mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-02 07:04:24 +00:00
b21bd5a4b1
Trying to build a .c file that includes <linux/bpf_perf_event.h>:
$ cat test_bpf_headers.c
#include <linux/bpf_perf_event.h>
throws the below error:
/usr/include/linux/bpf_perf_event.h:14:28: error: field ‘regs’ has incomplete type
14 | bpf_user_pt_regs_t regs;
| ^~~~
This is because we typedef bpf_user_pt_regs_t to 'struct user_pt_regs'
in arch/powerpc/include/uaps/asm/bpf_perf_event.h, but 'struct
user_pt_regs' is not exposed to userspace.
Powerpc has both pt_regs and user_pt_regs structures. However, unlike
arm64 and s390, we expose user_pt_regs to userspace as just 'pt_regs'.
As such, we should typedef bpf_user_pt_regs_t to 'struct pt_regs' for
userspace.
Within the kernel though, we want to typedef bpf_user_pt_regs_t to
'struct user_pt_regs'.
Remove arch/powerpc/include/uapi/asm/bpf_perf_event.h so that the
uapi/asm-generic version of the header is exposed to userspace.
Introduce arch/powerpc/include/asm/bpf_perf_event.h so that we can
typedef bpf_user_pt_regs_t to 'struct user_pt_regs' for use within the
kernel.
Note that this was not showing up with the bpf selftest build since
tools/include/uapi/asm/bpf_perf_event.h didn't include the powerpc
variant.
Fixes:
|
||
---|---|---|
.. | ||
auxvec.h | ||
bitsperlong.h | ||
bootx.h | ||
byteorder.h | ||
cputable.h | ||
eeh.h | ||
elf.h | ||
epapr_hcalls.h | ||
errno.h | ||
fcntl.h | ||
ioctl.h | ||
ioctls.h | ||
ipcbuf.h | ||
Kbuild | ||
kvm.h | ||
kvm_para.h | ||
mman.h | ||
msgbuf.h | ||
nvram.h | ||
opal-prd.h | ||
papr_pdsm.h | ||
perf_event.h | ||
perf_regs.h | ||
posix_types.h | ||
ps3fb.h | ||
ptrace.h | ||
sembuf.h | ||
setup.h | ||
shmbuf.h | ||
sigcontext.h | ||
signal.h | ||
socket.h | ||
spu_info.h | ||
stat.h | ||
swab.h | ||
termbits.h | ||
termios.h | ||
tm.h | ||
types.h | ||
ucontext.h | ||
unistd.h | ||
vas-api.h |