The patch titled
Generic ioremap_page_range: flush_cache_vmap
has been added to the -mm tree. Its filename is
generic-ioremap_page_range-flush_cache_vmap.patch
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: Generic ioremap_page_range: flush_cache_vmap
From: Haavard Skinnemoen <hskinnemoen@xxxxxxxxx>
The existing implementation of ioremap_page_range(), which was taken
from i386, does this:
flush_cache_all();
/* modify page tables */
flush_tlb_all();
I think this is a bit defensive, so this patch changes the generic
implementation to do:
/* modify page tables */
flush_cache_vmap(start, end);
instead, which is similar to what vmalloc() does. This should still
be correct because we never modify existing PTEs. According to
James Bottomley:
The problem the flush_tlb_all() is trying to solve is to avoid stale tlb
entries in the ioremap area. We're just being conservative by flushing
on both map and unmap. Technically what vmalloc/vfree does (only flush
the tlb on unmap) is just fine because it means that the only tlb
entries in the remap area must belong to in-use mappings.
Signed-off-by: Haavard Skinnemoen <hskinnemoen@xxxxxxxxx>
Cc: Richard Henderson <rth@xxxxxxxxxxx>
Cc: Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>
Cc: Russell King <rmk@xxxxxxxxxxxxxxxx>
Cc: Mikael Starvik <starvik@xxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Cc: <linux-m32r@xxxxxxxxxxxxxxxxx>
Cc: Ralf Baechle <ralf@xxxxxxxxxxxxxx>
Cc: Kyle McMartin <kyle@xxxxxxxxxxxxxxxx>
Cc: Martin Schwidefsky <schwidefsky@xxxxxxxxxx>
Cc: Paul Mundt <lethal@xxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxx>
---
lib/ioremap.c | 4 +---
1 files changed, 1 insertion(+), 3 deletions(-)
diff -puN lib/ioremap.c~generic-ioremap_page_range-flush_cache_vmap lib/ioremap.c
--- a/lib/ioremap.c~generic-ioremap_page_range-flush_cache_vmap
+++ a/lib/ioremap.c
@@ -75,8 +75,6 @@ int ioremap_page_range(unsigned long add
BUG_ON(addr >= end);
- flush_cache_all();
-
start = addr;
phys_addr -= addr;
pgd = pgd_offset_k(addr);
@@ -87,7 +85,7 @@ int ioremap_page_range(unsigned long add
break;
} while (pgd++, addr = next, addr != end);
- flush_tlb_all();
+ flush_cache_vmap(start, end);
return err;
}
_
Patches currently in -mm which might be from hskinnemoen@xxxxxxxxx are
avr32-arch.patch
avr32-config_debug_bugverbose-and-config_frame_pointer.patch
avr32-fix-invalid-constraints-for-stcond.patch
avr32-add-support-for-irq-flags-state-tracing.patch
avr32-turn-off-support-for-discontigmem-and-sparsemem.patch
avr32-always-enable-config_embedded.patch
avr32-export-the-find__bit-functions.patch
avr32-add-defconfig-for-at32stk1002.patch
avr32-use-autoconf-instead-of-marker.patch
avr32-dont-assume-anything-about-max_nr_zones.patch
avr32-add-i-o-port-access-primitives.patch
avr32-use-linux-pfnh.patch
avr32-kill-config_discontigmem-support-completely.patch
avr32-fix-bug-in-__avr32_asr64.patch
avr32-switch-to-generic-timekeeping-framework.patch
generic-ioremap_page_range-implementation.patch
generic-ioremap_page_range-flush_cache_vmap.patch
generic-ioremap_page_range-alpha-conversion.patch
generic-ioremap_page_range-arm-conversion.patch
generic-ioremap_page_range-avr32-conversion.patch
generic-ioremap_page_range-cris-conversion.patch
generic-ioremap_page_range-i386-conversion.patch
generic-ioremap_page_range-m32r-conversion.patch
generic-ioremap_page_range-mips-conversion.patch
generic-ioremap_page_range-parisc-conversion.patch
generic-ioremap_page_range-s390-conversion.patch
generic-ioremap_page_range-sh-conversion.patch
generic-ioremap_page_range-sh64-conversion.patch
generic-ioremap_page_range-x86_64-conversion.patch
namespaces-add-nsproxy-avr32-fix.patch
-
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