diff options
48 files changed, 1405 insertions, 560 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 540762a62906..e04d108055f0 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4208,7 +4208,7 @@ L: linux-i2c@vger.kernel.org S: Maintained F: drivers/i2c/busses/i2c-diolan-u2c.c -DIRECT ACCESS (DAX) +FILESYSTEM DIRECT ACCESS (DAX) M: Matthew Wilcox <mawilcox@microsoft.com> M: Ross Zwisler <ross.zwisler@linux.intel.com> L: linux-fsdevel@vger.kernel.org @@ -4217,6 +4217,12 @@ F: fs/dax.c F: include/linux/dax.h F: include/trace/events/fs_dax.h +DEVICE DIRECT ACCESS (DAX) +M: Dan Williams <dan.j.williams@intel.com> +L: linux-nvdimm@lists.01.org +S: Supported +F: drivers/dax/ + DIRECTORY NOTIFICATION (DNOTIFY) M: Jan Kara <jack@suse.cz> R: Amir Goldstein <amir73il@gmail.com> diff --git a/arch/alpha/include/uapi/asm/mman.h b/arch/alpha/include/uapi/asm/mman.h index 6bf730063e3f..2dbdf59258d9 100644 --- a/arch/alpha/include/uapi/asm/mman.h +++ b/arch/alpha/include/uapi/asm/mman.h @@ -12,6 +12,7 @@ #define MAP_SHARED 0x01 /* Share changes */ #define MAP_PRIVATE 0x02 /* Changes are private */ +#define MAP_SHARED_VALIDATE 0x03 /* share + validate extension flags */ #define MAP_TYPE 0x0f /* Mask for type of mapping (OSF/1 is _wrong_) */ #define MAP_FIXED 0x100 /* Interpret addr exactly */ #define MAP_ANONYMOUS 0x10 /* don't use a file */ diff --git a/arch/mips/include/uapi/asm/mman.h b/arch/mips/include/uapi/asm/mman.h index 20c3df7a8fdd..606e02ca4b6c 100644 --- a/arch/mips/include/uapi/asm/mman.h +++ b/arch/mips/include/uapi/asm/mman.h @@ -29,6 +29,7 @@ */ #define MAP_SHARED 0x001 /* Share changes */ #define MAP_PRIVATE 0x002 /* Changes are private */ +#define MAP_SHARED_VALIDATE 0x003 /* share + validate extension flags */ #define MAP_TYPE 0x00f /* Mask for type of mapping */ #define MAP_FIXED 0x010 /* Interpret addr exactly */ diff --git a/arch/parisc/include/uapi/asm/mman.h b/arch/parisc/include/uapi/asm/mman.h index d1af0d74a188..80510ba44c08 100644 --- a/arch/parisc/include/uapi/asm/mman.h +++ b/arch/parisc/include/uapi/asm/mman.h @@ -12,6 +12,7 @@ #define MAP_SHARED 0x01 /* Share changes */ #define MAP_PRIVATE 0x02 /* Changes are private */ +#define MAP_SHARED_VALIDATE 0x03 /* share + validate extension flags */ #define MAP_TYPE 0x03 /* Mask for type of mapping */ #define MAP_FIXED 0x04 /* Interpret addr exactly */ #define MAP_ANONYMOUS 0x10 /* don't use a file */ diff --git a/arch/xtensa/include/uapi/asm/mman.h b/arch/xtensa/include/uapi/asm/mman.h index 2bfe590694fc..3e9d01ada81f 100644 --- a/arch/xtensa/include/uapi/asm/mman.h +++ b/arch/xtensa/include/uapi/asm/mman.h @@ -36,6 +36,7 @@ */ #define MAP_SHARED 0x001 /* Share changes */ #define MAP_PRIVATE 0x002 /* Changes are private */ +#define MAP_SHARED_VALIDATE 0x003 /* share + validate extension flags */ #define MAP_TYPE 0x00f /* Mask for type of mapping */ #define MAP_FIXED 0x010 /* Interpret addr exactly */ diff --git a/drivers/acpi/nfit/core.c b/drivers/acpi/nfit/core.c