diff options
Diffstat (limited to 'arch/arm64')
| -rw-r--r-- | arch/arm64/include/asm/dma-mapping.h | 2 | ||||
| -rw-r--r-- | arch/arm64/kernel/ptrace.c | 32 | ||||
| -rw-r--r-- | arch/arm64/mm/hugetlbpage.c | 5 |
3 files changed, 23 insertions, 16 deletions
diff --git a/arch/arm64/include/asm/dma-mapping.h b/arch/arm64/include/asm/dma-mapping.h index 3a4572ec3273..dc82e52acdb3 100644 --- a/arch/arm64/include/asm/dma-mapping.h +++ b/arch/arm64/include/asm/dma-mapping.h @@ -26,8 +26,6 @@ #include <xen/xen.h> #include <asm/xen/hypervisor.h> -#define ARCH_HAS_DMA_GET_REQUIRED_MASK - #define DMA_ERROR_CODE (~(dma_addr_t)0) extern struct dma_map_ops *dma_ops; extern struct dma_map_ops coherent_swiotlb_dma_ops; diff --git a/arch/arm64/kernel/ptrace.c b/arch/arm64/kernel/ptrace.c index 0bf195533088..7c8e809bdbde 100644 --- a/arch/arm64/kernel/ptrace.c +++ b/arch/arm64/kernel/ptrace.c @@ -654,11 +654,16 @@ static int compat_gpr_get(struct task_struct *target, reg = task_pt_regs(target)->regs[idx]; } - ret = copy_to_user(ubuf, ®, sizeof(reg)); - if (ret) - break; - - ubuf += sizeof(reg); + if (kbuf) { + memcpy(kbuf, ®, sizeof(reg)); + kbuf += sizeof(reg); + } else { + ret = copy_to_user(ubuf, ®, sizeof(reg)); + if (ret) + break; + + ubuf += sizeof(reg); + } } return ret; @@ -688,11 +693,16 @@ static int compat_gpr_set(struct task_struct *target, unsigned int idx = start + i; compat_ulong_t reg; - ret = copy_from_user(®, ubuf, sizeof(reg)); - if (ret) - return ret; + if (kbuf) { + memcpy(®, kbuf, sizeof(reg)); + kbuf += sizeof(reg); + } else { + ret = copy_from_user(®, ubuf, sizeof(reg)); + if (ret) + return ret; - ubuf += sizeof(reg); + ubuf += sizeof(reg); + } switch (idx) { case 15: @@ -825,6 +835,7 @@ static int compat_ptrace_write_user(struct task_struct *tsk, compat_ulong_t off, compat_ulong_t val) { int ret; + mm_segment_t old_fs = get_fs(); if (off & 3 || off >= COMPAT_USER_SZ) return -EIO; @@ -832,10 +843,13 @@ static int compat_ptrace_write_user(struct task_struct *tsk, compat_ulong_t off, if (off >= sizeof(compat_elf_gregset_t)) return 0; + set_fs(KERNEL_DS); ret = copy_regset_from_user(tsk, &user_aarch32_view, REGSET_COMPAT_GPR, off, sizeof(compat_ulong_t), &val); + set_fs(old_fs); + return ret; } diff --git a/arch/arm64/mm/hugetlbpage.c b/arch/arm64/mm/hugetlbpage.c index 31eb959e9aa8..023747bf4dd7 100644 --- a/arch/arm64/mm/hugetlbpage.c +++ b/arch/arm64/mm/hugetlbpage.c @@ -58,11 +58,6 @@ int pud_huge(pud_t pud) #endif } -int pmd_huge_support(void) -{ - return 1; -} - static __init int setup_hugepagesz(char *opt) { unsigned long ps = memparse(opt, &opt); |