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bpf: Convert bpf_get_spilled_reg macro to static inline function

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Convert the bpf_get_spilled_reg() macro to a static inline function
for better type safety and readability. This also simplifies the macro
definition in preparation for upcoming stack argument support which
will introduce additional macros.

No functional change.

Signed-off-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20260513044954.2382693-1-yonghong.song@linux.dev
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Yonghong Song 2026-05-12 21:49:54 -07:00 committed by Alexei Starovoitov
parent 6318f11d53
commit ede2dc5c6b
1 changed files with 8 additions and 4 deletions
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12
include/linux/bpf_verifier.h
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@ -552,10 +552,14 @@ struct bpf_verifier_state {
u32 may_goto_depth;
};
#define bpf_get_spilled_reg(slot, frame, mask) \
(((slot < frame->allocated_stack / BPF_REG_SIZE) && \
((1 << frame->stack[slot].slot_type[BPF_REG_SIZE - 1]) & (mask))) \
? &frame->stack[slot].spilled_ptr : NULL)
static inline struct bpf_reg_state *
bpf_get_spilled_reg(int slot, struct bpf_func_state *frame, u32 mask)
{
if (slot < frame->allocated_stack / BPF_REG_SIZE &&
(1 << frame->stack[slot].slot_type[BPF_REG_SIZE - 1]) & mask)
return &frame->stack[slot].spilled_ptr;
return NULL;
}
/* Iterate over 'frame', setting 'reg' to either NULL or a spilled register. */
#define bpf_for_each_spilled_reg(iter, frame, reg, mask) \