index 9c2c49b6a240..ff2580e7611d 100644 --- a/drivers/acpi/nfit/core.c +++ b/drivers/acpi/nfit/core.c @@ -183,13 +183,33 @@ static int xlat_bus_status(void *buf, unsigned int cmd, u32 status) return 0; } -static int xlat_nvdimm_status(void *buf, unsigned int cmd, u32 status) +#define ACPI_LABELS_LOCKED 3 + +static int xlat_nvdimm_status(struct nvdimm *nvdimm, void *buf, unsigned int cmd, + u32 status) { + struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm); + switch (cmd) { case ND_CMD_GET_CONFIG_SIZE: + /* + * In the _LSI, _LSR, _LSW case the locked status is + * communicated via the read/write commands + */ + if (nfit_mem->has_lsi) + break; + if (status >> 16 & ND_CONFIG_LOCKED) return -EACCES; break; + case ND_CMD_GET_CONFIG_DATA: + if (nfit_mem->has_lsr && status == ACPI_LABELS_LOCKED) + return -EACCES; + break; + case ND_CMD_SET_CONFIG_DATA: + if (nfit_mem->has_lsw && status == ACPI_LABELS_LOCKED) + return -EACCES; + break; default: break; } @@ -205,13 +225,182 @@ static int xlat_status(struct nvdimm *nvdimm, void *buf, unsigned int cmd, { if (!nvdimm) return xlat_bus_status(buf, cmd, status); - return xlat_nvdimm_status(buf, cmd, status); + return xlat_nvdimm_status(nvdimm, buf, cmd, status); +} + +/* convert _LS{I,R} packages to the buffer object acpi_nfit_ctl expects */ +static union acpi_object *pkg_to_buf(union acpi_object *pkg) +{ + int i; + void *dst; + size_t size = 0; + union acpi_object *buf = NULL; + + if (pkg->type != ACPI_TYPE_PACKAGE) { + WARN_ONCE(1, "BIOS bug, unexpected element type: %d\n", + pkg->type); + goto err; + } + + for (i = 0; i < pkg->package.count; i++) { + union acpi_object *obj = &pkg->package.elements[i]; + + if (obj->type == ACPI_TYPE_INTEGER) + size += 4; + else if (obj->type == ACPI_TYPE_BUFFER) + size += obj->buffer.length; + else { + WARN_ONCE(1, "BIOS bug, unexpected element type: %d\n", + obj->type); + goto err; + } + } + + buf = ACPI_ALLOCATE(sizeof(*buf) + size); + if (!buf) + goto err; + + dst = buf + 1; + buf->type = ACPI_TYPE_BUFFER; + buf->buffer.length = size; + buf->buffer.pointer = dst; + for (i = 0; i < pkg->package.count; i++) { + union acpi_object *obj = &pkg->package.elements[i]; + + if (obj->type == ACPI_TYPE_INTEGER) { + memcpy(dst, &obj->integer.value, 4); + dst += 4; + } else if (obj->type == ACPI_TYPE_BUFFER) { + memcpy(dst, obj->buffer.pointer, obj->buffer.length); + dst += obj->buffer.length; + } + } +err: + ACPI_FREE(pkg); + return buf; +} + +static union acpi_object *int_to_buf(union acpi_object *integer) +{ + union acpi_object *buf = ACPI_ALLOCATE(sizeof(*buf) + 4); + void *dst = NULL; + + if (!buf) + goto err; + + if (integer->type != ACPI_TYPE_INTEGER) { + WARN_ONCE(1, "BIOS bug, unexpected element type: %d\n", + integer->type); + goto err; + } + + dst = buf + 1; + buf->type = ACPI_TYPE_BUFFER; + buf->buffer.length = 4; + buf->buffer.pointer = dst; + memcpy(dst, &integer->integer.value, 4); +err: + ACPI_FREE(integer); + return buf; +} + +static union