_NR_PTES to
tell the pte number belonged to fixmap mapping region. The code will
become clearer when I introduce a bugfix on fixmap mapping region.
Reviewed-by: default avatarNicolas Pitre <nico@linaro.org>
Signed-off-by: default avatarLiu Hua <sdu.liu@huawei.com>
Signed-off-by: default avatarRussell King <rmk+kernel@arm.linux.org.uk>
parent 16c79a37
......@@ -17,8 +17,7 @@
#define FIXADDR_TOP 0xfffe0000UL
#define FIXADDR_SIZE (FIXADDR_TOP - FIXADDR_START)
#define FIX_KMAP_BEGIN 0
#define FIX_KMAP_END (FIXADDR_SIZE >> PAGE_SHIFT)
#define FIX_KMAP_NR_PTES (FIXADDR_SIZE >> PAGE_SHIFT)
#define __fix_to_virt(x) (FIXADDR_START + ((x) << PAGE_SHIFT))
#define __virt_to_fix(x) (((x) - FIXADDR_START) >> PAGE_SHIFT)
......@@ -27,7 +26,7 @@ extern void __this_fixmap_does_not_exist(void);
static inline unsigned long fix_to_virt(const unsigned int idx)
{
if (idx >= FIX_KMAP_END)
if (idx >= FIX_KMAP_NR_PTES)
__this_fixmap_does_not_exist();
return __fix_to_virt(idx);
}
......
......@@ -63,7 +63,7 @@ void *kmap_atomic(struct page *page)
type = kmap_atomic_idx_push();
idx = type + KM_TYPE_NR * smp_processor_id();
vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
vaddr = __fix_to_virt(idx);
#ifdef CONFIG_DEBUG_HIGHMEM
/*
* With debugging enabled, kunmap_atomic forces that entry to 0.
......@@ -94,7 +94,7 @@ void __kunmap_atomic(void *kvaddr)
if (cache_is_vivt())
__cpuc_flush_dcache_area((void *)vaddr, PAGE_SIZE);
#ifdef CONFIG_DEBUG_HIGHMEM
BUG_ON(vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx));
BUG_ON(vaddr != __fix_to_virt(idx));
set_top_pte(vaddr, __pte(0));
#else
(void) idx; /* to kill a warning */
......@@ -117,7 +117,7 @@ void *kmap_atomic_pfn(unsigned long pfn)
type = kmap_atomic_idx_push();
idx = type + KM_TYPE_NR * smp_processor_id();
vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
vaddr = __fix_to_virt(idx);
#ifdef CONFIG_DEBUG_HIGHMEM
BUG_ON(!pte_none(get_top_pte(vaddr)));
#endif
......
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