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authorPaul Mundt <lethal@linux-sh.org>2010-01-19 09:22:52 +0300
committerPaul Mundt <lethal@linux-sh.org>2010-01-19 09:22:52 +0300
commitcb6d04468d16de5a6161167ec7e76a43be540a80 (patch)
tree9098a291898ebf38400da16617c141217b3f1e64
parentbb29c677b366fdf4f6522cd82228a32567aa98c7 (diff)
downloadlinux-cb6d04468d16de5a6161167ec7e76a43be540a80.tar.xz
sh: Kill off now bogus fixmap/page wiring documentation.
The plans for _PAGE_WIRED were detailed in a comment with the fixmap code, but as it's now all taken care of, we no longer have any reason for keeping it around, particularly since it's no longer accurate. Kill it off. Signed-off-by: Paul Mundt <lethal@linux-sh.org>
-rw-r--r--arch/sh/mm/init.c15
1 files changed, 0 insertions, 15 deletions
diff --git a/arch/sh/mm/init.c b/arch/sh/mm/init.c
index fe578a286fdd..32ebd1592e63 100644
--- a/arch/sh/mm/init.c
+++ b/arch/sh/mm/init.c
@@ -98,21 +98,6 @@ static void clear_pte_phys(unsigned long addr, pgprot_t prot)
local_flush_tlb_one(get_asid(), addr);
}
-/*
- * As a performance optimization, other platforms preserve the fixmap mapping
- * across a context switch, we don't presently do this, but this could be done
- * in a similar fashion as to the wired TLB interface that sh64 uses (by way
- * of the memory mapped UTLB configuration) -- this unfortunately forces us to
- * give up a TLB entry for each mapping we want to preserve. While this may be
- * viable for a small number of fixmaps, it's not particularly useful for
- * everything and needs to be carefully evaluated. (ie, we may want this for
- * the vsyscall page).
- *
- * XXX: Perhaps add a _PAGE_WIRED flag or something similar that we can pass
- * in at __set_fixmap() time to determine the appropriate behavior to follow.
- *
- * -- PFM.
- */
void __set_fixmap(enum fixed_addresses idx, unsigned long phys, pgprot_t prot)
{
unsigned long address = __fix_to_virt(idx);