diff options
author | Juergen Gross <jgross@suse.com> | 2014-11-03 14:01:54 +0100 |
---|---|---|
committer | Thomas Gleixner <tglx@linutronix.de> | 2014-11-16 11:04:25 +0100 |
commit | 49a3b3cbdf1621678a39bd95a3e67c0f858539c7 (patch) | |
tree | fb59b9624d615faf4a3e32dec9bde28d53863a4c /arch/x86/mm | |
parent | d85f33342a0f57acfbe078cdd0c4f590d5608bb7 (diff) | |
download | op-kernel-dev-49a3b3cbdf1621678a39bd95a3e67c0f858539c7.zip op-kernel-dev-49a3b3cbdf1621678a39bd95a3e67c0f858539c7.tar.gz |
x86: Use new cache mode type in mm/iomap_32.c
Instead of directly using the cache mode bits in the pte switch to
using the cache mode type. This requires to change
io_reserve_memtype() as well.
Based-on-patch-by: Stefan Bader <stefan.bader@canonical.com>
Signed-off-by: Juergen Gross <jgross@suse.com>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: stefan.bader@canonical.com
Cc: xen-devel@lists.xensource.com
Cc: konrad.wilk@oracle.com
Cc: ville.syrjala@linux.intel.com
Cc: david.vrabel@citrix.com
Cc: jbeulich@suse.com
Cc: toshi.kani@hp.com
Cc: plagnioj@jcrosoft.com
Cc: tomi.valkeinen@ti.com
Cc: bhelgaas@google.com
Link: http://lkml.kernel.org/r/1415019724-4317-9-git-send-email-jgross@suse.com
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'arch/x86/mm')
-rw-r--r-- | arch/x86/mm/iomap_32.c | 12 | ||||
-rw-r--r-- | arch/x86/mm/pat.c | 18 |
2 files changed, 17 insertions, 13 deletions
diff --git a/arch/x86/mm/iomap_32.c b/arch/x86/mm/iomap_32.c index 7b179b49..9ca35fc 100644 --- a/arch/x86/mm/iomap_32.c +++ b/arch/x86/mm/iomap_32.c @@ -33,17 +33,17 @@ static int is_io_mapping_possible(resource_size_t base, unsigned long size) int iomap_create_wc(resource_size_t base, unsigned long size, pgprot_t *prot) { - unsigned long flag = _PAGE_CACHE_WC; + enum page_cache_mode pcm = _PAGE_CACHE_MODE_WC; int ret; if (!is_io_mapping_possible(base, size)) return -EINVAL; - ret = io_reserve_memtype(base, base + size, &flag); + ret = io_reserve_memtype(base, base + size, &pcm); if (ret) return ret; - *prot = __pgprot(__PAGE_KERNEL | flag); + *prot = __pgprot(__PAGE_KERNEL | cachemode2protval(pcm)); return 0; } EXPORT_SYMBOL_GPL(iomap_create_wc); @@ -82,8 +82,10 @@ iomap_atomic_prot_pfn(unsigned long pfn, pgprot_t prot) * MTRR is UC or WC. UC_MINUS gets the real intention, of the * user, which is "WC if the MTRR is WC, UC if you can't do that." */ - if (!pat_enabled && pgprot_val(prot) == pgprot_val(PAGE_KERNEL_WC)) - prot = PAGE_KERNEL_UC_MINUS; + if (!pat_enabled && pgprot_val(prot) == + (__PAGE_KERNEL | cachemode2protval(_PAGE_CACHE_MODE_WC))) + prot = __pgprot(__PAGE_KERNEL | + cachemode2protval(_PAGE_CACHE_MODE_UC_MINUS)); return (void __force __iomem *) kmap_atomic_prot_pfn(pfn, prot); } diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c index 47282c2..6d5a8e3 100644 --- a/arch/x86/mm/pat.c +++ b/arch/x86/mm/pat.c @@ -442,25 +442,27 @@ static unsigned long lookup_memtype(u64 paddr) * On failure, returns non-zero */ int io_reserve_memtype(resource_size_t start, resource_size_t end, - unsigned long *type) + enum page_cache_mode *type) { resource_size_t size = end - start; - unsigned long req_type = *type; - unsigned long new_type; + enum page_cache_mode req_type = *type; + enum page_cache_mode new_type; + unsigned long new_prot; int ret; WARN_ON_ONCE(iomem_map_sanity_check(start, size)); - ret = reserve_memtype(start, end, req_type, &new_type); + ret = reserve_memtype(start, end, cachemode2protval(req_type), + &new_prot); if (ret) goto out_err; - if (!is_new_memtype_allowed(start, size, - pgprot2cachemode(__pgprot(req_type)), - pgprot2cachemode(__pgprot(new_type)))) + new_type = pgprot2cachemode(__pgprot(new_prot)); + + if (!is_new_memtype_allowed(start, size, req_type, new_type)) goto out_free; - if (kernel_map_sync_memtype(start, size, new_type) < 0) + if (kernel_map_sync_memtype(start, size, new_prot) < 0) goto out_free; *type = new_type; |