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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-13 13:36:07 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2020-10-13 13:36:07 -0700 |
| commit | 029f56db6ac248769f2c260bfaf3c3c0e23e904c (patch) | |
| tree | 78c03b03258c0ac5d7b9546acc2ba14e87e277fd /arch/x86/boot | |
| parent | 7cd4ecd9177b94af783b8e21de7c65b41a871342 (diff) | |
| parent | aa5cacdc29d76a005cbbee018a47faa6e724dd2d (diff) | |
Merge tag 'x86_asm_for_v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 asm updates from Borislav Petkov:
"Two asm wrapper fixes:
- Use XORL instead of XORQ to avoid a REX prefix and save some bytes
in the .fixup section, by Uros Bizjak.
- Replace __force_order dummy variable with a memory clobber to fix
LLVM requiring a definition for former and to prevent memory
accesses from still being cached/reordered, by Arvind Sankar"
* tag 'x86_asm_for_v5.10' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
x86/asm: Replace __force_order with a memory clobber
x86/uaccess: Use XORL %0,%0 in __get_user_asm()
Diffstat (limited to 'arch/x86/boot')
| -rw-r--r-- | arch/x86/boot/compressed/pgtable_64.c | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/arch/x86/boot/compressed/pgtable_64.c b/arch/x86/boot/compressed/pgtable_64.c index c8862696a47b..7d0394f4ebf9 100644 --- a/arch/x86/boot/compressed/pgtable_64.c +++ b/arch/x86/boot/compressed/pgtable_64.c @@ -5,15 +5,6 @@ #include "pgtable.h" #include "../string.h" -/* - * __force_order is used by special_insns.h asm code to force instruction - * serialization. - * - * It is not referenced from the code, but GCC < 5 with -fPIE would fail - * due to an undefined symbol. Define it to make these ancient GCCs work. - */ -unsigned long __force_order; - #define BIOS_START_MIN 0x20000U /* 128K, less than this is insane */ #define BIOS_START_MAX 0x9f000U /* 640K, absolute maximum */ |