[PATCH v2 0/4] Assigning NULL to gfn of dax_direct_access if useless
From: Huaisheng Ye
Date: Wed Jul 04 2018 - 12:40:24 EST
From: Huaisheng Ye <yehs1@xxxxxxxxxx>
Changes since v1 :
* Collect Jan's reviewed-by.
* According to Dan's suggestion, update the unit test infrastructure
tools/testing/nvdimm/pmem-dax.c for checking the validity of gfn.
Some functions within fs/dax don't need to get gfn from direct_access.
Assigning NULL to gfn of dax_direct_access is more intuitive and simple
than offering a useless local variable.
So all direct_access need to check the validity of pointer pfn for NULL
assignment. If pfn equals to NULL, it doesn't need to calculate its value.
Huaisheng Ye (4):
nvdimm/pmem: check the validity of the pointer pfn
nvdimm/pmem-dax: check the validity of the pointer pfn
s390/block/dcssblk: check the validity of the pointer pfn
fs/dax: Assign NULL to gfn of dax_direct_access if useless
drivers/nvdimm/pmem.c | 3 ++-
drivers/s390/block/dcssblk.c | 3 ++-
fs/dax.c | 9 +++------
tools/testing/nvdimm/pmem-dax.c | 6 ++++--
4 files changed, 11 insertions(+), 10 deletions(-)