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authorHuaisheng Ye <yehs1@lenovo.com>2018-07-30 15:15:44 +0800
committerDave Jiang <dave.jiang@intel.com>2018-07-30 09:33:03 -0700
commit036a82ca90328960d66b7a5c0e1908475d534d62 (patch)
tree50053f26cf4512ba0bdcc9e305d2696d8d0641de /tools/testing/nvdimm
parentlibnvdimm, pmem: kaddr and pfn can be NULL to ->direct_access() (diff)
downloadlinux-dev-036a82ca90328960d66b7a5c0e1908475d534d62.tar.xz
linux-dev-036a82ca90328960d66b7a5c0e1908475d534d62.zip
s390, dcssblk: kaddr and pfn can be NULL to ->direct_access()
dcssblk_direct_access() needs to check the validity of pointers kaddr and pfn for NULL assignment. If anyone equals to NULL, it doesn't need to calculate the value. If either of them is equal to NULL, that is to say callers may have no need for kaddr or pfn, so this patch is prepared for allowing them to pass in NULL instead of having to pass in a pointer or local variable that they then just throw away. Signed-off-by: Huaisheng Ye <yehs1@lenovo.com> Reviewed-by: Ross Zwisler <ross.zwisler@linux.intel.com> Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Dave Jiang <dave.jianig@intel.com>
Diffstat (limited to 'tools/testing/nvdimm')
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