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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-02 08:07:51 +0300 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-05-02 08:07:51 +0300 |
| commit | 3fb9268e43e7ab62adb5c6ddec58d3cb4767bd9a (patch) | |
| tree | 026267c8bfa27b5cf73954c36148827a0ac49286 /arch/x86/lib/clear_page_64.S | |
| parent | 12ca7c8db30d36e0ba1d00d17fc8c85f9ebfdf47 (diff) | |
| parent | 262fa734a0023a43391f9bd4a4099487b8393f35 (diff) | |
| download | linux-3fb9268e43e7ab62adb5c6ddec58d3cb4767bd9a.tar.xz | |
Merge branch 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip
Pull x86 asm updates from Ingo Molnar:
"The main changes in this cycle were:
- unwinder fixes and enhancements
- improve ftrace interaction with the unwinder
- optimize the code footprint of WARN() and related debugging
constructs
- ... plus misc updates, cleanups and fixes"
* 'x86-asm-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: (24 commits)
x86/unwind: Dump all stacks in unwind_dump()
x86/unwind: Silence more entry-code related warnings
x86/ftrace: Fix ebp in ftrace_regs_caller that screws up unwinder
x86/unwind: Remove unused 'sp' parameter in unwind_dump()
x86/unwind: Prepend hex mask value with '0x' in unwind_dump()
x86/unwind: Properly zero-pad 32-bit values in unwind_dump()
x86/unwind: Ensure stack pointer is aligned
debug: Avoid setting BUGFLAG_WARNING twice
x86/unwind: Silence entry-related warnings
x86/unwind: Read stack return address in update_stack_state()
x86/unwind: Move common code into update_stack_state()
debug: Fix __bug_table[] in arch linker scripts
debug: Add _ONCE() logic to report_bug()
x86/debug: Define BUG() again for !CONFIG_BUG
x86/debug: Implement __WARN() using UD0
x86/ftrace: Use Makefile logic instead of #ifdef for compiling ftrace_*.o
x86/ftrace: Add -mfentry support to x86_32 with DYNAMIC_FTRACE set
x86/ftrace: Clean up ftrace_regs_caller
x86/ftrace: Add stack frame pointer to ftrace_caller
x86/ftrace: Move the ftrace specific code out of entry_32.S
...
Diffstat (limited to 'arch/x86/lib/clear_page_64.S')
| -rw-r--r-- | arch/x86/lib/clear_page_64.S | 17 |
1 files changed, 7 insertions, 10 deletions
diff --git a/arch/x86/lib/clear_page_64.S b/arch/x86/lib/clear_page_64.S index 5e2af3a88cf5..81b1635d67de 100644 --- a/arch/x86/lib/clear_page_64.S +++ b/arch/x86/lib/clear_page_64.S @@ -14,20 +14,15 @@ * Zero a page. * %rdi - page */ -ENTRY(clear_page) - - ALTERNATIVE_2 "jmp clear_page_orig", "", X86_FEATURE_REP_GOOD, \ - "jmp clear_page_c_e", X86_FEATURE_ERMS - +ENTRY(clear_page_rep) movl $4096/8,%ecx xorl %eax,%eax rep stosq ret -ENDPROC(clear_page) -EXPORT_SYMBOL(clear_page) +ENDPROC(clear_page_rep) +EXPORT_SYMBOL_GPL(clear_page_rep) ENTRY(clear_page_orig) - xorl %eax,%eax movl $4096/64,%ecx .p2align 4 @@ -47,10 +42,12 @@ ENTRY(clear_page_orig) nop ret ENDPROC(clear_page_orig) +EXPORT_SYMBOL_GPL(clear_page_orig) -ENTRY(clear_page_c_e) +ENTRY(clear_page_erms) movl $4096,%ecx xorl %eax,%eax rep stosb ret -ENDPROC(clear_page_c_e) +ENDPROC(clear_page_erms) +EXPORT_SYMBOL_GPL(clear_page_erms) |