diff options
| author | Geert Uytterhoeven <geert@linux-m68k.org> | 2013-06-25 20:33:44 +0200 |
|---|---|---|
| committer | Geert Uytterhoeven <geert@linux-m68k.org> | 2013-11-26 11:08:59 +0100 |
| commit | 7b3e8de9b3e9c0ffd5cb1600e6075bede4272868 (patch) | |
| tree | fda9c0cccaaa02498e675a1b8188a50a10ee604c /arch | |
| parent | a4df02a217e9787a4b967197d9d9030c3e3c1088 (diff) | |
| download | linux-7b3e8de9b3e9c0ffd5cb1600e6075bede4272868.tar.bz2 | |
m68k/sun3: Dynamically allocate the table to track IOMMU use
As Sun 3 kernels cannot be multi-platform due to the different Sun 3 MMU
type, it made sense to statically allocate the table to track IOMMU use.
However, Sun 3x kernels can be multi-platform. Furthermore, Sun 3x uses
a larger table than Sun 3 (8192 bytes instead of 512 bytes).
Hence switch to dynamic allocation of this table using the bootmem
allocator to avoid wasting 8192 bytes when not running on a Sun 3x.
As this allocator returns zeroed memory, there's no need to explicitly
initialize the table to zeroes.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch')
| -rw-r--r-- | arch/m68k/sun3/sun3dvma.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/m68k/sun3/sun3dvma.c b/arch/m68k/sun3/sun3dvma.c index ca57966ec3a2..b37521a5259d 100644 --- a/arch/m68k/sun3/sun3dvma.c +++ b/arch/m68k/sun3/sun3dvma.c @@ -6,6 +6,7 @@ * Contains common routines for sun3/sun3x DVMA management. */ +#include <linux/bootmem.h> #include <linux/init.h> #include <linux/module.h> #include <linux/kernel.h> @@ -31,7 +32,7 @@ static inline void dvma_unmap_iommu(unsigned long a, int b) extern void sun3_dvma_init(void); #endif -static unsigned long iommu_use[IOMMU_TOTAL_ENTRIES]; +static unsigned long *iommu_use; #define dvma_index(baddr) ((baddr - DVMA_START) >> DVMA_PAGE_SHIFT) @@ -266,7 +267,7 @@ void __init dvma_init(void) list_add(&(hole->list), &hole_list); - memset(iommu_use, 0, sizeof(iommu_use)); + iommu_use = alloc_bootmem(IOMMU_TOTAL_ENTRIES * sizeof(unsigned long)); dvma_unmap_iommu(DVMA_START, DVMA_SIZE); |