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- !CONFIG_SMP build fix

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- pte bit testing macros conversion fix (int truncates top bits of long)
 - stack unwinding PC calculation fix
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Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux

Pull ARM64 fixes from Catalin Marinas:
 - !CONFIG_SMP build fix
 - pte bit testing macros conversion fix (int truncates top bits of
   long)
 - stack unwinding PC calculation fix

* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
  arm64: Fix !CONFIG_SMP kernel build
  arm64: mm: Add double logical invert to pte accessors
  ARM64: unwind: Fix PC calculation
This commit is contained in:
Linus Torvalds 2014-02-28 11:43:42 -08:00
commit 78d9e93440
3 changed files with 18 additions and 6 deletions
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8
arch/arm64/include/asm/percpu.h
View File

@ -16,6 +16,8 @@
#ifndef __ASM_PERCPU_H #ifndef __ASM_PERCPU_H
#define __ASM_PERCPU_H #define __ASM_PERCPU_H
#ifdef CONFIG_SMP
static inline void set_my_cpu_offset(unsigned long off) static inline void set_my_cpu_offset(unsigned long off)
{ {
asm volatile("msr tpidr_el1, %0" :: "r" (off) : "memory"); asm volatile("msr tpidr_el1, %0" :: "r" (off) : "memory");
@ -36,6 +38,12 @@ static inline unsigned long __my_cpu_offset(void)
} }
#define __my_cpu_offset __my_cpu_offset() #define __my_cpu_offset __my_cpu_offset()
#else /* !CONFIG_SMP */
#define set_my_cpu_offset(x) do { } while (0)
#endif /* CONFIG_SMP */
#include <asm-generic/percpu.h> #include <asm-generic/percpu.h>
#endif /* __ASM_PERCPU_H */ #endif /* __ASM_PERCPU_H */

10
arch/arm64/include/asm/pgtable.h
View File

@ -136,11 +136,11 @@ extern struct page *empty_zero_page;
/* /*
* The following only work if pte_present(). Undefined behaviour otherwise. * The following only work if pte_present(). Undefined behaviour otherwise.
*/ */
#define pte_present(pte) (pte_val(pte) & (PTE_VALID | PTE_PROT_NONE)) #define pte_present(pte) (!!(pte_val(pte) & (PTE_VALID | PTE_PROT_NONE)))
#define pte_dirty(pte) (pte_val(pte) & PTE_DIRTY) #define pte_dirty(pte) (!!(pte_val(pte) & PTE_DIRTY))
#define pte_young(pte) (pte_val(pte) & PTE_AF) #define pte_young(pte) (!!(pte_val(pte) & PTE_AF))
#define pte_special(pte) (pte_val(pte) & PTE_SPECIAL) #define pte_special(pte) (!!(pte_val(pte) & PTE_SPECIAL))
#define pte_write(pte) (pte_val(pte) & PTE_WRITE) #define pte_write(pte) (!!(pte_val(pte) & PTE_WRITE))
#define pte_exec(pte) (!(pte_val(pte) & PTE_UXN)) #define pte_exec(pte) (!(pte_val(pte) & PTE_UXN))
#define pte_valid_user(pte) \ #define pte_valid_user(pte) \

6
arch/arm64/kernel/stacktrace.c
View File

@ -48,7 +48,11 @@ int unwind_frame(struct stackframe *frame)
frame->sp = fp + 0x10; frame->sp = fp + 0x10;
frame->fp = *(unsigned long *)(fp); frame->fp = *(unsigned long *)(fp);
frame->pc = *(unsigned long *)(fp + 8); /*
* -4 here because we care about the PC at time of bl,
* not where the return will go.
*/
frame->pc = *(unsigned long *)(fp + 8) - 4;
return 0; return 0;
} }