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| author | Rusty Russell <rusty@rustcorp.com.au> | 2008-08-12 17:52:52 -0500 |
|---|---|---|
| committer | Rusty Russell <rusty@rustcorp.com.au> | 2008-08-12 17:52:53 +1000 |
| commit | 912985dce45ef18fcdd9f5439fef054e0e22302a (patch) | |
| tree | 394b3be51134bddef200f86dde48aa3e3c7ae94c /mm | |
| parent | 40c42076ebd362dc69210cccea101ac80b6d4bd4 (diff) | |
| download | kernel-crypto-912985dce45ef18fcdd9f5439fef054e0e22302a.tar.gz kernel-crypto-912985dce45ef18fcdd9f5439fef054e0e22302a.tar.xz kernel-crypto-912985dce45ef18fcdd9f5439fef054e0e22302a.zip | |
mm: Make generic weak get_user_pages_fast and EXPORT_GPL it
Out of line get_user_pages_fast fallback implementation, make it a weak
symbol, get rid of CONFIG_HAVE_GET_USER_PAGES_FAST.
Export the symbol to modules so lguest can use it.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/Kconfig | 3 | ||||
| -rw-r--r-- | mm/util.c | 15 |
2 files changed, 15 insertions, 3 deletions
diff --git a/mm/Kconfig b/mm/Kconfig index 446c6588c75..0bd9c2dbb2a 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 9341ca77bd8..cb00b748ce4 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); |