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| author | Andy Lutomirski <luto@kernel.org> | 2017-11-02 10:59:17 +0300 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-11-02 13:04:49 +0300 |
| commit | 3383642c2f9d4f5b4fa37436db4a109a1a10018c (patch) | |
| tree | 8da86c9ac666a7595f0aeb0e1d18f0934a40dc3d /arch/x86/include | |
| parent | d375cf1530595e33961a8844192cddab913650e3 (diff) | |
| download | linux-3383642c2f9d4f5b4fa37436db4a109a1a10018c.tar.xz | |
x86/traps: Use a new on_thread_stack() helper to clean up an assertion
Let's keep the stack-related logic together rather than open-coding
a comparison in an assertion in the traps code.
Signed-off-by: Andy Lutomirski <luto@kernel.org>
Reviewed-by: Borislav Petkov <bp@suse.de>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/856b15bee1f55017b8f79d3758b0d51c48a08cf8.1509609304.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/include')
| -rw-r--r-- | arch/x86/include/asm/processor.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/x86/include/asm/processor.h b/arch/x86/include/asm/processor.h index ae2ae6d80674..f10dae14f951 100644 --- a/arch/x86/include/asm/processor.h +++ b/arch/x86/include/asm/processor.h @@ -541,6 +541,12 @@ static inline unsigned long current_top_of_stack(void) #endif } +static inline bool on_thread_stack(void) +{ + return (unsigned long)(current_top_of_stack() - + current_stack_pointer) < THREAD_SIZE; +} + #ifdef CONFIG_PARAVIRT #include <asm/paravirt.h> #else |