diff options
| author | Thomas Gleixner <tglx@linutronix.de> | 2017-08-28 08:47:41 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-08-29 12:07:25 +0200 |
| commit | 38e9e81f4c81c75799b002d5811de7241b307676 (patch) | |
| tree | 4af3080b5543221bf460a9f9c9ca266edf11c896 /arch/x86/math-emu | |
| parent | 9a98e7780022aa7cd201eb8a88a4f1d607b73cde (diff) | |
| download | linux-next-38e9e81f4c81c75799b002d5811de7241b307676.tar.gz | |
x86/gdt: Use bitfields for initialization
The GDT entry related code uses two ways to access entries via
union fields:
- bitfields
- macros which initialize the two 16-bit parts of the entry
by magic shift and mask operations.
Clean it up and only use the bitfields to initialize and access entries.
( The old access patterns were partly done due to GCC optimizing bitfield
accesses in a horrible way - that's mostly fixed these days and clarity
of code in such low level accessors is very important. )
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Link: http://lkml.kernel.org/r/20170828064958.197673367@linutronix.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'arch/x86/math-emu')
| -rw-r--r-- | arch/x86/math-emu/fpu_system.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/math-emu/fpu_system.h b/arch/x86/math-emu/fpu_system.h index 2319a257ec32..699f329f1d40 100644 --- a/arch/x86/math-emu/fpu_system.h +++ b/arch/x86/math-emu/fpu_system.h @@ -49,7 +49,7 @@ static inline unsigned long seg_get_base(struct desc_struct *d) static inline unsigned long seg_get_limit(struct desc_struct *d) { - return ((unsigned long)d->limit << 16) | d->limit0; + return ((unsigned long)d->limit1 << 16) | d->limit0; } static inline unsigned long seg_get_granularity(struct desc_struct *d) |