[LU-16241] Kernel 3.10 Build Fail on Master (3ffcb5b70) with NL_SET_ERR_MSG not defined

Related — Wed, 2 Nov 2022 14:58:22 +0000

Master is at: 3ffcb5b70

Kernel : 3.10

Build falied with:

make[3]: Entering directory `/usr/src/kernels/3.10.0-957.el7_lustre.x86_64'
  CC [M]  /root/mrp/lustre-xx-3.10/lustre-release/lustre/obdclass/kernelcomm.o
  CC [M]  /root/mrp/lustre-xx-3.10/lustre-release/lustre/osp/osp_dev.o
/root/mrp/lustre-xx-3.10/lustre-release/lustre/obdclass/kernelcomm.c: In function ‘lustre_device_list_start’:
/root/mrp/lustre-xx-3.10/lustre-release/lustre/obdclass/kernelcomm.c:151:4: error: implicit declaration of function ‘NL_SET_ERR_MSG’ [-Werror=implicit-function-declaration]
    NL_SET_ERR_MSG(extack, "No devices found");
    ^
/root/mrp/lustre-xx-3.10/lustre-release/lustre/obdclass/kernelcomm.c:151:19: error: ‘extack’ undeclared (first use in this function)
    NL_SET_ERR_MSG(extack, "No devices found");
                   ^
/root/mrp/lustre-xx-3.10/lustre-release/lustre/obdclass/kernelcomm.c:151:19: note: each undeclared identifier is reported only once for each function it appears in
/root/mrp/lustre-xx-3.10/lustre-release/lustre/obdclass/kernelcomm.c: In function ‘lustre_device_list_dump’:
/root/mrp/lustre-xx-3.10/lustre-release/lustre/obdclass/kernelcomm.c:188:19: error: ‘extack’ undeclared (first use in this function)
    NL_SET_ERR_MSG(extack, "failed to send key table");

Looks like NL_SET_ERR_MSG is defined under net/genetlink.h after 4.x kernel. Not available under 3.X kernel. Works on 4.18

Whamcloud Community JIRA

[LU-16241] Kernel 3.10 Build Fail on Master (3ffcb5b70) with NL_SET_ERR_MSG not defined