LoongArch: BPF: Don't assume trampoline size is page aligned

chenhengqi · Kernel Patches Daemon · commit 45f413443c95 · 2025-09-03T16:51:58.000-07:00
Currently, arch_alloc_bpf_trampoline() use bpf_prog_pack_alloc()
which will pack multiple trampolines into a huge page. So no need
to assume the trampoline size is page aligned.

Signed-off-by: Hengqi Chen &lt;hengqi.chen@gmail.com&gt;
diff --git a/arch/loongarch/net/bpf_jit.c b/arch/loongarch/net/bpf_jit.c
@@ -1747,8 +1747,7 @@ int arch_bpf_trampoline_size(const struct btf_func_model *m, u32 flags,
 
 	ret = __arch_prepare_bpf_trampoline(&ctx, &im, m, tlinks, func_addr, flags);
 
-	/* Page align */
-	return ret < 0 ? ret : round_up(ret * LOONGARCH_INSN_SIZE, PAGE_SIZE);
+	return ret < 0 ? ret : ret * LOONGARCH_INSN_SIZE;
 }
 
 struct bpf_prog *bpf_int_jit_compile(struct bpf_prog *prog)

Original file line number	Diff line number	Diff line change
`@@ -1747,8 +1747,7 @@ int arch_bpf_trampoline_size(const struct btf_func_model *m, u32 flags,`
`1747`	`1747`
`1748`	`1748`	`ret = __arch_prepare_bpf_trampoline(&ctx, &im, m, tlinks, func_addr, flags);`
`1749`	`1749`
`1750`		`- /* Page align */`
`1751`		`- return ret < 0 ? ret : round_up(ret * LOONGARCH_INSN_SIZE, PAGE_SIZE);`
	`1750`	`+ return ret < 0 ? ret : ret * LOONGARCH_INSN_SIZE;`
`1752`	`1751`	`}`
`1753`	`1752`
`1754`	`1753`	`struct bpf_prog bpf_int_jit_compile(struct bpf_prog prog)`