WARNING: line length of 92 exceeds 80 columns
#55: FILE: arch/x86/kernel/uprobes.c:428:
+static int tramp_mremap(const struct vm_special_mapping *sm, struct vm_area_struct *new_vma)

WARNING: line length of 89 exceeds 80 columns
#72: FILE: arch/x86/kernel/uprobes.c:445:
+	err = copy_from_user(&bp_vaddr, (void __user *)regs->sp + 3*8, sizeof(bp_vaddr));

CHECK: spaces preferred around that '*' (ctx:VxV)
#72: FILE: arch/x86/kernel/uprobes.c:445:
+	err = copy_from_user(&bp_vaddr, (void __user *)regs->sp + 3*8, sizeof(bp_vaddr));
 	                                                           ^

CHECK: No space is necessary after a cast
#80: FILE: arch/x86/kernel/uprobes.c:453:
+	if (!vma || vma->vm_private_data != (void *) &tramp_mapping) {

CHECK: Lines should not end with a '('
#89: FILE: arch/x86/kernel/uprobes.c:462:
+asm (

WARNING: externs should be avoided in .c files
#108: FILE: arch/x86/kernel/uprobes.c:481:
+extern __visible u8 uprobe_trampoline_entry[];

WARNING: externs should be avoided in .c files
#109: FILE: arch/x86/kernel/uprobes.c:482:
+extern __visible u8 uprobe_trampoline_end[];

CHECK: No space is necessary after a cast
#128: FILE: arch/x86/kernel/uprobes.c:501:
+	tramp_mapping.pages = (struct page **) &pages;

CHECK: extern prototypes should be avoided in .h files
#159: FILE: include/linux/uprobes.h:235:
+extern void handle_syscall_uprobe(struct pt_regs *regs, unsigned long bp_vaddr);

WARNING: use of RCU tasks trace is incorrect outside BPF or core RCU code
#176: FILE: kernel/events/uprobes.c:2737:
+	rcu_read_lock_trace();

WARNING: use of RCU tasks trace is incorrect outside BPF or core RCU code
#190: FILE: kernel/events/uprobes.c:2751:
+	rcu_read_unlock_trace();

total: 0 errors, 6 warnings, 5 checks, 140 lines checked

NOTE: For some of the reported defects, checkpatch may be able to
      mechanically convert to the typical style using --fix or --fix-inplace.

Commit 9e09006880d9 ("uprobes/x86: Add uprobe syscall to speed up uprobe") has style problems, please review.

NOTE: Ignored message types: ALLOC_SIZEOF_STRUCT BAD_REPORTED_BY_LINK CAMELCASE COMMIT_LOG_LONG_LINE GIT_COMMIT_ID MACRO_ARG_REUSE NO_AUTHOR_SIGN_OFF

NOTE: If any of the errors are false positives, please report
      them to the maintainer, see CHECKPATCH in MAINTAINERS.
total: 0 errors, 6 warnings, 5 checks, 140 lines checked