From d746e2ea0e7a564888f078fc96a280ff85d0e6dd Mon Sep 17 00:00:00 2001 From: Brian Behlendorf Date: Tue, 5 Apr 2016 12:39:37 -0700 Subject: [PATCH] Linux 4.6 compat: PAGE_CACHE_SIZE removal As described in torvalds/linux@4a2d057e the macros PAGE_CACHE_{SIZE,SHIFT,MASK,ALIGN} macros were originally introduced to make it possible to add bigger chunks to the page cache. This never panned out and it has therefore been removed from the kernel. ZFS has been updated to use the PAGE_{SIZE,SHIFT,MASK,ALIGN} macros and calls to page_cache_release() have been replaced with put_page(). There was no need to introduce a configure check for this because these interfaces have existed for a very long time. Signed-off-by: Brian Behlendorf Signed-off-by: Chunwei Chen Closes #4489 --- module/zfs/zfs_vnops.c | 28 ++++++++++++++-------------- module/zfs/zfs_znode.c | 19 +++++++++---------- 2 files changed, 23 insertions(+), 24 deletions(-) diff --git a/module/zfs/zfs_vnops.c b/module/zfs/zfs_vnops.c index 944f0ad3dd..43c3a3c204 100644 --- a/module/zfs/zfs_vnops.c +++ b/module/zfs/zfs_vnops.c @@ -332,11 +332,11 @@ update_pages(struct inode *ip, int64_t start, int len, int64_t off; void *pb; - off = start & (PAGE_CACHE_SIZE-1); - for (start &= PAGE_CACHE_MASK; len > 0; start += PAGE_CACHE_SIZE) { - nbytes = MIN(PAGE_CACHE_SIZE - off, len); + off = start & (PAGE_SIZE-1); + for (start &= PAGE_MASK; len > 0; start += PAGE_SIZE) { + nbytes = MIN(PAGE_SIZE - off, len); - pp = find_lock_page(mp, start >> PAGE_CACHE_SHIFT); + pp = find_lock_page(mp, start >> PAGE_SHIFT); if (pp) { if (mapping_writably_mapped(mp)) flush_dcache_page(pp); @@ -353,7 +353,7 @@ update_pages(struct inode *ip, int64_t start, int len, SetPageUptodate(pp); ClearPageError(pp); unlock_page(pp); - page_cache_release(pp); + put_page(pp); } len -= nbytes; @@ -384,11 +384,11 @@ mappedread(struct inode *ip, int nbytes, uio_t *uio) void *pb; start = uio->uio_loffset; - off = start & (PAGE_CACHE_SIZE-1); - for (start &= PAGE_CACHE_MASK; len > 0; start += PAGE_CACHE_SIZE) { - bytes = MIN(PAGE_CACHE_SIZE - off, len); + off = start & (PAGE_SIZE-1); + for (start &= PAGE_MASK; len > 0; start += PAGE_SIZE) { + bytes = MIN(PAGE_SIZE - off, len); - pp = find_lock_page(mp, start >> PAGE_CACHE_SHIFT); + pp = find_lock_page(mp, start >> PAGE_SHIFT); if (pp) { ASSERT(PageUptodate(pp)); @@ -401,7 +401,7 @@ mappedread(struct inode *ip, int nbytes, uio_t *uio) mark_page_accessed(pp); unlock_page(pp); - page_cache_release(pp); + put_page(pp); } else { error = dmu_read_uio_dbuf(sa_get_db(zp->z_sa_hdl), uio, bytes); @@ -3894,8 +3894,8 @@ zfs_putpage(struct inode *ip, struct page *pp, struct writeback_control *wbc) pgoff = page_offset(pp); /* Page byte-offset in file */ offset = i_size_read(ip); /* File length in bytes */ - pglen = MIN(PAGE_CACHE_SIZE, /* Page length in bytes */ - P2ROUNDUP(offset, PAGE_CACHE_SIZE)-pgoff); + pglen = MIN(PAGE_SIZE, /* Page length in bytes */ + P2ROUNDUP(offset, PAGE_SIZE)-pgoff); /* Page is beyond end of file */ if (pgoff >= offset) { @@ -4006,7 +4006,7 @@ zfs_putpage(struct inode *ip, struct page *pp, struct writeback_control *wbc) } va = kmap(pp); - ASSERT3U(pglen, <=, PAGE_CACHE_SIZE); + ASSERT3U(pglen, <=, PAGE_SIZE); dmu_write(zsb->z_os, zp->z_id, pgoff, pglen, va, tx); kunmap(pp); @@ -4181,7 +4181,7 @@ zfs_fillpage(struct inode *ip, struct page *pl[], int nr_pages) int err; os = zsb->z_os; - io_len = nr_pages << PAGE_CACHE_SHIFT; + io_len = nr_pages << PAGE_SHIFT; i_size = i_size_read(ip); io_off = page_offset(pl[0]); diff --git a/module/zfs/zfs_znode.c b/module/zfs/zfs_znode.c index 860354b11b..1742a51ee6 100644 --- a/module/zfs/zfs_znode.c +++ b/module/zfs/zfs_znode.c @@ -1510,13 +1510,12 @@ zfs_zero_partial_page(znode_t *zp, uint64_t start, uint64_t len) int64_t off; void *pb; - ASSERT((start & PAGE_CACHE_MASK) == - ((start + len - 1) & PAGE_CACHE_MASK)); + ASSERT((start & PAGE_MASK) == ((start + len - 1) & PAGE_MASK)); - off = start & (PAGE_CACHE_SIZE - 1); - start &= PAGE_CACHE_MASK; + off = start & (PAGE_SIZE - 1); + start &= PAGE_MASK; - pp = find_lock_page(mp, start >> PAGE_CACHE_SHIFT); + pp = find_lock_page(mp, start >> PAGE_SHIFT); if (pp) { if (mapping_writably_mapped(mp)) flush_dcache_page(pp); @@ -1532,7 +1531,7 @@ zfs_zero_partial_page(znode_t *zp, uint64_t start, uint64_t len) SetPageUptodate(pp); ClearPageError(pp); unlock_page(pp); - page_cache_release(pp); + put_page(pp); } } @@ -1579,14 +1578,14 @@ zfs_free_range(znode_t *zp, uint64_t off, uint64_t len) loff_t first_page_offset, last_page_offset; /* first possible full page in hole */ - first_page = (off + PAGE_CACHE_SIZE - 1) >> PAGE_CACHE_SHIFT; + first_page = (off + PAGE_SIZE - 1) >> PAGE_SHIFT; /* last page of hole */ - last_page = (off + len) >> PAGE_CACHE_SHIFT; + last_page = (off + len) >> PAGE_SHIFT; /* offset of first_page */ - first_page_offset = first_page << PAGE_CACHE_SHIFT; + first_page_offset = first_page << PAGE_SHIFT; /* offset of last_page */ - last_page_offset = last_page << PAGE_CACHE_SHIFT; + last_page_offset = last_page << PAGE_SHIFT; /* truncate whole pages */ if (last_page_offset > first_page_offset) {