• Thomas Gleixner's avatar
    x86/gdt: Use bitfields for initialization · 38e9e81f
    Thomas Gleixner authored
    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: default avatarThomas 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.deSigned-off-by: default avatarIngo Molnar <mingo@kernel.org>
    38e9e81f
fpu_system.h 4.25 KB