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authorThomas Gleixner <tglx@linutronix.de>2017-08-28 08:47:41 +0200
committerIngo Molnar <mingo@kernel.org>2017-08-29 12:07:25 +0200
commit38e9e81f4c81c75799b002d5811de7241b307676 (patch)
tree4af3080b5543221bf460a9f9c9ca266edf11c896 /arch/x86/math-emu
parent9a98e7780022aa7cd201eb8a88a4f1d607b73cde (diff)
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.h2
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)