acpi_object *acpi_label_write(acpi_handle handle, u32 offset, + u32 len, void *data) +{ + acpi_status rc; + struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL }; + struct acpi_object_list input = { + .count = 3, + .pointer = (union acpi_object []) { + [0] = { + .integer.type = ACPI_TYPE_INTEGER, + .integer.value = offset, + }, + [1] = { + .integer.type = ACPI_TYPE_INTEGER, + .integer.value = len, + }, + [2] = { + .buffer.type = ACPI_TYPE_BUFFER, + .buffer.pointer = data, + .buffer.length = len, + }, + }, + }; + + rc = acpi_evaluate_object(handle, "_LSW", &input, &buf); + if (ACPI_FAILURE(rc)) + return NULL; + return int_to_buf(buf.pointer); +} + +static union acpi_object *acpi_label_read(acpi_handle handle, u32 offset, + u32 len) +{ + acpi_status rc; + struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL }; + struct acpi_object_list input = { + .count = 2, + .pointer = (union acpi_object []) { + [0] = { + .integer.type = ACPI_TYPE_INTEGER, + .integer.value = offset, + }, + [1] = { + .integer.type = ACPI_TYPE_INTEGER, + .integer.value = len, + }, + }, + }; + + rc = acpi_evaluate_object(handle, "_LSR", &input, &buf); + if (ACPI_FAILURE(rc)) + return NULL; + return pkg_to_buf(buf.pointer); +} + +static union acpi_object *acpi_label_info(acpi_handle handle) +{ + acpi_status rc; + struct acpi_buffer buf = { ACPI_ALLOCATE_BUFFER, NULL }; + + rc = acpi_evaluate_object(handle, "_LSI", NULL, &buf); + if (ACPI_FAILURE(rc)) + return NULL; + return pkg_to_buf(buf.pointer); +} + +static u8 nfit_dsm_revid(unsigned family, unsigned func) +{ + static const u8 revid_table[NVDIMM_FAMILY_MAX+1][32] = { + [NVDIMM_FAMILY_INTEL] = { + [NVDIMM_INTEL_GET_MODES] = 2, + [NVDIMM_INTEL_GET_FWINFO] = 2, + [NVDIMM_INTEL_START_FWUPDATE] = 2, + [NVDIMM_INTEL_SEND_FWUPDATE] = 2, + [NVDIMM_INTEL_FINISH_FWUPDATE] = 2, + [NVDIMM_INTEL_QUERY_FWUPDATE] = 2, + [NVDIMM_INTEL_SET_THRESHOLD] = 2, + [NVDIMM_INTEL_INJECT_ERROR] = 2, + }, + }; + u8 id; + + if (family > NVDIMM_FAMILY_MAX) + return 0; + if (func > 31) + return 0; + id = revid_table[family][func]; + if (id == 0) + return 1; /* default */ + return id; } int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm, unsigned int cmd, void *buf, unsigned int buf_len, int *cmd_rc) { struct acpi_nfit_desc *acpi_desc = to_acpi_nfit_desc(nd_desc); + struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm); union acpi_object in_obj, in_buf, *out_obj; const struct nd_cmd_desc *desc = NULL; struct device *dev = acpi_desc->dev; @@ -235,7 +424,6 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm, } if (nvdimm) { - struct nfit_mem *nfit_mem = nvdimm_provider_data(nvdimm); struct acpi_device *adev = nfit_mem->adev; if (!adev) @@ -294,7 +482,29 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm, in_buf.buffer.pointer, min_t(u32, 256, in_buf.buffer.length), true); - out_obj = acpi_evaluate_dsm(handle, guid, 1, func, &in_obj); + /* call the BIOS, prefer the named methods over _DSM if available */ + if (nvdimm && cmd == ND_CMD_GET_CONFIG_SIZE && nfit_mem->has_lsi) + out_obj = acpi_label_info(handle); + else if (nvdimm && cmd == ND_CMD_GET_CONFIG_DATA && nfit_mem->has_lsr) { + struct nd_cmd_get_config_data_hdr *p = buf; + + out_obj = acpi_label_read(handle, p->in_offset, p->in_length); + } else if (nvdimm && cmd == ND_CMD_SET_CONFIG_DATA + && nfit_mem->has_lsw) { + struct nd_cmd_set_config_hdr *p = buf; + + out_obj = acpi_label_write(handle, p->in_offset, p->in_length, + p->in_buf); + } else { + u8 revid; + + if (nvdimm) + revid = nfit_dsm_revid(nfit_mem->family, func); + else + revid = 1; + out_obj = acpi_evaluate_dsm(handle, guid, revid, func, &in_obj); + } + if (!out_obj) { dev_dbg(dev, "%s:%s _DSM failed cmd: %s\n", __func__, dimm_name, cmd_name); @@ -356,8 +566,10 @@ int acpi_nfit_ctl(struct nvdimm_bus_descriptor *nd_desc, struct nvdimm *nvdimm, * Set fw_status for all the commands with a known format to be * later interpreted by xlat_status(). */ - if (i >= 1 && ((cmd >= ND_CMD_ARS_CAP && cmd <= ND_CMD_CLEAR_ERROR) - || (cmd >= ND_CMD_SMART && cmd <= ND_CMD_VENDOR))) + if (i >= 1 && ((!nvdimm && cmd >= ND_CMD_ARS_CAP + && cmd <= ND_CMD_CLEAR_ERROR) + || (nvdimm && cmd >= ND_CMD_SMART + && cmd <= ND_CMD_VENDOR))) fw_status = *(u32 *) out_obj->buffer.pointer; if (offset + in_buf.buffer.length < buf_len) { @@ -1431,6 +1643,7 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc, { struct acpi_device *adev, *adev_dimm; struct device *dev = acpi_desc->dev; + union acpi_object *obj; unsigned long dsm_mask; const guid_t *guid; int i; @@ -1463,7 +1676,7 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc, * different command sets. Note, that checking for function0 (bit0) * tells us if any commands are reachable through this GUID. */ - for (i = NVDIMM_FAMILY_INTEL; i <= NVDIMM_FAMILY_MSFT; i++) + for (i = 0; i <= NVDIMM_FAMILY_MAX; i++) if (acpi_check_dsm(adev_dimm->handle, to_nfit_uuid(i), 1, 1)) if (family < 0 || i == default_dsm_family) family = i; @@ -1473,7 +1686,7 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc, if (override_dsm_mask && !disable_vendor_specific) dsm_mask = override_dsm_mask; else if (nfit_mem->family == NVDIMM_FAMILY_INTEL) { - dsm_mask = 0x3fe; + dsm_mask = NVDIMM_INTEL_CMDMASK; if (disable_vendor_specific) dsm_mask &= ~(1 << ND_CMD_VENDOR); } else if (nfit_mem->family == NVDIMM_FAMILY_HPE1) { @@ -1493,9 +1706,32 @@ static int acpi_nfit_add_dimm(struct acpi_nfit_desc *acpi_desc, guid = to_nfit_uuid(nfit_mem->family); for_each_set_bit(i, &dsm_mask, BITS_PER_LONG) - if (acpi_check_dsm(adev_dimm->handle, guid, 1, 1ULL << i)) + if (acpi_check_dsm(adev_dimm->handle, guid, + nfit_dsm_revid(nfit_mem->family, i), + 1ULL << i)) set_bit(i, &nfit_mem->dsm_mask); + obj = acpi_label_info(adev_dimm->handle); + if (obj) { + ACPI_FREE(obj); + nfit_mem->has_lsi = 1; + dev_dbg(dev, "%s: has _LSI\n", dev_name(&adev_dimm->dev)); + } + + obj = acpi_label_read(adev_dimm->handle, 0, 0); + if (obj) { + ACPI_FREE(obj); + nfit_mem->has_lsr = 1; + dev_dbg(dev, "%s: has _LSR\n", dev_name(&adev_dimm->dev)); + } + + obj = acpi_label_write(adev_dimm->handle, 0, 0, NULL); + if (obj) { + ACPI_FREE(obj); + nfit_mem->has_lsw = 1; + dev_dbg(dev, "%s: has _LSW\n", dev_name(&adev_dimm->dev)); + } + return 0; } @@ -1571,8 +1807,21 @@ static int acpi_nfit_register_dimms(struct acpi_nfit_desc *acpi_desc) * userspace interface. */ cmd_mask = 1UL << ND_CMD_CALL; - if (nfit_mem->family == NVDIMM_FAMILY_INTEL) - cmd_mask |= nfit_mem->dsm_mask; + if (nfit_mem->family == NVDIMM_FAMILY_INTEL) { + /* + * These commands have a 1:1 correspondence + * between DSM payload and libnvdimm ioctl + * payload format. + */ + cmd_mask |= nfit_mem->dsm_mask & NVDIMM_STANDARD_CMDMASK; + } + + if (nfit_mem->has_lsi) + set_bit(ND_CMD_GET_CONFIG_SIZE, &cmd_mask); + if (nfit_mem->has_lsr) + set_bit(ND_CMD_GET_CONFIG_DATA, &cmd_mask); + if (nfit_mem->has_lsw) + set_bit(ND_CMD_SET_CONFIG_DATA, &cmd_mask); flush = nfit_mem->nfit_flush ? nfit_mem->nfit_flush->flush : NULL; @@ -1645,6 +1894,7 @@ static void acpi_nfit_init_dsms(struct acpi_nfit_desc *acpi_desc) int i; nd_desc->cmd_mask = acpi_desc->bus_cmd_force_en; + nd_desc->bus_dsm_mask = acpi_desc->bus_nfit_cmd_force_en; adev = to_acpi_dev(acpi_desc); if (!adev) return; @@ -2239,7 +2489,7 @@ static int ars_status_process_records(struct acpi_nfit_desc *acpi_desc, if (ars_status->out_length < 44 + sizeof(struct nd_ars_record) * (i + 1)) break; - rc = nvdimm_bus_add_poison(nvdimm_bus, + rc = nvdimm_bus_add_badrange(nvdimm_bus, ars_status->records[i].err_address, ars_status->records[i].length); if (rc) diff --git a/drivers/acpi/nfit/mce.c b/drivers/acpi/nfit/mce.c index feeb95d574fa..b92921439657 100644 --- a/drivers/acpi/nfit/mce.c +++ b/drivers/acpi/nfit/mce.c @@ -67,7 +67,7 @@ static int nfit_handle_mce(struct notifier_block *nb, unsigned long val, continue; /* If this fails due to an -ENOMEM, there is little we can do */ - nvdimm_bus_add_poison(acpi_desc->nvdimm_bus, + nvdimm_bus_add_badrange(acpi_desc->nvdimm_bus, ALIGN(mce->addr, L1_CACHE_BYTES), L1_CACHE_BYTES); nvdimm_region_notify(nfit_spa->nd_region, diff --git a/drivers/acpi/nfit/nfit.h b/drivers/acpi/nfit/nfit.h index 54292db61262..f0cf18b2da8b 100644 --- a/drivers/acpi/nfit/nfit.h +++ b/drivers/acpi/nfit/nfit.h @@ -24,7 +24,7 @@ /* ACPI 6.1 */ #define UUID_NFIT_BUS "2f10e7a4-9e91-11e4-89d3-123b93f75cba" -/* http://pmem.io/documents/NVDIMM_DSM_Interface_Example.pdf */ +/* http://pmem.io/documents/NVDIMM_DSM_Interface-V1.6.pdf */ #define UUID_NFIT_DIMM "4309ac30-0d11-11e4-9191-0800200c9a66" /* https://github.com/HewlettPackard/hpe-nvm/blob/master/Documentation/ */ @@ -38,6 +38,37 @@ | ACPI_NFIT_MEM_RESTORE_FAILED | ACPI_NFIT_MEM_FLUSH_FAILED \ | ACPI_NFIT_MEM_NOT_ARMED | ACPI_NFIT_MEM_MAP_FAILED) +#define NVDIMM_FAMILY_MAX NVDIMM_FAMILY_MSFT + +#define NVDIMM_STANDARD_CMDMASK \ +(1 << ND_CMD_SMART | 1 << ND_CMD_SMART_THRESHOLD | 1 << ND_CMD_DIMM_FLAGS \ + | 1 << ND_CMD_GET_CONFIG_SIZE | 1 << ND_CMD_GET_CONFIG_DATA \ + | 1 << ND_CMD_SET_CONFIG_DATA | 1 << ND_CMD_VENDOR_EFFECT_LOG_SIZE \ + | 1 << ND_CMD_VENDOR_EFFECT_LOG | 1 << ND_CMD_VENDOR) + +/* + * Command numbers that the kernel needs to know about to handle + * non-default DSM revision ids + */ +enum nvdimm_family_cmds { + NVDIMM_INTEL_LATCH_SHUTDOWN = 10, + NVDIMM_INTEL_GET_MODES = 11, + NVDIMM_INTEL_GET_FWINFO = 12, + NVDIMM_INTEL_START_FWUPDATE = 13, + NVDIMM_INTEL_SEND_FWUPDATE = 14, + NVDIMM_INTEL_FINISH_FWUPDATE = 15, + NVDIMM_INTEL_QUERY_FWUPDATE = 16, + NVDIMM_INTEL_SET_THRESHOLD = 17, + NVDIMM_INTEL_INJECT_ERROR = 18, +}; + +#define NVDIMM_INTEL_CMDMASK \ +(NVDIMM_STANDARD_CMDMASK | 1 << NVDIMM_INTEL_GET_MODES \ + | 1 << NVDIMM_INTEL_GET_FWINFO | 1 << NVDIMM_INTEL_START_FWUPDATE \ + | 1 << NVDIMM_INTEL_SEND_FWUPDATE | 1 << NVDIMM_INTEL_FINISH_FWUPDATE \ + | 1 << NVDIMM_INTEL_QUERY_FWUPDATE | 1 << NVDIMM_INTEL_SET_THRESHOLD \ + | 1 << NVDIMM_INTEL_INJECT_ERROR | 1 << NVDIMM_INTEL_LATCH_SHUTDOWN) + enum nfit_uuids { /* for simplicity alias the uuid index with the family id */ NFIT_DEV_DIMM = NVDIMM_FAMILY_INTEL, @@ -140,6 +171,9 @@ struct nfit_mem { struct resource *flush_wpq; unsigned long dsm_mask; int family; + u32 has_lsi:1; + u32 has_lsr:1; + u32 has_lsw:1; }; struct acpi_nfit_desc { @@ -167,6 +201,7 @@ struct acpi_nfit_desc { unsigned int init_complete:1; unsigned long dimm_cmd_force_en; unsigned long bus_cmd_force_en; + unsigned long bus_nfit_cmd_force_en; int (*blk_do_io)(struct nd_blk_region *ndbr, resource_size_t dpa, void *iobuf, u64 len, int rw); }; diff --git a/drivers/block/Kconfig b/drivers/block/Kconfig index 923b417eaf4c..40579d0cb3d1 100644 --- a/drivers/block/Kconfig +++ b/drivers/block/Kconfig @@ -302,7 +302,6 @@ config BLK_DEV_SX8 config BLK_DEV_RAM tristate "RAM block device support" - select DAX if BLK_DEV_RAM_DAX ---help--- Saying Y here will allow you to use a portion of your RAM memory as a block device, so that you can make file systems on it, read and @@ -338,17 +337,6 @@ config BLK_DEV_RAM_SIZE The default value is 4096 kilobytes. Only change this if you know what you are doing. -config BLK_DEV_RAM_DAX - bool "Support Direct Access (DAX) to RAM block devices" - depends on BLK_DEV_RAM && FS_DAX - default n - help - Support filesystems using DAX to access RAM block devices. This - avoids double-buffering data in the page cache before copying it - to the block device. Answering Y will slightly enlarge the kernel, - and will prevent RAM block device backing store memory from being - allocated from highmem (only a problem for highmem systems). - config CDROM_PKTCDVD tristate "Packet writing on CD/DVD media (DEPRECATED)" depends on !UML diff --git a/drivers/block/brd.c b/drivers/block/brd.c index 588360d79fca..8028a3a7e7fd 100644 --- a/drivers/block/brd.c +++ b/drivers/block/brd.c @@ -21,11 +21,6 @@ #include <linux/fs.h> #include <linux/slab.h> #include <linux/backing-dev.h> -#ifdef CONFIG_BLK_DEV_RAM_DAX -#include <linux/pfn_t.h> -#include <linux/dax.h> -#include <linux/uio.h> -#endif #include <linux/uaccess.h> @@ -45,9 +40,6 @@ struct brd_device { struct request_queue *brd_queue; struct gendisk *brd_disk; -#ifdef CONFIG_BLK_DEV_RAM_DAX - struct dax_device *dax_dev; -#endif struct list_head brd_list; /* @@ -112,9 +104,6 @@ static struct page *brd_insert_page(struct brd_device *brd, sector_t sector) * restriction might be able to be lifted. */ gfp_flags = GFP_NOIO | __GFP_ZERO; -#ifndef CONFIG_BLK_DEV_RAM_DAX - gfp_flags |= __GFP_HIGHMEM; -#endif page = alloc_page(gfp_flags); if (!page) return NULL; @@ -334,43 +323,6 @@ static int brd_rw_page(struct block_device *bdev, sector_t sector, return err; } -#ifdef CONFIG_BLK_DEV_RAM_DAX -static long __brd_direct_access(struct brd_device *brd, pgoff_t pgoff, - long nr_pages, void **kaddr, pfn_t *pfn) -{ - struct page *page; - - if (!brd) - return -ENODEV; - page = brd_insert_page(brd, (sector_t)pgoff << PAGE_SECTORS_SHIFT); - if (!page) - return -ENOSPC; - *kaddr = page_address(page); - *pfn = page_to_pfn_t(page); - - return 1; -} - -static long brd_dax_direct_access(struct dax_device *dax_dev, - pgoff_t pgoff, long nr_pages, void **kaddr, pfn_t *pfn) -{ - struct brd_device *brd = dax_get_private(dax_dev); - - return __brd_direct_access(brd, pgoff, nr_pages, kaddr, pfn); -} - -static size_t brd_dax_copy_from_iter(struct dax_device *dax_dev, pgoff_t pgoff, - void *addr, size_t bytes, struct iov_iter *i) -{ - return copy_from_iter(addr, bytes, i); -} - -static const struct dax_operations brd_dax_ops = { - .direct_access = brd_dax_direct_access, - .copy_from_iter = brd_dax_copy_from_iter, -}; -#endif - static const struct block_device_operations brd_fops = { .owner = THIS_MODULE, .rw_page = brd_rw_page, @@ -451,21 +403,8 @@ static struct brd_device *brd_alloc(int i) set_capacity(disk, rd_size * 2); disk->queue->backing_dev_info->capabilities |= BDI_CAP_SYNCHRONOUS_IO; -#ifdef CONFIG_BLK_DEV_RAM_DAX - queue_flag_set_unlocked(QUEUE_FLAG_DAX, brd->brd_queue); - brd->dax_dev = alloc_dax(brd, disk->disk_name, &brd_dax_ops); - if (!brd->dax_dev) - goto out_free_inode; -#endif - - return brd; -#ifdef CONFIG_BLK_DEV_RAM_DAX -out_free_inode: - kill_dax(brd->dax_dev); - put_dax(brd->dax_dev); -#endif out_free_queue: blk_cleanup_queue(brd->brd_queue); out_free_dev: @@ -505,10 +444,6 @@ out: static void brd_del_one(struct brd_device *brd) { list_del(&brd->brd_list); -#ifdef CONFIG_BLK_DEV_RAM_DAX - kill_dax(brd->dax_dev); - put_dax(brd->dax_dev); -#endif del_gendisk(brd->brd_disk); brd_free(brd); } diff --git a/drivers/dax/device.c b/drivers/dax/device.c index e9f3b3e4bbf4..6833ada237ab 100644 --- a/drivers/dax/device.c +++ b/drivers/dax/device.c @@ -222,7 +222,8 @@ __weak phys_addr_t dax_pgoff_to_phys(struct dev_dax *dev_dax, pgoff_t pgoff, unsigned long size) { struct resource *res; - phys_addr_t phys; + /* gcc-4.6.3-nolibc for i386 complains that this is uninitialized */ + phys_addr_t uninitialized_var(phys); int i; for (i = |