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bf4afc53b7
This was done entirely with mindless brute force, using
git grep -l '\<k[vmz]*alloc_objs*(.*, GFP_KERNEL)' |
xargs sed -i 's/\(alloc_objs*(.*\), GFP_KERNEL)/\1)/'
to convert the new alloc_obj() users that had a simple GFP_KERNEL
argument to just drop that argument.
Note that due to the extreme simplicity of the scripting, any slightly
more complex cases spread over multiple lines would not be triggered:
they definitely exist, but this covers the vast bulk of the cases, and
the resulting diff is also then easier to check automatically.
For the same reason the 'flex' versions will be done as a separate
conversion.
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
137 lines
2.7 KiB
C
137 lines
2.7 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Squashfs - a compressed read only filesystem for Linux
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*
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* Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
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* Phillip Lougher <phillip@squashfs.org.uk>
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*
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* zlib_wrapper.c
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*/
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#include <linux/mutex.h>
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#include <linux/bio.h>
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#include <linux/slab.h>
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#include <linux/zlib.h>
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#include <linux/vmalloc.h>
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#include "squashfs_fs.h"
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#include "squashfs_fs_sb.h"
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#include "squashfs.h"
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#include "decompressor.h"
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#include "page_actor.h"
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static void *zlib_init(struct squashfs_sb_info *dummy, void *buff)
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{
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z_stream *stream = kmalloc_obj(z_stream);
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if (stream == NULL)
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goto failed;
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stream->workspace = vmalloc(zlib_inflate_workspacesize());
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if (stream->workspace == NULL)
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goto failed;
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return stream;
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failed:
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ERROR("Failed to allocate zlib workspace\n");
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kfree(stream);
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return ERR_PTR(-ENOMEM);
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}
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static void zlib_free(void *strm)
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{
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z_stream *stream = strm;
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if (stream)
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vfree(stream->workspace);
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kfree(stream);
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}
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static int zlib_uncompress(struct squashfs_sb_info *msblk, void *strm,
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struct bio *bio, int offset, int length,
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struct squashfs_page_actor *output)
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{
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struct bvec_iter_all iter_all = {};
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struct bio_vec *bvec = bvec_init_iter_all(&iter_all);
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int zlib_init = 0, error = 0;
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z_stream *stream = strm;
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stream->avail_out = PAGE_SIZE;
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stream->next_out = squashfs_first_page(output);
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stream->avail_in = 0;
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if (IS_ERR(stream->next_out)) {
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error = PTR_ERR(stream->next_out);
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goto finish;
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}
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for (;;) {
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int zlib_err;
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if (stream->avail_in == 0) {
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const void *data;
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int avail;
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if (!bio_next_segment(bio, &iter_all)) {
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/* Z_STREAM_END must be reached. */
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error = -EIO;
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break;
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}
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avail = min(length, ((int)bvec->bv_len) - offset);
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data = bvec_virt(bvec);
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length -= avail;
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stream->next_in = data + offset;
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stream->avail_in = avail;
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offset = 0;
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}
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if (stream->avail_out == 0) {
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stream->next_out = squashfs_next_page(output);
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if (IS_ERR(stream->next_out)) {
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error = PTR_ERR(stream->next_out);
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break;
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} else if (stream->next_out != NULL)
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stream->avail_out = PAGE_SIZE;
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}
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if (!zlib_init) {
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zlib_err = zlib_inflateInit(stream);
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if (zlib_err != Z_OK) {
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error = -EIO;
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break;
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}
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zlib_init = 1;
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}
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zlib_err = zlib_inflate(stream, Z_SYNC_FLUSH);
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if (zlib_err == Z_STREAM_END)
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break;
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if (zlib_err != Z_OK) {
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error = -EIO;
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break;
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}
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}
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finish:
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squashfs_finish_page(output);
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if (!error)
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if (zlib_inflateEnd(stream) != Z_OK)
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error = -EIO;
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return error ? error : stream->total_out;
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}
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const struct squashfs_decompressor squashfs_zlib_comp_ops = {
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.init = zlib_init,
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.free = zlib_free,
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.decompress = zlib_uncompress,
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.id = ZLIB_COMPRESSION,
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.name = "zlib",
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.alloc_buffer = 1,
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.supported = 1
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};
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