WARNING: Possible repeated word: 'for'
#6: 
Adding support to add special mapping for for user space trampoline

CHECK: extern prototypes should be avoided in .h files
#63: FILE: include/linux/uprobes.h:231:
+extern struct uprobe_trampoline *uprobe_trampoline_get(unsigned long vaddr);

CHECK: extern prototypes should be avoided in .h files
#64: FILE: include/linux/uprobes.h:232:
+extern void uprobe_trampoline_put(struct uprobe_trampoline *area);

CHECK: extern prototypes should be avoided in .h files
#65: FILE: include/linux/uprobes.h:233:
+extern bool arch_uprobe_is_callable(unsigned long vtramp, unsigned long vaddr);

CHECK: extern prototypes should be avoided in .h files
#66: FILE: include/linux/uprobes.h:234:
+extern const struct vm_special_mapping *arch_uprobe_trampoline_mapping(void);

WARNING: Missing a blank line after declarations
#92: FILE: kernel/events/uprobes.c:632:
+	struct vm_area_struct *vma, *prev;
+	VMA_ITERATOR(vmi, mm, 0);

WARNING: line length of 86 exceeds 80 columns
#100: FILE: kernel/events/uprobes.c:640:
+			if (arch_uprobe_is_callable(vma->vm_start - PAGE_SIZE, vaddr))

WARNING: line length of 88 exceeds 80 columns
#134: FILE: kernel/events/uprobes.c:674:
+				VM_READ|VM_EXEC|VM_MAYEXEC|VM_MAYREAD|VM_DONTCOPY|VM_IO,

CHECK: Alignment should match open parenthesis
#134: FILE: kernel/events/uprobes.c:674:
+	vma = _install_special_mapping(mm, tramp->vaddr, PAGE_SIZE,
+				VM_READ|VM_EXEC|VM_MAYEXEC|VM_MAYREAD|VM_DONTCOPY|VM_IO,

CHECK: spaces preferred around that '|' (ctx:VxV)
#134: FILE: kernel/events/uprobes.c:674:
+				VM_READ|VM_EXEC|VM_MAYEXEC|VM_MAYREAD|VM_DONTCOPY|VM_IO,
 				       ^

CHECK: spaces preferred around that '|' (ctx:VxV)
#134: FILE: kernel/events/uprobes.c:674:
+				VM_READ|VM_EXEC|VM_MAYEXEC|VM_MAYREAD|VM_DONTCOPY|VM_IO,
 				               ^

CHECK: spaces preferred around that '|' (ctx:VxV)
#134: FILE: kernel/events/uprobes.c:674:
+				VM_READ|VM_EXEC|VM_MAYEXEC|VM_MAYREAD|VM_DONTCOPY|VM_IO,
 				                          ^

CHECK: spaces preferred around that '|' (ctx:VxV)
#134: FILE: kernel/events/uprobes.c:674:
+				VM_READ|VM_EXEC|VM_MAYEXEC|VM_MAYREAD|VM_DONTCOPY|VM_IO,
 				                                     ^

CHECK: spaces preferred around that '|' (ctx:VxV)
#134: FILE: kernel/events/uprobes.c:674:
+				VM_READ|VM_EXEC|VM_MAYEXEC|VM_MAYREAD|VM_DONTCOPY|VM_IO,
 				                                                 ^

CHECK: Comparison to NULL could be written "!tramp"
#173: FILE: kernel/events/uprobes.c:713:
+	if (tramp == NULL)

total: 0 errors, 4 warnings, 11 checks, 163 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 4e893ef5fa51 ("uprobes: Add mapping for optimized uprobe trampolines") 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, 4 warnings, 11 checks, 163 lines checked