The patch titled
get_unmapped_area handles MAP_FIXED in generic code
has been added to the -mm tree. Its filename is
get_unmapped_area-handles-map_fixed-in-generic-code.patch
*** Remember to use Documentation/SubmitChecklist when testing your code ***
See http://www.zip.com.au/~akpm/linux/patches/stuff/added-to-mm.txt to find
out what to do about this
------------------------------------------------------
Subject: get_unmapped_area handles MAP_FIXED in generic code
From: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
generic arch_get_unmapped_area() now handles MAP_FIXED. Now that all
implementations have been fixed, change the toplevel get_unmapped_area() to
call into arch or drivers for the MAP_FIXED case.
Signed-off-by: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Paul Mackerras <paulus@xxxxxxxxx>
Cc: Richard Henderson <rth@xxxxxxxxxxx>
Cc: Ivan Kokshaysky <ink@xxxxxxxxxxxxxxxxxxxx>
Cc: Russell King <rmk+kernel@xxxxxxxxxxxxxxxx>
Cc: David Howells <dhowells@xxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxx>
Cc: "Luck, Tony" <tony.luck@xxxxxxxxx>
Cc: Kyle McMartin <kyle@xxxxxxxxxxx>
Cc: Grant Grundler <grundler@xxxxxxxxxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxx>
Cc: "David S. Miller" <davem@xxxxxxxxxxxxx>
Cc: William Irwin <bill.irwin@xxxxxxxxxx>
Cc: Adam Litke <agl@xxxxxxxxxx>
Cc: David Gibson <david@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/mmap.c | 25 +++++++++++++++----------
1 file changed, 15 insertions(+), 10 deletions(-)
diff -puN mm/mmap.c~get_unmapped_area-handles-map_fixed-in-generic-code mm/mmap.c
--- a/mm/mmap.c~get_unmapped_area-handles-map_fixed-in-generic-code
+++ a/mm/mmap.c
@@ -1209,6 +1209,9 @@ arch_get_unmapped_area(struct file *filp
if (len > TASK_SIZE)
return -ENOMEM;
+ if (flags & MAP_FIXED)
+ return addr;
+
if (addr) {
addr = PAGE_ALIGN(addr);
vma = find_vma(mm, addr);
@@ -1282,6 +1285,9 @@ arch_get_unmapped_area_topdown(struct fi
if (len > TASK_SIZE)
return -ENOMEM;
+ if (flags & MAP_FIXED)
+ return addr;
+
/* requesting a specific address */
if (addr) {
addr = PAGE_ALIGN(addr);
@@ -1370,22 +1376,21 @@ get_unmapped_area(struct file *file, uns
unsigned long pgoff, unsigned long flags)
{
unsigned long ret;
+ unsigned long (*get_area)(struct file *, unsigned long,
+ unsigned long, unsigned long, unsigned long);
- if (!(flags & MAP_FIXED)) {
- unsigned long (*get_area)(struct file *, unsigned long, unsigned long, unsigned long, unsigned long);
-
- get_area = current->mm->get_unmapped_area;
- if (file && file->f_op && file->f_op->get_unmapped_area)
- get_area = file->f_op->get_unmapped_area;
- addr = get_area(file, addr, len, pgoff, flags);
- if (IS_ERR_VALUE(addr))
- return addr;
- }
+ get_area = current->mm->get_unmapped_area;
+ if (file && file->f_op && file->f_op->get_unmapped_area)
+ get_area = file->f_op->get_unmapped_area;
+ addr = get_area(file, addr, len, pgoff, flags);
+ if (IS_ERR_VALUE(addr))
+ return addr;
if (addr > TASK_SIZE - len)
return -ENOMEM;
if (addr & ~PAGE_MASK)
return -EINVAL;
+
if (file && is_file_hugepages(file)) {
/*
* Check if the given range is hugepage aligned, and
_
Patches currently in -mm which might be from benh@xxxxxxxxxxxxxxxxxxx are
git-powerpc.patch
git-powerpc-arch-powerpc-sysdev-timerc-build-fix.patch
ppc4xx_sgdma-needs-dma_mappingh.patch
powerpc-rtas-msi-support.patch
spin_lock_unlocked-cleanup-in-arch-powerpc.patch
macintosh-mediabay-convert-to-kthread-api.patch
macintosh-adb-convert-to-the-kthread-api.patch
macintosh-therm_pm72c-partially-convert-to-kthread-api.patch
s2ram-add-arch-irq-disable-enable-hooks.patch
fix-jdelvare-i2c-i2c-del-driver-returns-void-on-powerpc.patch
slub-core.patch
use-slab_panic-flag-cleanup.patch
get_unmapped_area-handles-map_fixed-on-powerpc.patch
get_unmapped_area-handles-map_fixed-on-alpha.patch
get_unmapped_area-handles-map_fixed-on-arm.patch
get_unmapped_area-handles-map_fixed-on-frv.patch
get_unmapped_area-handles-map_fixed-on-i386.patch
get_unmapped_area-handles-map_fixed-on-ia64.patch
get_unmapped_area-handles-map_fixed-on-parisc.patch
get_unmapped_area-handles-map_fixed-on-sparc64.patch
get_unmapped_area-handles-map_fixed-on-x86_64.patch
get_unmapped_area-handles-map_fixed-in-hugetlbfs.patch
get_unmapped_area-handles-map_fixed-in-generic-code.patch
get_unmapped_area-doesnt-need-hugetlbfs-hacks-anymore.patch
the-scheduled-removal-of-obsolete_oss-options.patch
drivers-macintosh-mac_hidc-make-code-static.patch
fixes-and-cleanups-for-earlyprintk-aka-boot-console.patch
parport-dev-driver-model-support-powerpc-fix.patch
atomich-add-atomic64-cmpxchg-xchg-and-add_unless-to-powerpc.patch
atomich-add-atomic64-cmpxchg-xchg-and-add_unless-to-powerpc-fix.patch
local_t-powerpc-extension.patch
linux-kernel-markers-powerpc-optimization.patch
ps3fb-thread-updates.patch
ps3av-thread-updates.patch
ps3fb-kill-superfluous-zero-initializations.patch
ps3av-misc-updates.patch
aty128fb-fix-blanking.patch
radeonfb-add-support-for-radeon-xpress-200m.patch
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