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iomap: Switch to offset_in_page for clarity 

Instead of open-coding pos & (PAGE_SIZE - 1) and pos & ~PAGE_MASK, use
the offset_in_page macro.

Signed-off-by: Andreas Gruenbacher <agruenba@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>
This commit is contained in:
Andreas Gruenbacher 2018-08-10 11:46:14 -07:00 committed by Darrick J. Wong
parent e25ff835af
commit 10259de1d8
1 changed files with 10 additions and 10 deletions
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20
fs/iomap.c
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@ -145,11 +145,11 @@ iomap_adjust_read_range(struct inode *inode, struct iomap_page *iop,
{
unsigned block_bits = inode->i_blkbits;
unsigned block_size = (1 << block_bits);
unsigned poff = *pos & (PAGE_SIZE - 1);
unsigned poff = offset_in_page(*pos);
unsigned plen = min_t(loff_t, PAGE_SIZE - poff, length);
unsigned first = poff >> block_bits;
unsigned last = (poff + plen - 1) >> block_bits;
unsigned end = (i_size_read(inode) & (PAGE_SIZE - 1)) >> block_bits;
unsigned end = offset_in_page(i_size_read(inode)) >> block_bits;
/*
* If the block size is smaller than the page size we need to check the
@ -427,7 +427,7 @@ iomap_readpages_actor(struct inode *inode, loff_t pos, loff_t length,
loff_t done, ret;
for (done = 0; done < length; done += ret) {
if (ctx->cur_page && ((pos + done) & (PAGE_SIZE - 1)) == 0) {
if (ctx->cur_page && offset_in_page(pos + done) == 0) {
if (!ctx->cur_page_in_bio)
unlock_page(ctx->cur_page);
put_page(ctx->cur_page);
@ -609,7 +609,7 @@ __iomap_write_begin(struct inode *inode, loff_t pos, unsigned len,
loff_t block_size = i_blocksize(inode);
loff_t block_start = pos & ~(block_size - 1);
loff_t block_end = (pos + len + block_size - 1) & ~(block_size - 1);
unsigned from = pos & (PAGE_SIZE - 1), to = from + len, poff, plen;
unsigned from = offset_in_page(pos), to = from + len, poff, plen;
int status = 0;
if (PageUptodate(page))
@ -714,7 +714,7 @@ __iomap_write_end(struct inode *inode, loff_t pos, unsigned len,
if (unlikely(copied < len && !PageUptodate(page))) {
copied = 0;
} else {
iomap_set_range_uptodate(page, pos & (PAGE_SIZE - 1), len);
iomap_set_range_uptodate(page, offset_in_page(pos), len);
iomap_set_page_dirty(page);
}
return __generic_write_end(inode, pos, copied, page);
@ -776,7 +776,7 @@ iomap_write_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
unsigned long bytes; /* Bytes to write to page */
size_t copied; /* Bytes copied from user */
offset = (pos & (PAGE_SIZE - 1));
offset = offset_in_page(pos);
bytes = min_t(unsigned long, PAGE_SIZE - offset,
iov_iter_count(i));
again:
@ -890,7 +890,7 @@ iomap_dirty_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
unsigned long offset; /* Offset into pagecache page */
unsigned long bytes; /* Bytes to write to page */
offset = (pos & (PAGE_SIZE - 1));
offset = offset_in_page(pos);
bytes = min_t(loff_t, PAGE_SIZE - offset, length);
rpage = __iomap_read_page(inode, pos);
@ -982,7 +982,7 @@ iomap_zero_range_actor(struct inode *inode, loff_t pos, loff_t count,
do {
unsigned offset, bytes;
offset = pos & (PAGE_SIZE - 1); /* Within page */
offset = offset_in_page(pos);
bytes = min_t(loff_t, PAGE_SIZE - offset, count);
if (IS_DAX(inode))
@ -1075,7 +1075,7 @@ int iomap_page_mkwrite(struct vm_fault *vmf, const struct iomap_ops *ops)
/* page is wholly or partially inside EOF */
if (((page->index + 1) << PAGE_SHIFT) > size)
length = size & ~PAGE_MASK;
length = offset_in_page(size);
else
length = PAGE_SIZE;
@ -1238,7 +1238,7 @@ page_seek_hole_data(struct inode *inode, struct page *page, loff_t *lastoff,
goto out_unlock_not_found;
for (off = 0; off < PAGE_SIZE; off += bsize) {
if ((*lastoff & ~PAGE_MASK) >= off + bsize)
if (offset_in_page(*lastoff) >= off + bsize)
continue;
if (ops->is_partially_uptodate(page, off, bsize) == seek_data) {
unlock_page(page);