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Subject[PATCH RFC] ARM: mm: Fix for highmem on machines with more than 14 cores
Date
The fixmap area was hard coded to 224 pages which was only enough for 14 CPU:s.
Now the area adapts to the configured number of CPU:s (NR_CPUS). We still have
a hard limit of 30 CPU:s since we only have a single pte-chunk (512 pte:s).

Signed-off-by: Anders Berg <anders.berg@lsi.com>
Signed-off-by: Fredrik Markström <fredrik.markstrom@gmail.com>
---
arch/arm/include/asm/fixmap.h | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm/include/asm/fixmap.h b/arch/arm/include/asm/fixmap.h
index bbae919..40f1f05 100644
--- a/arch/arm/include/asm/fixmap.h
+++ b/arch/arm/include/asm/fixmap.h
@@ -7,15 +7,15 @@
* On ARM we already have well known fixed virtual addresses imposed by
* the architecture such as the vector page which is located at 0xffff0000,
* therefore a second level page table is already allocated covering
- * 0xfff00000 upwards.
+ * 0xffe00000 upwards.
*
* The cache flushing code in proc-xscale.S uses the virtual area between
* 0xfffe0000 and 0xfffeffff.
*/

-#define FIXADDR_START 0xfff00000UL
+#define FIXADDR_SIZE ((KM_TYPE_NR * NR_CPUS) << PAGE_SHIFT)
#define FIXADDR_TOP 0xfffe0000UL
-#define FIXADDR_SIZE (FIXADDR_TOP - FIXADDR_START)
+#define FIXADDR_START (FIXADDR_TOP - FIXADDR_SIZE)

#define FIX_KMAP_BEGIN 0
#define FIX_KMAP_END (FIXADDR_SIZE >> PAGE_SHIFT)
--
1.8.3.2
--
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