xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

maccess: rename probe_kernel_{read,write} to copy_{from,to}_kernel_nofault

Browse Source 
Better describe what these functions do.

Suggested-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Christoph Hellwig
2020-06-17 09:37:53 +02:00
committed by Linus Torvalds
parent b3a9e3b962
commit fe557319aa
50 changed files with 138 additions and 122 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
arch/x86/kernel/ftrace.c
View File

@@ -86,7 +86,7 @@ static int ftrace_verify_code(unsigned long ip, const char *old_code)
* sure what we read is what we expected it to be before modifying it.
*/
/* read the text we want to modify */
if (probe_kernel_read(cur_code, (void *)ip, MCOUNT_INSN_SIZE)) {
if (copy_from_kernel_nofault(cur_code, (void *)ip, MCOUNT_INSN_SIZE)) {
WARN_ON(1);
return -EFAULT;
}
@@ -355,7 +355,7 @@ create_trampoline(struct ftrace_ops *ops, unsigned int *tramp_size)
npages = DIV_ROUND_UP(*tramp_size, PAGE_SIZE);
/* Copy ftrace_caller onto the trampoline memory */
ret = probe_kernel_read(trampoline, (void *)start_offset, size);
ret = copy_from_kernel_nofault(trampoline, (void *)start_offset, size);
if (WARN_ON(ret < 0))
goto fail;
@@ -363,13 +363,13 @@ create_trampoline(struct ftrace_ops *ops, unsigned int *tramp_size)
/* The trampoline ends with ret(q) */
retq = (unsigned long)ftrace_stub;
ret = probe_kernel_read(ip, (void *)retq, RET_SIZE);
ret = copy_from_kernel_nofault(ip, (void *)retq, RET_SIZE);
if (WARN_ON(ret < 0))
goto fail;
if (ops->flags & FTRACE_OPS_FL_SAVE_REGS) {
ip = trampoline + (ftrace_regs_caller_ret - ftrace_regs_caller);
ret = probe_kernel_read(ip, (void *)retq, RET_SIZE);
ret = copy_from_kernel_nofault(ip, (void *)retq, RET_SIZE);
if (WARN_ON(ret < 0))
goto fail;
}
@@ -506,7 +506,7 @@ static void *addr_from_call(void *ptr)
union text_poke_insn call;
int ret;
ret = probe_kernel_read(&call, ptr, CALL_INSN_SIZE);
ret = copy_from_kernel_nofault(&call, ptr, CALL_INSN_SIZE);
if (WARN_ON_ONCE(ret < 0))
return NULL;