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authorLinus Torvalds <torvalds@linux-foundation.org>2008-08-12 08:40:19 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-08-12 08:40:19 -0700
commit1c89ac55017f982355c7761e1c912c88c941483d (patch)
tree6878e95a0572defc725ea58f5a1449db937a5066 /mm
parent88fa08f67bee1a0c765237bdac106a32872f57d2 (diff)
parentb1b135c8d619cb2c7045d6ee4e48375882518bb5 (diff)
Merge git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus
* git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux-2.6-for-linus: fix spinlock recursion in hvc_console stop_machine: remove unused variable modules: extend initcall_debug functionality to the module loader export virtio_rng.h lguest: use get_user_pages_fast() instead of get_user_pages() mm: Make generic weak get_user_pages_fast and EXPORT_GPL it lguest: don't set MAC address for guest unless specified
Diffstat (limited to 'mm')
-rw-r--r--mm/Kconfig3
-rw-r--r--mm/util.c15
2 files changed, 15 insertions, 3 deletions
diff --git a/mm/Kconfig b/mm/Kconfig
index 446c6588c753..0bd9c2dbb2a0 100644
--- a/mm/Kconfig
+++ b/mm/Kconfig
@@ -77,9 +77,6 @@ config FLAT_NODE_MEM_MAP
def_bool y
depends on !SPARSEMEM
-config HAVE_GET_USER_PAGES_FAST
- bool
-
#
# Both the NUMA code and DISCONTIGMEM use arrays of pg_data_t's
# to represent different areas of memory. This variable allows
diff --git a/mm/util.c b/mm/util.c
index 9341ca77bd88..cb00b748ce47 100644
--- a/mm/util.c
+++ b/mm/util.c
@@ -171,3 +171,18 @@ void arch_pick_mmap_layout(struct mm_struct *mm)
mm->unmap_area = arch_unmap_area;
}
#endif
+
+int __attribute__((weak)) get_user_pages_fast(unsigned long start,
+ int nr_pages, int write, struct page **pages)
+{
+ struct mm_struct *mm = current->mm;
+ int ret;
+
+ down_read(&mm->mmap_sem);
+ ret = get_user_pages(current, mm, start, nr_pages,
+ write, 0, pages, NULL);
+ up_read(&mm->mmap_sem);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(get_user_pages_fast);