We want to be able to clear the contents of sme_early_buffer after __sme_early_enc_dec() because it is used to move encrypted and decrypted data, but since __sme_early_enc_dec() is __init we can simply free this buffer after init.
This saves a page that is otherwise unreferenced after init. Reported-by: Cfir Cohen <c...@google.com> Signed-off-by: David Rientjes <rient...@google.com> --- arch/x86/mm/mem_encrypt.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/mm/mem_encrypt.c b/arch/x86/mm/mem_encrypt.c --- a/arch/x86/mm/mem_encrypt.c +++ b/arch/x86/mm/mem_encrypt.c @@ -41,7 +41,7 @@ EXPORT_SYMBOL_GPL(sev_enable_key); bool sev_enabled __section(.data); /* Buffer used for early in-place encryption by BSP, no locking needed */ -static char sme_early_buffer[PAGE_SIZE] __aligned(PAGE_SIZE); +static char sme_early_buffer[PAGE_SIZE] __initdata __aligned(PAGE_SIZE); /* * This routine does not change the underlying encryption setting of the
