x86/irq: Get rid of the 'first_system_vector' indirection bogosity
This variable is beyond pointless. Nothing allocates a vector via alloc_gate() below FIRST_SYSTEM_VECTOR. So nothing can change first_system_vector. If there is a need for a gate below FIRST_SYSTEM_VECTOR then it can be added to the vector defines and FIRST_SYSTEM_VECTOR can be adjusted accordingly. Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andy Lutomirski <luto@kernel.org> Cc: Borislav Petkov <bp@alien8.de> 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/20170828064956.357109735@linutronix.de Signed-off-by: Ingo Molnar <mingo@kernel.org>
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committed by
Ingo Molnar

parent
fa4ab5774d
commit
05161b9cbe
@@ -5,6 +5,7 @@
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#include <asm/ldt.h>
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#include <asm/mmu.h>
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#include <asm/fixmap.h>
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#include <asm/irq_vectors.h>
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#include <linux/smp.h>
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#include <linux/percpu.h>
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@@ -482,16 +483,14 @@ static inline void _set_gate(int gate, unsigned type, void *addr,
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0, 0, __KERNEL_CS); \
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} while (0)
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extern int first_system_vector;
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/* used_vectors is BITMAP for irq is not managed by percpu vector_irq */
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extern unsigned long used_vectors[];
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static inline void alloc_system_vector(int vector)
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{
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BUG_ON(vector < FIRST_SYSTEM_VECTOR);
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if (!test_bit(vector, used_vectors)) {
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set_bit(vector, used_vectors);
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if (first_system_vector > vector)
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first_system_vector = vector;
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} else {
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BUG();
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}
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