[ Upstream commit f1797e4de1 ]
module_alloc() first tries to allocate module text within 24 bits direct
jump from kernel text, and tries a wider allocation if first one fails.
When first allocation fails the following is observed in kernel logs:
vmap allocation for size 2400256 failed: use vmalloc=<size> to increase size
systemd-udevd: vmalloc error: size 2395133, vm_struct allocation failed, mode:0xcc0(GFP_KERNEL), nodemask=(null)
CPU: 0 PID: 127 Comm: systemd-udevd Tainted: G W 5.15.5-gentoo-PowerMacG4 #9
Call Trace:
[e2a53a50] [c0ba0048] dump_stack_lvl+0x80/0xb0 (unreliable)
[e2a53a70] [c0540128] warn_alloc+0x11c/0x2b4
[e2a53b50] [c0531be8] __vmalloc_node_range+0xd8/0x64c
[e2a53c10] [c00338c0] module_alloc+0xa0/0xac
[e2a53c40] [c027a368] load_module+0x2ae0/0x8148
[e2a53e30] [c027fc78] sys_finit_module+0xfc/0x130
[e2a53f30] [c0035098] ret_from_syscall+0x0/0x28
...
Add __GFP_NOWARN flag to first allocation so that no warning appears
when it fails.
Reported-by: Erhard Furtner <erhard_f@mailbox.org>
Fixes: 2ec13df167 ("powerpc/modules: Load modules closer to kernel text")
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/93c9b84d6ec76aaf7b4f03468e22433a6d308674.1638267035.git.christophe.leroy@csgroup.eu
Signed-off-by: Sasha Levin <sashal@kernel.org>
2d17ab8874