selftests/exec: let binfmt_flag_supported() return a bool

binfmt_flag_supported() returns 0 when the flag is supported and -1
when it is not, so every caller reads backwards:

	if (binfmt_flag_supported('T'))
		SKIP(return, "kernel without the 'T' flag");

Make it return a bool and flip the callers. errno from a failed probe
is still set for callers that check it.

Link: https://patch.msgid.link/20260730-work-binfmt_misc-preopen-v1-2-4a0b0da71f16@kernel.org
Signed-off-by: Christian Brauner (Amutable) <brauner@kernel.org>
Reviewed-by: Farid Zakaria <farid.m.zakaria@gmail.com>

0 files changed, 0 insertions, 0 deletions