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authorLinus Torvalds <torvalds@linux-foundation.org>2026-08-24 08:46:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2026-08-24 08:46:03 -0700
commitcf9610f9116d55c5a66ef9f1faecacabd93a9322 (patch)
tree757a3d280760c654767631cab5ad8af2d86d1848 /fs/ntfs/bdev-io.c
downloadlinux-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.c120
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;
+}