Messages in this thread | | | Date | Mon, 12 Jun 2023 15:56:10 -0600 | Subject | Re: [PATCH v2] selftests: prctl: Add new prctl test for PR_SET_NAME | From | Shuah Khan <> |
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On 6/10/23 07:01, Osama Muhammad wrote: > Hi all, > > I looked into it and tried to use TASK_COMM_LEN in the test. Even > though I included "linux/sched.h '', I was not able to compile the > test because it couldn't find it in the header file. > I dived deep into the issue and turns out header file mapped in > /usr/include/linux/sched.h is actually mapped to > /include/uapi/linux/sched.h[1] in linux source, > where TASK_COMM_LEN is not even defined. Instead TASK_COMM_LEN is > defined in /include/linux/sched.h which is not mapped to any header > files in > userspace(/(/usr/include/linux). > I also tried to find the TASK_COM_LEN in /usr/include/linux/ but I > couldn't find it. Following are the search results. > grep -rnw '/usr/include/linux/' -e 'TASK_COMM_LEN" > RESULTS OF COMMAND :- /usr/include/linux/taskstats.h:38:#define > TS_COMM_LEN 32 /* should be >= TASK_COMM_LEN > Based on this information, I have two questions: > 1. Would this require a fix to move 'TASK_COMM_LEN' macro from > /include/linux/sched.h to UAPI headers /include/uapi/linux/sched.h. > 2. Is there any other way to access TASK_COMM_LEN in the selftest that > I'm not aware of? > > [1]:-https://elixir.bootlin.com/linux/v5.15.116/source/include/uapi/linux/sched.h >
The best source is Linux mainline.
Take a look at test files that include linux/sched.h
arm64/abi/tpidr2.c is one of them.
Did you install headers before compiling the test? make headers_install
thanks, -- Shuah
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