diff options
Diffstat (limited to 'arch/x86/kernel/fpu')
| -rw-r--r-- | arch/x86/kernel/fpu/xstate.c | 44 |
1 files changed, 22 insertions, 22 deletions
diff --git a/arch/x86/kernel/fpu/xstate.c b/arch/x86/kernel/fpu/xstate.c index 1f50fdaf4c5a..c13083579655 100644 --- a/arch/x86/kernel/fpu/xstate.c +++ b/arch/x86/kernel/fpu/xstate.c @@ -927,15 +927,15 @@ int arch_set_user_pkey_access(struct task_struct *tsk, int pkey, static inline int __copy_xstate_to_kernel(void *kbuf, const void *data, - unsigned int pos, unsigned int count, int end_pos) + unsigned int offset, unsigned int size, int size_total) { - if (!count) + if (!size) return 0; - if (end_pos < 0 || pos < end_pos) { - unsigned int copy = end_pos < 0 ? count : min(count, end_pos - pos); + if (size_total < 0 || offset < size_total) { + unsigned int copy = size_total < 0 ? size : min(size, size_total - offset); - memcpy(kbuf + pos, data, copy); + memcpy(kbuf + offset, data, copy); } return 0; } @@ -947,7 +947,7 @@ __copy_xstate_to_kernel(void *kbuf, * It supports partial copy but pos always starts from zero. This is called * from xstateregs_get() and there we check the CPU has XSAVES. */ -int copy_xstate_to_kernel(void *kbuf, struct xregs_state *xsave, unsigned int pos, unsigned int count) +int copy_xstate_to_kernel(void *kbuf, struct xregs_state *xsave, unsigned int offset_start, unsigned int size_total) { unsigned int offset, size; int ret, i; @@ -956,7 +956,7 @@ int copy_xstate_to_kernel(void *kbuf, struct xregs_state *xsave, unsigned int po /* * Currently copy_regset_to_user() starts from pos 0: */ - if (unlikely(pos != 0)) + if (unlikely(offset_start != 0)) return -EFAULT; /* @@ -972,7 +972,7 @@ int copy_xstate_to_kernel(void *kbuf, struct xregs_state *xsave, unsigned int po offset = offsetof(struct xregs_state, header); size = sizeof(header); - ret = __copy_xstate_to_kernel(kbuf, &header, offset, size, count); + ret = __copy_xstate_to_kernel(kbuf, &header, offset, size, size_total); if (ret) return ret; @@ -986,11 +986,11 @@ int copy_xstate_to_kernel(void *kbuf, struct xregs_state *xsave, unsigned int po offset = xstate_offsets[i]; size = xstate_sizes[i]; - ret = __copy_xstate_to_kernel(kbuf, src, offset, size, count); + ret = __copy_xstate_to_kernel(kbuf, src, offset, size, size_total); if (ret) return ret; - if (offset + size >= count) + if (offset + size >= size_total) break; } @@ -1002,7 +1002,7 @@ int copy_xstate_to_kernel(void *kbuf, struct xregs_state *xsave, unsigned int po offset = offsetof(struct fxregs_state, sw_reserved); size = sizeof(xstate_fx_sw_bytes); - ret = __copy_xstate_to_kernel(kbuf, xstate_fx_sw_bytes, offset, size, count); + ret = __copy_xstate_to_kernel(kbuf, xstate_fx_sw_bytes, offset, size, size_total); if (ret) return ret; @@ -1010,15 +1010,15 @@ int copy_xstate_to_kernel(void *kbuf, struct xregs_state *xsave, unsigned int po } static inline int -__copy_xstate_to_user(void __user *ubuf, const void *data, unsigned int pos, unsigned int count, int end_pos) +__copy_xstate_to_user(void __user *ubuf, const void *data, unsigned int offset, unsigned int size, int size_total) { - if (!count) + if (!size) return 0; - if (end_pos < 0 || pos < end_pos) { - unsigned int copy = end_pos < 0 ? count : min(count, end_pos - pos); + if (size_total < 0 || offset < size_total) { + unsigned int copy = size_total < 0 ? size : min(size, size_total - offset); - if (__copy_to_user(ubuf + pos, data, copy)) + if (__copy_to_user(ubuf + offset, data, copy)) return -EFAULT; } return 0; @@ -1030,7 +1030,7 @@ __copy_xstate_to_user(void __user *ubuf, const void *data, unsigned int pos, uns * zero. This is called from xstateregs_get() and there we check the CPU * has XSAVES. */ -int copy_xstate_to_user(void __user *ubuf, struct xregs_state *xsave, unsigned int pos, unsigned int count) +int copy_xstate_to_user(void __user *ubuf, struct xregs_state *xsave, unsigned int offset_start, unsigned int size_total) { unsigned int offset, size; int ret, i; @@ -1039,7 +1039,7 @@ int copy_xstate_to_user(void __user *ubuf, struct xregs_state *xsave, unsigned i /* * Currently copy_regset_to_user() starts from pos 0: */ - if (unlikely(pos != 0)) + if (unlikely(offset_start != 0)) return -EFAULT; /* @@ -1055,7 +1055,7 @@ int copy_xstate_to_user(void __user *ubuf, struct xregs_state *xsave, unsigned i offset = offsetof(struct xregs_state, header); size = sizeof(header); - ret = __copy_xstate_to_user(ubuf, &header, offset, size, count); + ret = __copy_xstate_to_user(ubuf, &header, offset, size, size_total); if (ret) return ret; @@ -1069,11 +1069,11 @@ int copy_xstate_to_user(void __user *ubuf, struct xregs_state *xsave, unsigned i offset = xstate_offsets[i]; size = xstate_sizes[i]; - ret = __copy_xstate_to_user(ubuf, src, offset, size, count); + ret = __copy_xstate_to_user(ubuf, src, offset, size, size_total); if (ret) return ret; - if (offset + size >= count) + if (offset + size >= size_total) break; } @@ -1085,7 +1085,7 @@ int copy_xstate_to_user(void __user *ubuf, struct xregs_state *xsave, unsigned i offset = offsetof(struct fxregs_state, sw_reserved); size = sizeof(xstate_fx_sw_bytes); - ret = __copy_xstate_to_user(ubuf, xstate_fx_sw_bytes, offset, size, count); + ret = __copy_xstate_to_user(ubuf, xstate_fx_sw_bytes, offset, size, size_total); if (ret) return ret; |
