recalculating offset on each iteration is pointless - on all subsequent
passes through the loop it will be zero anyway.
Signed-off-by: Al Viro <viro@xxxxxxxxxxxxxxxxxx>
---
lib/iov_iter.c | 6 +++---
1 file changed, 3 insertions(+), 3 deletions(-)
diff --git a/lib/iov_iter.c b/lib/iov_iter.c
index c1580e574d76..9ecbf59c3378 100644
--- a/lib/iov_iter.c
+++ b/lib/iov_iter.c
@@ -70,9 +70,9 @@
__label__ __out; \
size_t __off = 0; \
struct page *head = NULL; \
- size_t offset; \
loff_t start = i->xarray_start + i->iov_offset; \
- pgoff_t index = start >> PAGE_SHIFT; \
+ unsigned offset = start % PAGE_SIZE; \
+ pgoff_t index = start / PAGE_SIZE; \
int j; \
\
XA_STATE(xas, i->xarray, index); \
@@ -89,7 +89,6 @@
for (j = (head->index < index) ? index - head->index : 0; \
j < thp_nr_pages(head); j++) { \
void *kaddr = kmap_local_page(head + j); \
- offset = (start + __off) % PAGE_SIZE; \
base = kaddr + offset; \
len = PAGE_SIZE - offset; \
len = min(n, len); \
@@ -100,6 +99,7 @@
n -= len; \
if (left || n == 0) \
goto __out; \
+ offset = 0; \
} \
} \
__out: \
--
2.11.0
