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Date: Wed, 26 Aug 2020 00:07:19 +0800 From: "Lee, Chun-Yi" <joeyli.kernel@...il.com> To: Ard Biesheuvel <ard.biesheuvel@...aro.org> Cc: linux-efi@...r.kernel.org, linux-kernel@...r.kernel.org, "Lee, Chun-Yi" <jlee@...e.com>, Matthias Brugger <mbrugger@...e.com>, Fabian Vogt <fvogt@...e.com>, Ilias Apalodimas <ilias.apalodimas@...aro.org>, Ard Biesheuvel <ardb@...nel.org> Subject: [PATCH v2] efi/efivars: Create efivars mount point via efivars abstraction This patch creates efivars mount point when active efivars abstraction be set. It is useful for userland to determine the availability of efivars filesystem. v2: Using efivars_kobject() helper instead of checking GetVariable or GetNextVariable EFI runtime services. Because the efivarfs code could be instantiated using a different efivars abstraction. Cc: Matthias Brugger <mbrugger@...e.com> Cc: Fabian Vogt <fvogt@...e.com> Cc: Ilias Apalodimas <ilias.apalodimas@...aro.org> Cc: Ard Biesheuvel <ardb@...nel.org> Signed-off-by: "Lee, Chun-Yi" <jlee@...e.com> --- drivers/firmware/efi/efi.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/drivers/firmware/efi/efi.c b/drivers/firmware/efi/efi.c index 3aa07c3b5136..db483fc68501 100644 --- a/drivers/firmware/efi/efi.c +++ b/drivers/firmware/efi/efi.c @@ -405,11 +405,13 @@ static int __init efisubsys_init(void) if (error) goto err_remove_group; - /* and the standard mountpoint for efivarfs */ - error = sysfs_create_mount_point(efi_kobj, "efivars"); - if (error) { - pr_err("efivars: Subsystem registration failed.\n"); - goto err_remove_group; + if (efivars_kobject()) { + /* and the standard mountpoint for efivarfs */ + error = sysfs_create_mount_point(efi_kobj, "efivars"); + if (error) { + pr_err("efivars: Subsystem registration failed.\n"); + goto err_remove_group; + } } if (efi_enabled(EFI_DBG) && efi_enabled(EFI_PRESERVE_BS_REGIONS)) -- 2.16.4
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