we zero it anyway on setuid, so we can repurpose it to prevent a recheck.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to prevent a recheck.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

A temporay Kconfig entry is added in case there is a need to disable this for tests.

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

Co-Authored-By: weishu <twsxtd@gmail.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>

we zero it anyway on setuid, so we can repurpose it to speedup return checks.
we abuse the fact that task_struct is real hot.

upstream is doing the same thing anyway. set something on task_struct and use it to check.
ref: tiann#2866

rebase of: 36348f2

Signed-off-by: backslashxx <118538522+backslashxx@users.noreply.github.com>