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# 256eab48 07-May-2021 Andrii Nakryiko <andrii@kernel.org>

selftests/bpf: Stop using static variables for passing data to/from user-space

In preparation of skipping emitting static variables in BPF skeletons, switch
all current selftests uses of static vari

selftests/bpf: Stop using static variables for passing data to/from user-space

In preparation of skipping emitting static variables in BPF skeletons, switch
all current selftests uses of static variables to pass data between BPF and
user-space to use global variables.

All non-read-only `static volatile` variables become just plain global
variables by dropping `static volatile` part.

Read-only `static volatile const` variables, though, still require `volatile`
modifier, otherwise compiler will ignore whatever values are set from
user-space.

Few static linker tests are using name-conflicting static variables to
validate that static linker still properly handles static variables and
doesn't trip up on name conflicts.

Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210507054119.270888-4-andrii@kernel.org

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Revision tags: v5.10.34, v5.4.116, v5.10.33, v5.12, v5.10.32
# c2e39c6b 19-Apr-2021 Florent Revest <revest@chromium.org>

selftests/bpf: Add a series of tests for bpf_snprintf

The "positive" part tests all format specifiers when things go well.

The "negative" part makes sure that incorrect format strings fail at
load

selftests/bpf: Add a series of tests for bpf_snprintf

The "positive" part tests all format specifiers when things go well.

The "negative" part makes sure that incorrect format strings fail at
load time.

Signed-off-by: Florent Revest <revest@chromium.org>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20210419155243.1632274-7-revest@chromium.org

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