#ifndef _ASM_ARM_XEN_PAGE_H #define _ASM_ARM_XEN_PAGE_H #include #include #include #include #include #include #include #define phys_to_machine_mapping_valid(pfn) (1) /* Xen machine address */ typedef struct xmaddr { phys_addr_t maddr; } xmaddr_t; /* Xen pseudo-physical address */ typedef struct xpaddr { phys_addr_t paddr; } xpaddr_t; #define XMADDR(x) ((xmaddr_t) { .maddr = (x) }) #define XPADDR(x) ((xpaddr_t) { .paddr = (x) }) #define INVALID_P2M_ENTRY (~0UL) /* * The pseudo-physical frame (pfn) used in all the helpers is always based * on Xen page granularity (i.e 4KB). * * A Linux page may be split across multiple non-contiguous Xen page so we * have to keep track with frame based on 4KB page granularity. * * PV drivers should never make a direct usage of those helpers (particularly * pfn_to_gfn and gfn_to_pfn). */ unsigned long __pfn_to_mfn(unsigned long pfn); extern struct rb_root phys_to_mach; /* Pseudo-physical <-> Guest conversion */ static inline unsigned long pfn_to_gfn(unsigned long pfn) { return pfn; } static inline unsigned long gfn_to_pfn(unsigned long gfn) { return gfn; } /* Pseudo-physical <-> BUS conversion */ static inline unsigned long pfn_to_bfn(unsigned long pfn) { unsigned long mfn; if (phys_to_mach.rb_node != NULL) { mfn = __pfn_to_mfn(pfn); if (mfn != INVALID_P2M_ENTRY) return mfn; } return pfn; } static inline unsigned long bfn_to_pfn(unsigned long bfn) { return bfn; } #define bfn_to_local_pfn(bfn) bfn_to_pfn(bfn) /* VIRT <-> GUEST conversion */ #define virt_to_gfn(v) (pfn_to_gfn(virt_to_phys(v) >> XEN_PAGE_SHIFT)) #define gfn_to_virt(m) (__va(gfn_to_pfn(m) << XEN_PAGE_SHIFT)) /* Only used in PV code. But ARM guests are always HVM. */ static inline xmaddr_t arbitrary_virt_to_machine(void *vaddr) { BUG(); } /* TODO: this shouldn't be here but it is because the frontend drivers * are using it (its rolled in headers) even though we won't hit the code path. * So for right now just punt with this. */ static inline pte_t *lookup_address(unsigned long address, unsigned int *level) { BUG(); return NULL; } extern int set_foreign_p2m_mapping(struct gnttab_map_grant_ref *map_ops, struct gnttab_map_grant_ref *kmap_ops, struct page **pages, unsigned int count); extern int clear_foreign_p2m_mapping(struct gnttab_unmap_grant_ref *unmap_ops, struct gnttab_unmap_grant_ref *kunmap_ops, struct page **pages, unsigned int count); bool __set_phys_to_machine(unsigned long pfn, unsigned long mfn); bool __set_phys_to_machine_multi(unsigned long pfn, unsigned long mfn, unsigned long nr_pages); static inline bool set_phys_to_machine(unsigned long pfn, unsigned long mfn) { return __set_phys_to_machine(pfn, mfn); } #define xen_remap(cookie, size) ioremap_cache((cookie), (size)) #define xen_unmap(cookie) iounmap((cookie)) bool xen_arch_need_swiotlb(struct device *dev, phys_addr_t phys, dma_addr_t dev_addr); unsigned long xen_get_swiotlb_free_pages(unsigned int order); #endif /* _ASM_ARM_XEN_PAGE_H */ vate-remove&id=eeeefd41843218c55a8782a6920f044d9bf6207a'>x25/x25_out.c
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authorChristoph Hellwig <hch@lst.de>2017-02-05 18:10:35 +0100
committerJens Axboe <axboe@fb.com>2017-02-06 09:34:46 -0700
commiteeeefd41843218c55a8782a6920f044d9bf6207a (patch)
treec342eac46626e62745aa8e1a982626efca8b121d /net/x25/x25_out.c
parentc14024dbb156c8392908aaa822097d27c6af8ec8 (diff)
block: don't try Write Same from __blkdev_issue_zeroout
Write Same can return an error asynchronously if it turns out the underlying SCSI device does not support Write Same, which makes a proper fallback to other methods in __blkdev_issue_zeroout impossible. Thus only issue a Write Same from blkdev_issue_zeroout an don't try it at all from __blkdev_issue_zeroout as a non-invasive workaround. Signed-off-by: Christoph Hellwig <hch@lst.de> Reported-by: Junichi Nomura <j-nomura@ce.jp.nec.com> Fixes: e73c23ff ("block: add async variant of blkdev_issue_zeroout") Tested-by: Junichi Nomura <j-nomura@ce.jp.nec.com> Signed-off-by: Jens Axboe <axboe@fb.com>
Diffstat (limited to 'net/x25/x25_out.c')