Re: [PATCH v3] uapi: expose enum pid_type as enum __kernel_pidtype

On Sat, Aug 07, 2021 at 02:09:05PM +0200, Eugene Syromiatnikov wrote:

Commit 7ac592aa35a684ff ("sched: prctl() core-scheduling interface")
made use of enum pid_type in prctl's arg4;  however, this type
and the associated enumeration definitions are not exposed to userspace.
Try to fix that by providing enum __kernel_pidtype and tying in-kernel
enum pid_type definitions to it.  Note that enum pid_type cannot be exposed
as is, since "enum pid_type" is already exists in various projects [1]

Grammar: "enum pid_type" already exists.

(notably gcc and strace), and "enum __pid_type" is defined by glibc and uclibc
for fcntl(F_SETOWN_EX) owner ID type;  there is also __kernel_pid_t,
that looks too similar to __kernel_pid_type.

[1] https://codesearch.debian.net/search?q=enum+pid_type

Complements: 7ac592aa35a684ff ("sched: prctl() core-scheduling interface")
Signed-off-by: Eugene Syromiatnikov <redacted>

Reviewed-by: Dmitry V. Levin <redacted>


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