a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 1) // SPDX-License-Identifier: GPL-2.0
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 2) /*
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 3) * Copyright (C) 2018 Oracle. All Rights Reserved.
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 4) * Author: Darrick J. Wong <darrick.wong@oracle.com>
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 5) */
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 6) #include <linux/module.h>
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 7) #include <linux/compiler.h>
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 8) #include <linux/fs.h>
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 9) #include <linux/iomap.h>
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 10) #include <linux/swap.h>
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 11)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 12) /* Swapfile activation */
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 13)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 14) struct iomap_swapfile_info {
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 15) struct iomap iomap; /* accumulated iomap */
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 16) struct swap_info_struct *sis;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 17) uint64_t lowest_ppage; /* lowest physical addr seen (pages) */
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 18) uint64_t highest_ppage; /* highest physical addr seen (pages) */
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 19) unsigned long nr_pages; /* number of pages collected */
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 20) int nr_extents; /* extent count */
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 21) struct file *file;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 22) };
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 23)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 24) /*
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 25) * Collect physical extents for this swap file. Physical extents reported to
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 26) * the swap code must be trimmed to align to a page boundary. The logical
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 27) * offset within the file is irrelevant since the swapfile code maps logical
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 28) * page numbers of the swap device to the physical page-aligned extents.
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 29) */
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 30) static int iomap_swapfile_add_extent(struct iomap_swapfile_info *isi)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 31) {
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 32) struct iomap *iomap = &isi->iomap;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 33) unsigned long nr_pages;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 34) uint64_t first_ppage;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 35) uint64_t first_ppage_reported;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 36) uint64_t next_ppage;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 37) int error;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 38)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 39) /*
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 40) * Round the start up and the end down so that the physical
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 41) * extent aligns to a page boundary.
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 42) */
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 43) first_ppage = ALIGN(iomap->addr, PAGE_SIZE) >> PAGE_SHIFT;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 44) next_ppage = ALIGN_DOWN(iomap->addr + iomap->length, PAGE_SIZE) >>
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 45) PAGE_SHIFT;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 46)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 47) /* Skip too-short physical extents. */
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 48) if (first_ppage >= next_ppage)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 49) return 0;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 50) nr_pages = next_ppage - first_ppage;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 51)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 52) /*
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 53) * Calculate how much swap space we're adding; the first page contains
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 54) * the swap header and doesn't count. The mm still wants that first
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 55) * page fed to add_swap_extent, however.
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 56) */
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 57) first_ppage_reported = first_ppage;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 58) if (iomap->offset == 0)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 59) first_ppage_reported++;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 60) if (isi->lowest_ppage > first_ppage_reported)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 61) isi->lowest_ppage = first_ppage_reported;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 62) if (isi->highest_ppage < (next_ppage - 1))
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 63) isi->highest_ppage = next_ppage - 1;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 64)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 65) /* Add extent, set up for the next call. */
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 66) error = add_swap_extent(isi->sis, isi->nr_pages, nr_pages, first_ppage);
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 67) if (error < 0)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 68) return error;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 69) isi->nr_extents += error;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 70) isi->nr_pages += nr_pages;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 71) return 0;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 72) }
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 73)
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 74) static int iomap_swapfile_fail(struct iomap_swapfile_info *isi, const char *str)
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 75) {
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 76) char *buf, *p = ERR_PTR(-ENOMEM);
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 77)
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 78) buf = kmalloc(PATH_MAX, GFP_KERNEL);
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 79) if (buf)
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 80) p = file_path(isi->file, buf, PATH_MAX);
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 81) pr_err("swapon: file %s %s\n", IS_ERR(p) ? "<unknown>" : p, str);
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 82) kfree(buf);
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 83) return -EINVAL;
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 84) }
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 85)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 86) /*
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 87) * Accumulate iomaps for this swap file. We have to accumulate iomaps because
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 88) * swap only cares about contiguous page-aligned physical extents and makes no
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 89) * distinction between written and unwritten extents.
