diff options
author | Dan Williams <dan.j.williams@intel.com> | 2016-06-04 04:06:47 +0300 |
---|---|---|
committer | Dan Williams <dan.j.williams@intel.com> | 2016-07-13 05:25:38 +0300 |
commit | 7a9eb20666317794d0279843fbd091af93907780 (patch) | |
tree | 022accc57a56ee2988f29fe718546b0f1ec5dca0 | |
parent | 7c8a6a71904d57ae5fb24140f9661ec22ca9ee85 (diff) | |
download | linux-7a9eb20666317794d0279843fbd091af93907780.tar.xz |
pmem: kill __pmem address space
The __pmem address space was meant to annotate codepaths that touch
persistent memory and need to coordinate a call to wmb_pmem(). Now that
wmb_pmem() is gone, there is little need to keep this annotation.
Cc: Christoph Hellwig <hch@lst.de>
Cc: Ross Zwisler <ross.zwisler@linux.intel.com>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
-rw-r--r-- | Documentation/filesystems/Locking | 2 | ||||
-rw-r--r-- | arch/powerpc/sysdev/axonram.c | 4 | ||||
-rw-r--r-- | arch/x86/include/asm/pmem.h | 41 | ||||
-rw-r--r-- | drivers/acpi/nfit.h | 2 | ||||
-rw-r--r-- | drivers/block/brd.c | 4 | ||||
-rw-r--r-- | drivers/nvdimm/pmem.c | 6 | ||||
-rw-r--r-- | drivers/nvdimm/pmem.h | 4 | ||||
-rw-r--r-- | drivers/s390/block/dcssblk.c | 6 | ||||
-rw-r--r-- | fs/dax.c | 6 | ||||
-rw-r--r-- | include/linux/blkdev.h | 6 | ||||
-rw-r--r-- | include/linux/compiler.h | 2 | ||||
-rw-r--r-- | include/linux/nd.h | 2 | ||||
-rw-r--r-- | include/linux/pmem.h | 70 | ||||
-rwxr-xr-x | scripts/checkpatch.pl | 1 | ||||
-rw-r--r-- | tools/testing/nvdimm/pmem-dax.c | 2 |
15 files changed, 56 insertions, 102 deletions
diff --git a/Documentation/filesystems/Locking b/Documentation/filesystems/Locking index 75eea7ce3d7c..d9c37ec4c760 100644 --- a/Documentation/filesystems/Locking +++ b/Documentation/filesystems/Locking @@ -395,7 +395,7 @@ prototypes: int (*release) (struct gendisk *, fmode_t); int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long); int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long); - int (*direct_access) (struct block_device *, sector_t, void __pmem **, + int (*direct_access) (struct block_device *, sector_t, void **, unsigned long *); int (*media_changed) (struct gendisk *); void (*unlock_native_capacity) (struct gendisk *); diff --git a/arch/powerpc/sysdev/axonram.c b/arch/powerpc/sysdev/axonram.c index ff75d70f7285..a87489d007dc 100644 --- a/arch/powerpc/sysdev/axonram.c +++ b/arch/powerpc/sysdev/axonram.c @@ -143,12 +143,12 @@ axon_ram_make_request(struct request_queue *queue, struct bio *bio) */ static long axon_ram_direct_access(struct block_device *device, sector_t sector, - void __pmem **kaddr, pfn_t *pfn, long size) + void **kaddr, pfn_t *pfn, long size) { struct axon_ram_bank *bank = device->bd_disk->private_data; loff_t offset = (loff_t)sector << AXON_RAM_SECTOR_SHIFT; - *kaddr = (void __pmem __force *) bank->io_addr + offset; + *kaddr = (void *) bank->io_addr + offset; *pfn = phys_to_pfn_t(bank->ph_addr + offset, PFN_DEV); return bank->size - offset; } diff --git a/arch/x86/include/asm/pmem.h b/arch/x86/include/asm/pmem.h index a8cf2a6b14d9..643eba42d620 100644 --- a/arch/x86/include/asm/pmem.h +++ b/arch/x86/include/asm/pmem.h @@ -28,10 +28,9 @@ * Copy data to persistent memory media via non-temporal stores so that * a subsequent pmem driver flush operation will drain