+ efivars-use-in_compat_syscall-to-check-for-compat-callers.patch added to -mm tree

+ efivars-use-in_compat_syscall-to-check-for-compat-callers.patch added to -mm tree

[akpm]

The patch titled
     Subject: drivers/firmware/efi/efivars.c: use in_compat_syscall() to check for compat callers
has been added to the -mm tree.  Its filename is
     efivars-use-in_compat_syscall-to-check-for-compat-callers.patch

This patch should soon appear at
    http://ozlabs.org/~akpm/mmots/broken-out/efivars-use-in_compat_syscall-to-check-for-compat-callers.patch
and later at
    http://ozlabs.org/~akpm/mmotm/broken-out/efivars-use-in_compat_syscall-to-check-for-compat-callers.patch

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------------------------------------------------------
From: Andy Lutomirski <luto@kernel.org>
Subject: drivers/firmware/efi/efivars.c: use in_compat_syscall() to check for compat callers

This should make no difference on any architecture, as x86's historical
is_compat_task behavior really did check whether the calling syscall was a
compat syscall.  x86's is_compat_task is going away, though.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Matt Fleming <matt@codeblueprint.co.uk>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 drivers/firmware/efi/efivars.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff -puN drivers/firmware/efi/efivars.c~efivars-use-in_compat_syscall-to-check-for-compat-callers drivers/firmware/efi/efivars.c
--- a/drivers/firmware/efi/efivars.c~efivars-use-in_compat_syscall-to-check-for-compat-callers
+++ a/drivers/firmware/efi/efivars.c
@@ -231,7 +231,7 @@ sanity_check(struct efi_variable *var, e
 
 static inline bool is_compat(void)
 {
-	if (IS_ENABLED(CONFIG_COMPAT) && is_compat_task())
+	if (IS_ENABLED(CONFIG_COMPAT) && in_compat_syscall())
 		return true;
 
 	return false;
_

Patches currently in -mm which might be from luto@kernel.org are

compat-add-in_compat_syscall-to-ask-whether-were-in-a-compat-syscall.patch
sparc-compat-provide-an-accurate-in_compat_syscall-implementation.patch
sparc-syscall-fix-syscall_get_arch.patch
seccomp-check-in_compat_syscall-not-is_compat_task-in-strict-mode.patch
ptrace-in-peek_siginfo-check-syscall-bitness-not-task-bitness.patch
auditsc-for-seccomp-events-log-syscall-compat-state-using-in_compat_syscall.patch
staging-lustre-switch-from-is_compat_task-to-in_compat_syscall.patch
ext4-in-ext4_dir_llseek-check-syscall-bitness-directly.patch
net-sctp-use-in_compat_syscall-for-sctp_getsockopt_connectx3.patch
net-xfrm_user-use-in_compat_syscall-to-deny-compat-syscalls.patch
firewire-use-in_compat_syscall-to-check-ioctl-compatness.patch
efivars-use-in_compat_syscall-to-check-for-compat-callers.patch
amdkfd-use-in_compat_syscall-to-check-open-caller-type.patch
input-redefine-input_compat_test-as-in_compat_syscall.patch
uhid-check-write-bitness-using-in_compat_syscall.patch
x86-compat-remove-is_compat_task.patch