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 90) */
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 91) static loff_t iomap_swapfile_activate_actor(struct inode *inode, loff_t pos,
c039b99792726 (Goldwyn Rodrigues 2019-10-18 16:44:10 -0700 92) loff_t count, void *data, struct iomap *iomap,
c039b99792726 (Goldwyn Rodrigues 2019-10-18 16:44:10 -0700 93) struct iomap *srcmap)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 94) {
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 95) struct iomap_swapfile_info *isi = data;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 96) int error;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 97)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 98) switch (iomap->type) {
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 99) case IOMAP_MAPPED:
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 100) case IOMAP_UNWRITTEN:
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 101) /* Only real or unwritten extents. */
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 102) break;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 103) case IOMAP_INLINE:
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 104) /* No inline data. */
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 105) return iomap_swapfile_fail(isi, "is inline");
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 106) default:
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 107) return iomap_swapfile_fail(isi, "has unallocated extents");
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 108) }
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 109)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 110) /* No uncommitted metadata or shared blocks. */
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 111) if (iomap->flags & IOMAP_F_DIRTY)
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 112) return iomap_swapfile_fail(isi, "is not committed");
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 113) if (iomap->flags & IOMAP_F_SHARED)
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 114) return iomap_swapfile_fail(isi, "has shared extents");
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 115)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 116) /* Only one bdev per swap file. */
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 117) if (iomap->bdev != isi->sis->bdev)
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 118) return iomap_swapfile_fail(isi, "outside the main device");
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 119)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 120) if (isi->iomap.length == 0) {
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 121) /* No accumulated extent, so just store it. */
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 122) memcpy(&isi->iomap, iomap, sizeof(isi->iomap));
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 123) } else if (isi->iomap.addr + isi->iomap.length == iomap->addr) {
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 124) /* Append this to the accumulated extent. */
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 125) isi->iomap.length += iomap->length;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 126) } else {
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 127) /* Otherwise, add the retained iomap and store this one. */
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 128) error = iomap_swapfile_add_extent(isi);
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 129) if (error)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 130) return error;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 131) memcpy(&isi->iomap, iomap, sizeof(isi->iomap));
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 132) }
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 133) return count;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 134) }
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 135)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 136) /*
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 137) * Iterate a swap file's iomaps to construct physical extents that can be
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 138) * passed to the swapfile subsystem.
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 139) */
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 140) int iomap_swapfile_activate(struct swap_info_struct *sis,
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 141) struct file *swap_file, sector_t *pagespan,
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 142) const struct iomap_ops *ops)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 143) {
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 144) struct iomap_swapfile_info isi = {
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 145) .sis = sis,
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 146) .lowest_ppage = (sector_t)-1ULL,
ad89b66cbad18 (Christoph Hellwig 2021-03-26 10:55:40 -0700 147) .file = swap_file,
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 148) };
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 149) struct address_space *mapping = swap_file->f_mapping;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 150) struct inode *inode = mapping->host;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 151) loff_t pos = 0;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 152) loff_t len = ALIGN_DOWN(i_size_read(inode), PAGE_SIZE);
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 153) loff_t ret;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 154)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 155) /*
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 156) * Persist all file mapping metadata so that we won't have any
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 157) * IOMAP_F_DIRTY iomaps.
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 158) */
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 159) ret = vfs_fsync(swap_file, 1);
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 160) if (ret)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 161) return ret;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 162)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 163) while (len > 0) {
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 164) ret = iomap_apply(inode, pos, len, IOMAP_REPORT,
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 165) ops, &isi, iomap_swapfile_activate_actor);
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 166) if (ret <= 0)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 167) return ret;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 168)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 169) pos += ret;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 170) len -= ret;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 171) }
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 172)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 173) if (isi.iomap.length) {
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 174) ret = iomap_swapfile_add_extent(&isi);
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 175) if (ret)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 176) return ret;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 177) }
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 178)
5808fecc57239 (Ritesh Harjani 2021-03-09 09:29:11 -0800 179) /*
5808fecc57239 (Ritesh Harjani 2021-03-09 09:29:11 -0800 180) * If this swapfile doesn't contain even a single page-aligned
5808fecc57239 (Ritesh Harjani 2021-03-09 09:29:11 -0800 181) * contiguous range of blocks, reject this useless swapfile to
5808fecc57239 (Ritesh Harjani 2021-03-09 09:29:11 -0800 182) * prevent confusion later on.
5808fecc57239 (Ritesh Harjani 2021-03-09 09:29:11 -0800 183) */
5808fecc57239 (Ritesh Harjani 2021-03-09 09:29:11 -0800 184) if (isi.nr_pages == 0) {
5808fecc57239 (Ritesh Harjani 2021-03-09 09:29:11 -0800 185) pr_warn("swapon: Cannot find a single usable page in file.\n");
5808fecc57239 (Ritesh Harjani 2021-03-09 09:29:11 -0800 186) return -EINVAL;
5808fecc57239 (Ritesh Harjani 2021-03-09 09:29:11 -0800 187) }
5808fecc57239 (Ritesh Harjani 2021-03-09 09:29:11 -0800 188)
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 189) *pagespan = 1 + isi.highest_ppage - isi.lowest_ppage;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 190) sis->max = isi.nr_pages;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 191) sis->pages = isi.nr_pages - 1;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 192) sis->highest_bit = isi.nr_pages - 1;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 193) return isi.nr_extents;
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 194) }
a45c0eccc5646 (Darrick J. Wong 2019-07-15 08:50:57 -0700 195) EXPORT_SYMBOL_GPL(iomap_swapfile_activate);
VisionFive2 Linux kernel
StarFive Tech Linux Kernel for VisionFive (JH7110) boards (mirror)
More than 9999 Commits
32 Branches
54 Tags