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| author |   Linus Torvalds <torvalds@linux-foundation.org> | 2017-01-06 15:18:58 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-01-06 15:18:58 -0800 |
| commit | b1ee51702e12a99d35d7c11d1d2b5cd324001ee2 (patch) | |
| tree | e7ad1ca152f914fccf09c65fb558779e57ed20a3 | |
| parent | Merge tag 'vfio-v4.10-rc3' of git://github.com/awilliam/linux-vfio (diff) | |
| parent | arm64: restore get_current() optimisation (diff) | |
| download | linux-dev-b1ee51702e12a99d35d7c11d1d2b5cd324001ee2.tar.xz linux-dev-b1ee51702e12a99d35d7c11d1d2b5cd324001ee2.zip | |
Merge tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux
Pull arm64 fixes from Catalin Marinas:
- re-introduce the arm64 get_current() optimisation
- KERN_CONT fallout fix in show_pte()
* tag 'arm64-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux:
arm64: restore get_current() optimisation
arm64: mm: fix show_pte KERN_CONT fallout
| -rw-r--r-- | arch/arm64/include/asm/current.h | 10 | ||||
| -rw-r--r-- | arch/arm64/mm/fault.c | 8 |
2 files changed, 13 insertions, 5 deletions
diff --git a/arch/arm64/include/asm/current.h b/arch/arm64/include/asm/current.h index f2bcbe2d9889..86c404171305 100644 --- a/arch/arm64/include/asm/current.h +++ b/arch/arm64/include/asm/current.h @@ -9,9 +9,17 @@ struct task_struct; +/* + * We don't use read_sysreg() as we want the compiler to cache the value where + * possible. + */ static __always_inline struct task_struct *get_current(void) { - return (struct task_struct *)read_sysreg(sp_el0); + unsigned long sp_el0; + + asm ("mrs %0, sp_el0" : "=r" (sp_el0)); + + return (struct task_struct *)sp_el0; } #define current get_current() diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c index a78a5c401806..156169c6981b 100644 --- a/arch/arm64/mm/fault.c +++ b/arch/arm64/mm/fault.c @@ -88,21 +88,21 @@ void show_pte(struct mm_struct *mm, unsigned long addr) break; pud = pud_offset(pgd, addr); - printk(", *pud=%016llx", pud_val(*pud)); + pr_cont(", *pud=%016llx", pud_val(*pud)); if (pud_none(*pud) || pud_bad(*pud)) break; pmd = pmd_offset(pud, addr); - printk(", *pmd=%016llx", pmd_val(*pmd)); + pr_cont(", *pmd=%016llx", pmd_val(*pmd)); if (pmd_none(*pmd) || pmd_bad(*pmd)) break; pte = pte_offset_map(pmd, addr); - printk(", *pte=%016llx", pte_val(*pte)); + pr_cont(", *pte=%016llx", pte_val(*pte)); pte_unmap(pte); } while(0); - printk("\n"); + pr_cont("\n"); } #ifdef CONFIG_ARM64_HW_AFDBM |