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authorVishal Verma <vishal.l.verma@intel.com>2017-05-11 00:01:30 +0300
committerDan Williams <dan.j.williams@intel.com>2017-05-11 07:46:22 +0300
commit3ae3d67ba705c754a3c91ac009f9ce73a0e7286a (patch)
tree0163a4ca204ab5f9601f12ee3c6fcfdb45a16459 /drivers/nvdimm/nd.h
parent8376efd31d3d7c44bd05be337adde023cc531fa1 (diff)
downloadlinux-3ae3d67ba705c754a3c91ac009f9ce73a0e7286a.tar.xz
libnvdimm: add an atomic vs process context flag to rw_bytes
nsio_rw_bytes can clear media errors, but this cannot be done while we are in an atomic context due to locking within ACPI. From the BTT, ->rw_bytes may be called either from atomic or process context depending on whether the calls happen during initialization or during IO. During init, we want to ensure error clearing happens, and the flag marking process context allows nsio_rw_bytes to do that. When called during IO, we're in atomic context, and error clearing can be skipped. Cc: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Vishal Verma <vishal.l.verma@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/nvdimm/nd.h')
-rw-r--r--drivers/nvdimm/nd.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/nvdimm/nd.h b/drivers/nvdimm/nd.h
index 77d032192bf7..03852d738eec 100644
--- a/drivers/nvdimm/nd.h
+++ b/drivers/nvdimm/nd.h
@@ -31,6 +31,7 @@ enum {
ND_MAX_LANES = 256,
SECTOR_SHIFT = 9,
INT_LBASIZE_ALIGNMENT = 64,
+ NVDIMM_IO_ATOMIC = 1,
};
struct nd_poison {