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authorKirill A. Shutemov <kirill.shutemov@linux.intel.com>2016-07-26 15:25:20 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2016-07-26 16:19:19 -0700
commitbae473a423f65e480db83c85b5e92254f6dfcb28 (patch)
tree9e09cd8cbcafdcc1a27298700f69f8f86f929392 /include/linux/userfaultfd_k.h
parentdcddffd41d3f1d3bdcc1dce3f1cd142779b6d4c1 (diff)
downloadop-kernel-dev-bae473a423f65e480db83c85b5e92254f6dfcb28.zip
op-kernel-dev-bae473a423f65e480db83c85b5e92254f6dfcb28.tar.gz
mm: introduce fault_env
The idea borrowed from Peter's patch from patchset on speculative page faults[1]: Instead of passing around the endless list of function arguments, replace the lot with a single structure so we can change context without endless function signature changes. The changes are mostly mechanical with exception of faultaround code: filemap_map_pages() got reworked a bit. This patch is preparation for the next one. [1] http://lkml.kernel.org/r/20141020222841.302891540@infradead.org Link: http://lkml.kernel.org/r/1466021202-61880-9-git-send-email-kirill.shutemov@linux.intel.com Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/linux/userfaultfd_k.h')
-rw-r--r--include/linux/userfaultfd_k.h8
1 files changed, 2 insertions, 6 deletions
diff --git a/include/linux/userfaultfd_k.h b/include/linux/userfaultfd_k.h
index 587480a..dd66a95 100644
--- a/include/linux/userfaultfd_k.h
+++ b/include/linux/userfaultfd_k.h
@@ -27,8 +27,7 @@
#define UFFD_SHARED_FCNTL_FLAGS (O_CLOEXEC | O_NONBLOCK)
#define UFFD_FLAGS_SET (EFD_SHARED_FCNTL_FLAGS)
-extern int handle_userfault(struct vm_area_struct *vma, unsigned long address,
- unsigned int flags, unsigned long reason);
+extern int handle_userfault(struct fault_env *fe, unsigned long reason);
extern ssize_t mcopy_atomic(struct mm_struct *dst_mm, unsigned long dst_start,
unsigned long src_start, unsigned long len);
@@ -56,10 +55,7 @@ static inline bool userfaultfd_armed(struct vm_area_struct *vma)
#else /* CONFIG_USERFAULTFD */
/* mm helpers */
-static inline int handle_userfault(struct vm_area_struct *vma,
- unsigned long address,
- unsigned int flags,
- unsigned long reason)
+static inline int handle_userfault(struct fault_env *fe, unsigned long reason)
{
return VM_FAULT_SIGBUS;
}
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