posted write queues. */ -static inline void arch_memcpy_to_pmem(void __pmem *dst, const void *src, - size_t n) +static inline void arch_memcpy_to_pmem(void *dst, const void *src, size_t n) { - int unwritten; + int rem; /* * We are copying between two kernel buffers, if @@ -39,19 +38,17 @@ static inline void arch_memcpy_to_pmem(void __pmem *dst, const void *src, * fault) we would have already reported a general protection fault * before the WARN+BUG. */ - unwritten = __copy_from_user_inatomic_nocache((void __force *) dst, - (void __user *) src, n); - if (WARN(unwritten, "%s: fault copying %p <- %p unwritten: %d\n", - __func__, dst, src, unwritten)) + rem = __copy_from_user_inatomic_nocache(dst, (void __user *) src, n); + if (WARN(rem, "%s: fault copying %p <- %p unwritten: %d\n", + __func__, dst, src, rem)) BUG(); } -static inline int arch_memcpy_from_pmem(void *dst, const void __pmem *src, - size_t n) +static inline int arch_memcpy_from_pmem(void *dst, const void *src, size_t n) { if (static_cpu_has(X86_FEATURE_MCE_RECOVERY)) - return memcpy_mcsafe(dst, (void __force *) src, n); - memcpy(dst, (void __force *) src, n); + return memcpy_mcsafe(dst, src, n); + memcpy(dst, src, n); return 0; } @@ -63,15 +60,14 @@ static inline int arch_memcpy_from_pmem(void *dst, const void __pmem *src, * Write back a cache range using the CLWB (cache line write back) * instruction. */ -static inline void arch_wb_cache_pmem(void __pmem *addr, size_t size) +static inline void arch_wb_cache_pmem(void *addr, size_t size) { u16 x86_clflush_size = boot_cpu_data.x86_clflush_size; unsigned long clflush_mask = x86_clflush_size - 1; - void *vaddr = (void __force *)addr; - void *vend = vaddr + size; + void *vend = addr + size; void *p; - for (p = (void *)((unsigned long)vaddr & ~clflush_mask); + for (p = (void *)((unsigned long)addr & ~clflush_mask); p < vend; p += x86_clflush_size) clwb(p); } @@ -93,14 +89,13 @@ static inline bool __iter_needs_pmem_wb(struct iov_iter *i) * * Copy data from the iterator 'i' to the PMEM buffer starting at 'addr'. */ -static inline size_t arch_copy_from_iter_pmem(void __pmem *addr, size_t bytes, +static inline size_t arch_copy_from_iter_pmem(void *addr, size_t bytes, struct iov_iter *i) { - void *vaddr = (void __force *)addr; size_t len; /* TODO: skip the write-back by always using non-temporal stores */ - len = copy_from_iter_nocache(vaddr, bytes, i); + len = copy_from_iter_nocache(addr, bytes, i); if (__iter_needs_pmem_wb(i)) arch_wb_cache_pmem(addr, bytes); @@ -115,17 +110,15 @@ static inline size_t arch_copy_from_iter_pmem(void __pmem *addr, size_t bytes, * * Write zeros into the memory range starting at 'addr' for 'size' bytes. */ -static inline void arch_clear_pmem(void __pmem *addr, size_t size) +static inline void arch_clear_pmem(void *addr, size_t size) { - void *vaddr = (void __force *)addr; - - memset(vaddr, 0, size); + memset(addr, 0, size); arch_wb_cache_pmem(addr, size); } -static inline void arch_invalidate_pmem(void __pmem *addr, size_t size) +static inline void arch_invalidate_pmem(void *addr, size_t size) { - clflush_cache_range((void __force *) addr, size); + clflush_cache_range(addr, size); } #endif /* CONFIG_ARCH_HAS_PMEM_API */ #endif /* __ASM_X86_PMEM_H__ */ diff --git a/drivers/acpi/nfit.h b/drivers/acpi/nfit.h