Commit 99ec28f1 authored by FUJITA Tomonori's avatar FUJITA Tomonori Committed by Benjamin Herrenschmidt
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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 commit
56997559).

In 2008, the IOMMU was fixed to use the boundary_mask parameter per
device properly. So 'protect4gb' workaround was removed (the
383af952). But somehow I messed the
'protect4gb' boot parameter that was used to enable the
workaround.

Signed-off-by: default avatarFUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Signed-off-by: default avatarBenjamin Herrenschmidt <benh@kernel.crashing.org>
parent 40a5a443

arch/powerpc/kernel/iommu.c

+0 −12
Original line number Diff line number Diff line
@@ -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,