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powerpc: Remove unused 'protect4gb' boot parameter
'protect4gb' boot parameter was introduced to avoid allocating dma space acrossing 4GB boundary in 2007 (the commit569975591c
). In 2008, the IOMMU was fixed to use the boundary_mask parameter per device properly. So 'protect4gb' workaround was removed (the383af9525b
). 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>
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1 changed files with 0 additions and 12 deletions
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@ -43,20 +43,9 @@
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#define DBG(...)
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static int novmerge;
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static int protect4gb = 1;
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static void __iommu_free(struct iommu_table *, dma_addr_t, unsigned int);
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static int __init setup_protect4gb(char *str)
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{
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if (strcmp(str, "on") == 0)
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protect4gb = 1;
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else if (strcmp(str, "off") == 0)
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protect4gb = 0;
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return 1;
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}
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static int __init setup_iommu(char *str)
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{
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if (!strcmp(str, "novmerge"))
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@ -66,7 +55,6 @@ static int __init setup_iommu(char *str)
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return 1;
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}
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__setup("protect4gb=", setup_protect4gb);
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__setup("iommu=", setup_iommu);
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static unsigned long iommu_range_alloc(struct device *dev,
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