index 9fda77cf81da..80fb2c0ac8bf 100644 --- a/drivers/acpi/nfit.h +++ b/drivers/acpi/nfit.h @@ -164,7 +164,7 @@ enum nd_blk_mmio_selector { struct nd_blk_addr { union { void __iomem *base; - void __pmem *aperture; + void *aperture; }; }; diff --git a/drivers/block/brd.c b/drivers/block/brd.c index c04bd9bc39fd..5f1fe4e6208d 100644 --- a/drivers/block/brd.c +++ b/drivers/block/brd.c @@ -381,7 +381,7 @@ static int brd_rw_page(struct block_device *bdev, sector_t sector, #ifdef CONFIG_BLK_DEV_RAM_DAX static long brd_direct_access(struct block_device *bdev, sector_t sector, - void __pmem **kaddr, pfn_t *pfn, long size) + void **kaddr, pfn_t *pfn, long size) { struct brd_device *brd = bdev->bd_disk->private_data; struct page *page; @@ -391,7 +391,7 @@ static long brd_direct_access(struct block_device *bdev, sector_t sector, page = brd_insert_page(brd, sector); if (!page) return -ENOSPC; - *kaddr = (void __pmem *)page_address(page); + *kaddr = page_address(page); *pfn = page_to_pfn_t(page); return PAGE_SIZE; diff --git a/drivers/nvdimm/pmem.c b/drivers/nvdimm/pmem.c index 8bfc6acc2e43..7251b4b6da84 100644 --- a/drivers/nvdimm/pmem.c +++ b/drivers/nvdimm/pmem.c @@ -74,7 +74,7 @@ static int pmem_do_bvec(struct pmem_device *pmem, struct page *page, bool bad_pmem = false; void *mem = kmap_atomic(page); phys_addr_t pmem_off = sector * 512 + pmem->data_offset; - void __pmem *pmem_addr = pmem->virt_addr + pmem_off; + void *pmem_addr = pmem->virt_addr + pmem_off; if (unlikely(is_bad_pmem(&pmem->bb, sector, len))) bad_pmem = true; @@ -173,7 +173,7 @@ static int pmem_rw_page(struct block_device *bdev, sector_t sector, /* see "strong" declaration in tools/testing/nvdimm/pmem-dax.c */ __weak long pmem_direct_access(struct block_device *bdev, sector_t sector, - void __pmem **kaddr, pfn_t *pfn, long size) + void **kaddr, pfn_t *pfn, long size) { struct pmem_device *pmem = bdev->bd_queue->queuedata; resource_size_t offset = sector * 512 + pmem->data_offset; @@ -284,7 +284,7 @@ static int pmem_attach_disk(struct device *dev, if (IS_ERR(addr)) return PTR_ERR(addr); - pmem->virt_addr = (void __pmem *) addr; + pmem->virt_addr = addr; blk_queue_write_cache(q, true, true); blk_queue_make_request(q, pmem_make_request); diff --git a/drivers/nvdimm/pmem.h b/drivers/nvdimm/pmem.h index c48d4e3aa346..b4ee4f71b4a1 100644 --- a/drivers/nvdimm/pmem.h +++ b/drivers/nvdimm/pmem.h @@ -6,7 +6,7 @@ #include <linux/fs.h> long pmem_direct_access(struct block_device *bdev, sector_t sector, - void __pmem **kaddr, pfn_t *pfn, long size); + void **kaddr, pfn_t *pfn, long size); /* this definition is in it's own header for tools/testing/nvdimm to consume */ struct pmem_device { /* One contiguous memory region per device */ @@ -14,7 +14,7 @@ struct pmem_device { /* when non-zero this device is hosting a 'pfn' instance */ phys_addr_t data_offset; u64 pfn_flags; - void __pmem *virt_addr; + void *virt_addr; /* immutable base size of the namespace */ size_t size; /* trim size when namespace capacity has been section aligned */ diff --git a/drivers/s390/block/dcssblk.c b/drivers/s390/block/dcssblk.c index bed53c46dd90..023c5c975dc0 100644 --- a/drivers/s390/block/dcssblk.c +++ b/drivers/s390/block/dcssblk.c @@ -31,7 +31,7 @@ static void dcssblk_release(struct gendisk *disk, fmode_t