From 7b3e8de9b3e9c0ffd5cb1600e6075bede4272868 Mon Sep 17 00:00:00 2001 From: Geert Uytterhoeven Date: Tue, 25 Jun 2013 20:33:44 +0200 Subject: 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 --- arch/m68k/sun3/sun3dvma.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) (limited to 'arch/m68k/sun3') 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 #include #include #include @@ -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); -- cgit v1.2.3