diff options
| author | Jan Beulich <jbeulich@suse.com> | 2019-12-16 11:40:03 +0100 |
|---|---|---|
| committer | Borislav Petkov <bp@suse.de> | 2020-01-09 12:33:43 +0100 |
| commit | b2b1d94cdfd4e906d3936dab2850096a4a0c2017 (patch) | |
| tree | 74dae622576b969ddb8b1805738e4b65241eec15 /arch/x86/entry | |
| parent | x86: Remove force_iret() (diff) | |
| download | linux-b2b1d94cdfd4e906d3936dab2850096a4a0c2017.tar.xz linux-b2b1d94cdfd4e906d3936dab2850096a4a0c2017.zip | |
x86/entry/64: Add instruction suffix to SYSRET
ignore_sysret() contains an unsuffixed SYSRET instruction. gas correctly
interprets this as SYSRETL, but leaving it up to gas to guess when there
is no register operand that implies a size is bad practice, and upstream
gas is likely to warn about this in the future. Use SYSRETL explicitly.
This does not change the assembled output.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Signed-off-by: Borislav Petkov <bp@suse.de>
Acked-by: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/038a7c35-062b-a285-c6d2-653b56585844@suse.com
Diffstat (limited to 'arch/x86/entry')
| -rw-r--r-- | arch/x86/entry/entry_64.S | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/entry/entry_64.S b/arch/x86/entry/entry_64.S index 76942cbd95a1..f2bb91e87877 100644 --- a/arch/x86/entry/entry_64.S +++ b/arch/x86/entry/entry_64.S @@ -1728,7 +1728,7 @@ SYM_CODE_END(nmi) SYM_CODE_START(ignore_sysret) UNWIND_HINT_EMPTY mov $-ENOSYS, %eax - sysret + sysretl SYM_CODE_END(ignore_sysret) #endif |