mode); static blk_qc_t dcssblk_make_request(struct request_queue *q, struct bio *bio); static long dcssblk_direct_access(struct block_device *bdev, sector_t secnum, - void __pmem **kaddr, pfn_t *pfn, long size); + void **kaddr, pfn_t *pfn, long size); static char dcssblk_segments[DCSSBLK_PARM_LEN] = "\0"; @@ -884,7 +884,7 @@ fail: static long dcssblk_direct_access (struct block_device *bdev, sector_t secnum, - void __pmem **kaddr, pfn_t *pfn, long size) + void **kaddr, pfn_t *pfn, long size) { struct dcssblk_dev_info *dev_info; unsigned long offset, dev_sz; @@ -894,7 +894,7 @@ dcssblk_direct_access (struct block_device *bdev, sector_t secnum, return -ENODEV; dev_sz = dev_info->end - dev_info->start; offset = secnum * 512; - *kaddr = (void __pmem *) (dev_info->start + offset); + *kaddr = (void *) dev_info->start + offset; *pfn = __pfn_to_pfn_t(PFN_DOWN(dev_info->start + offset), PFN_DEV); return dev_sz - offset; @@ -75,13 +75,13 @@ static long dax_map_atomic(struct block_device *bdev, struct blk_dax_ctl *dax) struct request_queue *q = bdev->bd_queue; long rc = -EIO; - dax->addr = (void __pmem *) ERR_PTR(-EIO); + dax->addr = ERR_PTR(-EIO); if (blk_queue_enter(q, true) != 0) return rc; rc = bdev_direct_access(bdev, dax); if (rc < 0) { - dax->addr = (void __pmem *) ERR_PTR(rc); + dax->addr = ERR_PTR(rc); blk_queue_exit(q); return rc; } @@ -152,7 +152,7 @@ static ssize_t dax_io(struct inode *inode, struct iov_iter *iter, int rw = iov_iter_rw(iter), rc; long map_len = 0; struct blk_dax_ctl dax = { - .addr = (void __pmem *) ERR_PTR(-EIO), + .addr = ERR_PTR(-EIO), }; unsigned blkbits = inode->i_blkbits; sector_t file_blks = (i_size_read(inode) + (1 << blkbits) - 1) diff --git a/include/linux/blkdev.h b/include/linux/blkdev.h index 3d9cf326574f..fde908b2836b 100644 --- a/include/linux/blkdev.h +++ b/include/linux/blkdev.h @@ -1659,7 +1659,7 @@ static inline bool integrity_req_gap_front_merge(struct request *req, */ struct blk_dax_ctl { sector_t sector; - void __pmem *addr; + void *addr; long size; pfn_t pfn; }; @@ -1670,8 +1670,8 @@ struct block_device_operations { int (*rw_page)(struct block_device *, sector_t, struct page *, int rw); int (*ioctl) (struct block_device *, fmode_t, unsigned, unsigned long); int (*compat_ioctl) (struct block_device *, fmode_t, unsigned, unsigned long); - long (*direct_access)(struct block_device *, sector_t, void __pmem **, - pfn_t *, long); + long (*direct_access)(struct block_device *, sector_t, void **, pfn_t *, + long); unsigned int (*check_events) (struct gendisk *disk, unsigned int clearing); /* ->media_changed() is DEPRECATED, use ->check_events() instead */ diff --git a/include/linux/compiler.h b/include/linux/compiler.h index 793c0829e3a3..b966974938ed 100644 --- a/include/linux/compiler.h +++ b/include/linux/compiler.h @@ -17,7 +17,6 @@ # define __release(x) __context__(x,-1) # define __cond_lock(x,c) ((c) ? ({ __acquire(x); 1; }) : 0) # define __percpu __attribute__((noderef, address_space(3))) -# define __pmem __attribute__((noderef, address_space(5))) #ifdef CONFIG_SPARSE_RCU_POINTER # define __rcu __attribute__((noderef, address_space(4))) #else /* CONFIG_SPARSE_RCU_POINTER */ @@ -45,7 +44,6 @@ extern void __chk_io_ptr(const volatile void __iomem *); # define __cond_lock(x,c) (c) # define __percpu # define __rcu -# define __pmem # define __private # define ACCESS_PRIVATE(p, member) ((p)->member) #endif /* __CHECKER__ */ diff --git a/include/linux/nd.h b/include/linux/nd.h index 1ecd64643512..f1ea426d6a5e 100644 --- a/include/linux/nd.h +++ b/include/linux/nd.h @@ -68,7 +68,7 @@ struct nd_namespace_io { struct nd_namespace_common common; struct resource res; resource_size_t size; - void __pmem *addr; + void *addr; struct badblocks bb; }; diff --git a/include/linux/pmem.h b/include/linux/pmem.h index 9e3ea94b8157..e856c2cb0fe8 100644 --- a/include/linux/pmem.h +++ b/include/linux/pmem.h @@ -26,37 +26,35 @@ * calling these symbols with arch_has_pmem_api() and redirect to the * implementation in asm/pmem.h. */ -static inline void arch_memcpy_to_pmem(void __pmem *dst, const void *src, - size_t n) +static inline void arch_memcpy_to_pmem(void *dst, const void *src, size_t n) { BUG(); } -static inline int arch_memcpy_from_pmem(void *dst, const void __pmem *src, - size_t n) +static inline int arch_memcpy_from_pmem(void *dst, const void *src, size_t n) { BUG(); return -EFAULT; } -static inline size_t arch_copy_from_iter_pmem(void __pmem *addr, size_t bytes, +static inline size_t arch_copy_from_iter_pmem(void *addr, size_t bytes, struct iov_iter *i) { BUG(); return 0; } -static inline void arch_clear_pmem(void __pmem *addr, size_t size) +static inline void arch_clear_pmem(void *addr, size_t size) { BUG(); } -static inline void arch_wb_cache_pmem(void __pmem *addr, size_t size) +static inline void arch_wb_cache_pmem(void *addr, size_t size) { BUG(); } -static inline void arch_invalidate_pmem(void __pmem *addr, size_t size) +static inline void arch_invalidate_pmem(void *addr, size_t size) { BUG(); } @@ -67,13 +65,6 @@ static inline bool arch_has_pmem_api(void) return IS_ENABLED(CONFIG_ARCH_HAS_PMEM_API); } -static inline int default_memcpy_from_pmem(void *dst, void __pmem const *src, - size_t size) -{ - memcpy(dst, (void __force *) src, size); - return 0; -} - /* * memcpy_from_pmem - read from persistent memory with error handling * @dst: destination buffer @@ -82,40 +73,13 @@ static inline int default_memcpy_from_pmem(void *dst, void __pmem const *src, * * Returns 0 on success negative error code on failure. */ -static inline int memcpy_from_pmem(void *dst, void __pmem const *src, - size_t size) +static inline int memcpy_from_pmem(void *dst, void const *src, size_t size) { if (arch_has_pmem_api()) return arch_memcpy_from_pmem(dst, src, size); else - return default_memcpy_from_pmem(dst, src, size); -} - -/* - * These defaults seek to offer decent performance and minimize the - * window between i/o completion and writes being durable on media. - * However, it is undefined / architecture specific whether - * ARCH_MEMREMAP_PMEM + default_memcpy_to_pmem is sufficient for - * making data durable relative to i/o completion. - */ -static inline void default_memcpy_to_pmem(void __pmem *dst, const void *src, - size_t size) -{ - memcpy((void __force *) dst, src, size); -} - -static inline size_t default_copy_from_iter_pmem(void __pmem *addr, - size_t bytes, struct iov_iter *i) -{ - return copy_from_iter_nocache((void __force *)addr, bytes, i); -} - -static inline void default_clear_pmem(void __pmem *addr, size_t size) -{ - if (size == PAGE_SIZE && ((unsigned long)addr & ~PAGE_MASK) == 0) - clear_page((void __force *)addr); - else - memset((void __force *)addr, 0, size); + memcpy(dst, src, size); + return 0; } /** @@ -130,12 +94,12 @@ static inline void default_clear_pmem(void __pmem *addr, size_t size) * data may still reside in cpu or platform buffers, so this operation * must be followed by a blkdev_issue_flush() on the pmem block device. */ -static inline void memcpy_to_pmem(void __pmem *dst, const void *src, size_t n) +static inline void memcpy_to_pmem(void *dst, const void *src, size_t n) { if (arch_has_pmem_api()) arch_memcpy_to_pmem(dst, src, n); else - default_memcpy_to_pmem(dst, src, n); + memcpy(dst, src, n); } /** @@ -147,12 +111,12 @@ static inline void memcpy_to_pmem(void __pmem *dst, const void *src, size_t n) * Copy data from the iterator 'i' to the PMEM buffer starting at 'addr'. * See blkdev_issue_flush() note for memcpy_to_pmem(). */ -static inline size_t copy_from_iter_pmem(void __pmem *addr, size_t bytes, +static inline size_t copy_from_iter_pmem(void *addr, size_t bytes, struct iov_iter *i) { if (arch_has_pmem_api()) return arch_copy_from_iter_pmem(addr, bytes, i); - return default_copy_from_iter_pmem(addr, bytes, i); + return copy_from_iter_nocache(addr, bytes, i); } /** @@ -163,12 +127,12 @@ static inline size_t copy_from_iter_pmem(void __pmem *addr, size_t bytes, * Write zeros into the memory range starting at 'addr' for 'size' bytes. * See blkdev_issue_flush() note for memcpy_to_pmem(). */ -static inline void clear_pmem(void __pmem *addr, size_t size) +static inline void clear_pmem(void *addr, size_t size) { if (arch_has_pmem_api()) arch_clear_pmem(addr, size); else - default_clear_pmem(addr, size); + memset(addr, 0, size); } /** @@ -179,7 +143,7 @@ static inline void clear_pmem(void __pmem *addr, size_t size) * For platforms that support clearing poison this flushes any poisoned * ranges out of the cache */ -static inline void invalidate_pmem(void __pmem *addr, size_t size) +static inline void invalidate_pmem(void *addr, size_t size) { if (arch_has_pmem_api()) arch_invalidate_pmem(addr, size); @@ -193,7 +157,7 @@ static inline void invalidate_pmem(void __pmem *addr, size_t size) * Write back the processor cache range starting at 'addr' for 'size' bytes. * See blkdev_issue_flush() note for memcpy_to_pmem(). */ -static inline void wb_cache_pmem(void __pmem *addr, size_t size) +static inline void wb_cache_pmem(void *addr, size_t size) { if (arch_has_pmem_api()) arch_wb_cache_pmem(addr, size); diff --git a/scripts/checkpatch.pl b/scripts/checkpatch.pl index 4904ced676d4..24a08363995a 100755 --- a/scripts/checkpatch.pl +++ b/scripts/checkpatch.pl @@ -313,7 +313,6 @@ our $Sparse = qr{ __kernel| __force| __iomem| - __pmem| __must_check| __init_refok| __kprobes| diff --git a/tools/testing/nvdimm/pmem-dax.c b/tools/testing/nvdimm/pmem-dax.c index 1e0218ce6a8b..c9b8c48f85fc 100644 --- a/tools/testing/nvdimm/pmem-dax.c +++ b/tools/testing/nvdimm/pmem-dax.c @@ -16,7 +16,7 @@ #include <nd.h> long pmem_direct_access(struct block_device *bdev, sector_t sector, - void __pmem **kaddr, pfn_t *pfn, long size) + void **kaddr, pfn_t *pfn, long size) { struct pmem_device *pmem = bdev->bd_queue->queuedata; resource_size_t offset = sector * 512 + pmem->data_offset; |