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virt: sev-guest: Mark driver struct with __refdata to prevent section mismatch

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[ Upstream commit 3991b04d4870fd334b77b859a8642ca7fb592603 ]

As described in the added code comment, a reference to .exit.text is ok for
drivers registered via module_platform_driver_probe(). Make this explicit to
prevent the following section mismatch warning:

  WARNING: modpost: drivers/virt/coco/sev-guest/sev-guest: section mismatch in reference: \
    sev_guest_driver+0x10 (section: .data) -> sev_guest_remove (section: .exit.text)

that triggers on an allmodconfig W=1 build.

Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: Borislav Petkov (AMD) <bp@alien8.de>
Reviewed-by: Kuppuswamy Sathyanarayanan <sathyanarayanan.kuppuswamy@linux.intel.com>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Link: https://lore.kernel.org/r/4a81b0e87728a58904283e2d1f18f73abc69c2a1.1711748999.git.u.kleine-koenig@pengutronix.de
Signed-off-by: Sasha Levin <sashal@kernel.org>
This commit is contained in:
Uwe Kleine-König 2024-03-29 22:54:41 +01:00 committed by Greg Kroah-Hartman
parent 941358a2c5
commit 2768720348
1 changed files with 6 additions and 1 deletions
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7
drivers/virt/coco/sev-guest/sev-guest.c
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@ -1009,8 +1009,13 @@ static void __exit sev_guest_remove(struct platform_device *pdev)
* This driver is meant to be a common SEV guest interface driver and to
* support any SEV guest API. As such, even though it has been introduced
* with the SEV-SNP support, it is named "sev-guest".
*
* sev_guest_remove() lives in .exit.text. For drivers registered via
* module_platform_driver_probe() this is ok because they cannot get unbound
* at runtime. So mark the driver struct with __refdata to prevent modpost
* triggering a section mismatch warning.
*/
static struct platform_driver sev_guest_driver = {
static struct platform_driver sev_guest_driver __refdata = {
.remove_new = __exit_p(sev_guest_remove),
.driver = {
.name = "sev-guest",