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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-24 08:46:03 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2026-08-24 08:46:03 -0700 |
| commit | cf9610f9116d55c5a66ef9f1faecacabd93a9322 (patch) | |
| tree | 757a3d280760c654767631cab5ad8af2d86d1848 /fs/ntfs/bdev-io.c | |
| download | linux-stable-cf9610f9116d55c5a66ef9f1faecacabd93a9322.tar.gz linux-stable-cf9610f9116d55c5a66ef9f1faecacabd93a9322.zip | |
Merge tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrlgrafted
Pull pin control updates from Linus Walleij:
"Core changes:
- Use the non-blocking mux_state_try_select() in the generic MUX pin
control back-end
- Free pin maps on pinctrl_generic_to_map() failure in the core
helpers
New hardware pin control:
- Qualcomm Maili TLMM SoC, PMG1110 PMIC, and Eliza LPASS LPI TLMM SoC
(this is for the low power audio, LPASS = Low Power Audio SubSystem
portions)
- Upboard support on top of the Intel pin controller
- Apple T6030 and T6031 support (just compatible strings)
- Samsung Exynos 8855 SoC
- Mediatek MT6858 SoC
- Rockchip RK3308B and RV1106 SoCs
- Airoha EN7523 and AN7563 SoCs
Improvements:
- Qualcomm TLMM GPIOs are unconditionally marked as wakeup capable
- Qualcomm improvements on top of the Qualcomm PDC (power domain
controller) irqchip improvements from tglx:s tree
- Qualcomm IPQ806x and IPQ9650 non-urgent pin grop fixups
- The NPCM8xx driver has been put into shape fixing many pin and
group definitions
- Some non-urgent Tegra 264 pin assignments are fixed up
- Some non-urgent fixups to Airoha AN7581 and AN7583 registers and
pin assignments, missing features etc"
* tag 'pinctrl-v7.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-pinctrl: (130 commits)
dt-bindings: pinctrl: Convert TI DA850 pupd to DT schema
pinctrl: meson: sync some modify from A4
pinctrl: meson: a4: Add input enable pin configuration
pinctrl: realtek: rtd1625: remove unused group name spdif_sel
pinctrl: realtek: rtd1625: fix base_bit for VE4 GPIO 13
dt-bindings: pinctrl: microchip,pic32mzda-pinctrl: Convert to DT schema
Revert "Merge branch 'ib-rsk7204' into devel"
pinctrl: rockchip: Add RV1106 pinctrl support
dt-bindings: pinctrl: rockchip: Add RV1106 compatible
pinctrl: rockchip: Decode drive strength in the get function
pinctrl: fix PINCTRL_GENERIC_MUX not always being selectable
pinctrl: airoha: add support of an7563 SoC
dt-bindings: pinctrl: airoha: add support of an7563 pin controller
pinctrl: airoha: try to find chip scu node by phandle first
pinctrl: airoha: add support of en7523 SoC
dt-bindings: pinctrl: airoha: add support of en7523 pin controller
pinctrl: airoha: an7583: add support for olt pinmux
pinctrl: airoha: an7583: add support for pon_alt pinmux
pinctrl: airoha: an7583: add support for npu_uart pinmux
dt-bindings: pinctrl: airoha: an7583: add missed features
...
Diffstat (limited to 'fs/ntfs/bdev-io.c')
| -rw-r--r-- | fs/ntfs/bdev-io.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/fs/ntfs/bdev-io.c b/fs/ntfs/bdev-io.c new file mode 100644 index 000000000..27d7c2767 --- /dev/null +++ b/fs/ntfs/bdev-io.c @@ -0,0 +1,120 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * NTFS block device I/O. + * + * Copyright (c) 2026 LG Electronics Co., Ltd. + */ + +#include <linux/blkdev.h> + +#include "ntfs.h" + +/* + * ntfs_bdev_read - Read data directly from block device using bio + * @bdev: block device to read from + * @data: destination buffer + * @start: starting byte offset on the block device + * @size: number of bytes to read + * + * Reads @size bytes starting from byte offset @start directly from the block + * device using one or more BIOs. This function bypasses the page cache + * completely and performs synchronous I/O with REQ_META | REQ_SYNC flags set. + * + * The @start offset must be sector-aligned (512 bytes). If it is not aligned, + * the function will return -EINVAL. + * + * If the destination buffer @data is not a vmalloc address, it falls back + * to the more efficient bdev_rw_virt() helper. + * + * Return: 0 on success, negative error code on failure. + */ +int ntfs_bdev_read(struct block_device *bdev, char *data, loff_t start, size_t size) +{ + unsigned int done = 0, added; + int error; + struct bio *bio; + enum req_op op; + sector_t sector = start >> SECTOR_SHIFT; + + if (start & (SECTOR_SIZE - 1)) + return -EINVAL; + + op = REQ_OP_READ | REQ_META | REQ_SYNC; + if (!is_vmalloc_addr(data)) + return bdev_rw_virt(bdev, sector, data, size, op); + + bio = bio_alloc(bdev, + bio_max_segs(DIV_ROUND_UP(size, PAGE_SIZE)), + op, GFP_KERNEL); + bio->bi_iter.bi_sector = sector; + + do { + added = bio_add_vmalloc_chunk(bio, data + done, size - done); + if (!added) { + struct bio *prev = bio; + + bio = bio_alloc(prev->bi_bdev, + bio_max_segs(DIV_ROUND_UP(size - done, PAGE_SIZE)), + prev->bi_opf, GFP_KERNEL); + bio->bi_iter.bi_sector = bio_end_sector(prev); + bio_chain(prev, bio); + submit_bio(prev); + } + done += added; + } while (done < size); + + error = submit_bio_wait(bio); + bio_put(bio); + + if (op == REQ_OP_READ) + invalidate_kernel_vmap_range(data, size); + return error; +} + +/* + * ntfs_bdev_write - Update block device contents via page cache + * @sb: super block of the mounted NTFS filesystem + * @buf: source buffer containing data to write + * @start: starting byte offset on the block device + * @size: number of bytes to write + * + * Writes @size bytes from @buf to the block device (sb->s_bdev) starting + * at byte offset @start. The write is performed entirely through the page + * cache of the block device's address space. + */ +int ntfs_bdev_write(struct super_block *sb, void *buf, loff_t start, size_t size) +{ + pgoff_t idx, idx_end; + loff_t offset, end = start + size; + u32 from, to, buf_off = 0; + struct folio *folio; + + idx = start >> PAGE_SHIFT; + idx_end = end >> PAGE_SHIFT; + from = start & ~PAGE_MASK; + + if (idx == idx_end) + idx_end++; + + for (; idx < idx_end; idx++, from = 0) { + u32 len; + + folio = read_mapping_folio(sb->s_bdev->bd_mapping, idx, NULL); + if (IS_ERR(folio)) { + ntfs_error(sb, "Unable to read %ld page", idx); + return PTR_ERR(folio); + } + + offset = (loff_t)idx << PAGE_SHIFT; + to = min_t(u32, end - offset, PAGE_SIZE); + len = to - from; + + memcpy_to_folio(folio, from, buf + buf_off, len); + buf_off += len; + folio_mark_uptodate(folio); + folio_mark_dirty(folio); + folio_put(folio); + } + + return 0; +} |
