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powerpc: Remove unused 'protect4gb' boot parameter

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'protect4gb' boot parameter was introduced to avoid allocating dma
space acrossing 4GB boundary in 2007 (the commit
569975591c5530fdc9c7a3c45122e5e46f075a74).

In 2008, the IOMMU was fixed to use the boundary_mask parameter per
device properly. So 'protect4gb' workaround was removed (the
383af9525bb27f927511874f6306247ec13f1c28). But somehow I messed the
'protect4gb' boot parameter that was used to enable the
workaround.

Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
FUJITA Tomonori 2010-05-09 17:39:05 +00:00 committed by Benjamin Herrenschmidt
parent 40a5a4435f
commit 99ec28f183
1 changed files with 0 additions and 12 deletions
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12
arch/powerpc/kernel/iommu.c
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@ -43,20 +43,9 @@
#define DBG(...)
static int novmerge;
static int protect4gb = 1;
static void __iommu_free(struct iommu_table *, dma_addr_t, unsigned int);
static int __init setup_protect4gb(char *str)
{
if (strcmp(str, "on") == 0)
protect4gb = 1;
else if (strcmp(str, "off") == 0)
protect4gb = 0;
return 1;
}
static int __init setup_iommu(char *str)
{
if (!strcmp(str, "novmerge"))
@ -66,7 +55,6 @@ static int __init setup_iommu(char *str)
return 1;
}
__setup("protect4gb=", setup_protect4gb);
__setup("iommu=", setup_iommu);
static unsigned long iommu_range_alloc(struct device *dev,