Hi Andrew, After merging the akpm-current tree, today's linux-next build (powerpc ppc64_defconfig) failed like this: mm/fremap.c: In function 'SYSC_remap_file_pages': mm/fremap.c:241:22: error: 'struct address_space' has no member named 'i_mmap_mutex' mutex_lock(&mapping->i_mmap_mutex); ^ mm/fremap.c:247:24: error: 'struct address_space' has no member named 'i_mmap_mutex' mutex_unlock(&mapping->i_mmap_mutex); ^ Caused by commit 1f8c97e79f66 ("mm: convert i_mmap_mutex to rwsem"). I applied this patch for today (not sure if there is a better way): From: Stephen Rothwell Date: Thu, 6 Nov 2014 16:26:41 +1100 Subject: [PATCH] mm: convert i_mmap_mutex to rwsem fix Signed-off-by: Stephen Rothwell --- mm/fremap.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/fremap.c b/mm/fremap.c index 9129013732d7..2805d71cf476 100644 --- a/mm/fremap.c +++ b/mm/fremap.c @@ -238,13 +238,13 @@ get_write_lock: } goto out_freed; } - mutex_lock(&mapping->i_mmap_mutex); + i_mmap_lock_write(mapping); flush_dcache_mmap_lock(mapping); vma->vm_flags |= VM_NONLINEAR; vma_interval_tree_remove(vma, &mapping->i_mmap); vma_nonlinear_insert(vma, &mapping->i_mmap_nonlinear); flush_dcache_mmap_unlock(mapping); - mutex_unlock(&mapping->i_mmap_mutex); + i_mmap_unlock_write(mapping); } if (vma->vm_flags & VM_LOCKED) { -- 2.1.1 -- Cheers, Stephen Rothwell sfr@canb.auug.org.au