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| author | Dan Williams <dan.j.williams@intel.com> | 2015-08-10 23:07:06 -0400 |
|---|---|---|
| committer | Dan Williams <dan.j.williams@intel.com> | 2015-08-10 23:07:06 -0400 |
| commit | 92b19ff50e8f242392d78b2aacc5b5b672f1796b (patch) | |
| tree | 463927d91228174419ba1fe327f3cec6b9a2615a /drivers/scsi/arcmsr/arcmsr_hba.c | |
| parent | 2584cf83578c26db144730ef498f4070f82ee3ea (diff) | |
| download | lwn-92b19ff50e8f242392d78b2aacc5b5b672f1796b.tar.gz lwn-92b19ff50e8f242392d78b2aacc5b5b672f1796b.zip | |
cleanup IORESOURCE_CACHEABLE vs ioremap()
Quoting Arnd:
I was thinking the opposite approach and basically removing all uses
of IORESOURCE_CACHEABLE from the kernel. There are only a handful of
them.and we can probably replace them all with hardcoded
ioremap_cached() calls in the cases they are actually useful.
All existing usages of IORESOURCE_CACHEABLE call ioremap() instead of
ioremap_nocache() if the resource is cacheable, however ioremap() is
uncached by default. Clearly none of the existing usages care about the
cacheability. Particularly devm_ioremap_resource() never worked as
advertised since it always fell back to plain ioremap().
Clean this up as the new direction we want is to convert
ioremap_<type>() usages to memremap(..., flags).
Suggested-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/scsi/arcmsr/arcmsr_hba.c')
| -rw-r--r-- | drivers/scsi/arcmsr/arcmsr_hba.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/drivers/scsi/arcmsr/arcmsr_hba.c b/drivers/scsi/arcmsr/arcmsr_hba.c index 914c39f9f388..e4f77cad9fd8 100644 --- a/drivers/scsi/arcmsr/arcmsr_hba.c +++ b/drivers/scsi/arcmsr/arcmsr_hba.c @@ -259,10 +259,7 @@ static bool arcmsr_remap_pciregion(struct AdapterControlBlock *acb) addr = (unsigned long)pci_resource_start(pdev, 0); range = pci_resource_len(pdev, 0); flags = pci_resource_flags(pdev, 0); - if (flags & IORESOURCE_CACHEABLE) - mem_base0 = ioremap(addr, range); - else - mem_base0 = ioremap_nocache(addr, range); + mem_base0 = ioremap(addr, range); if (!mem_base0) { pr_notice("arcmsr%d: memory mapping region fail\n", acb->host->host_no); |