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dbac14a5a0
EXPORT_SYMBOL and __init is a bad combination because the .init.text
section is freed up after the initialization. Hence, modules cannot
use symbols annotated __init. The access to a freed symbol may end up
with kernel panic.
modpost used to detect it, but it has been broken for a decade.
Recently, I fixed modpost so it started to warn it again, then this
showed up in linux-next builds.
There are two ways to fix it:
- Remove __init
- Remove EXPORT_SYMBOL
I chose the latter for this case because none of the in-tree call-sites
(arch/arm/xen/enlighten.c, arch/x86/xen/grant-table.c) is compiled as
modular.
Fixes:
|
||
---|---|---|
.. | ||
events | ||
xen-pciback | ||
xenbus | ||
xenfs | ||
acpi.c | ||
arm-device.c | ||
balloon.c | ||
biomerge.c | ||
cpu_hotplug.c | ||
dbgp.c | ||
efi.c | ||
evtchn.c | ||
features.c | ||
gntalloc.c | ||
gntdev-common.h | ||
gntdev-dmabuf.c | ||
gntdev-dmabuf.h | ||
gntdev.c | ||
grant-dma-iommu.c | ||
grant-dma-ops.c | ||
grant-table.c | ||
Kconfig | ||
Makefile | ||
manage.c | ||
mcelog.c | ||
mem-reservation.c | ||
pci.c | ||
pcpu.c | ||
platform-pci.c | ||
privcmd-buf.c | ||
privcmd.c | ||
privcmd.h | ||
pvcalls-back.c | ||
pvcalls-front.c | ||
pvcalls-front.h | ||
swiotlb-xen.c | ||
sys-hypervisor.c | ||
time.c | ||
unpopulated-alloc.c | ||
xen-acpi-pad.c | ||
xen-acpi-processor.c | ||
xen-balloon.c | ||
xen-front-pgdir-shbuf.c | ||
xen-scsiback.c | ||
xlate_mmu.c |