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

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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

6
kernel/debug/debug_core.c
View File

@@ -169,18 +169,18 @@ int __weak kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt)
{
int err;
err = probe_kernel_read(bpt->saved_instr, (char *)bpt->bpt_addr,
err = copy_from_kernel_nofault(bpt->saved_instr, (char *)bpt->bpt_addr,
BREAK_INSTR_SIZE);
if (err)
return err;
err = probe_kernel_write((char *)bpt->bpt_addr,
err = copy_to_kernel_nofault((char *)bpt->bpt_addr,
arch_kgdb_ops.gdb_bpt_instr, BREAK_INSTR_SIZE);
return err;
}
int __weak kgdb_arch_remove_breakpoint(struct kgdb_bkpt *bpt)
{
return probe_kernel_write((char *)bpt->bpt_addr,
return copy_to_kernel_nofault((char *)bpt->bpt_addr,
(char *)bpt->saved_instr, BREAK_INSTR_SIZE);
}

6
kernel/debug/gdbstub.c
View File

@@ -247,7 +247,7 @@ char *kgdb_mem2hex(char *mem, char *buf, int count)
*/
tmp = buf + count;
err = probe_kernel_read(tmp, mem, count);
err = copy_from_kernel_nofault(tmp, mem, count);
if (err)
return NULL;
while (count > 0) {
@@ -283,7 +283,7 @@ int kgdb_hex2mem(char *buf, char *mem, int count)
*tmp_raw |= hex_to_bin(*tmp_hex--) << 4;
}
return probe_kernel_write(mem, tmp_raw, count);
return copy_to_kernel_nofault(mem, tmp_raw, count);
}
/*
@@ -335,7 +335,7 @@ static int kgdb_ebin2mem(char *buf, char *mem, int count)
size++;
}
return probe_kernel_write(mem, c, size);
return copy_to_kernel_nofault(mem, c, size);
}
#if DBG_MAX_REG_NUM > 0

3
kernel/debug/kdb/kdb_main.c
View File

@@ -2326,7 +2326,8 @@ void kdb_ps1(const struct task_struct *p)
int cpu;
unsigned long tmp;
if (!p || probe_kernel_read(&tmp, (char *)p, sizeof(unsigned long)))
if (!p ||
copy_from_kernel_nofault(&tmp, (char *)p, sizeof(unsigned long)))
return;
cpu = kdb_process_cpu(p);

7
kernel/debug/kdb/kdb_support.c
View File

@@ -325,7 +325,7 @@ char *kdb_strdup(const char *str, gfp_t type)
*/
int kdb_getarea_size(void *res, unsigned long addr, size_t size)
{
int ret = probe_kernel_read((char *)res, (char *)addr, size);
int ret = copy_from_kernel_nofault((char *)res, (char *)addr, size);
if (ret) {
if (!KDB_STATE(SUPPRESS)) {
kdb_printf("kdb_getarea: Bad address 0x%lx\n", addr);
@@ -350,7 +350,7 @@ int kdb_getarea_size(void *res, unsigned long addr, size_t size)
*/
int kdb_putarea_size(unsigned long addr, void *res, size_t size)
{
int ret = probe_kernel_read((char *)addr, (char *)res, size);
int ret = copy_from_kernel_nofault((char *)addr, (char *)res, size);
if (ret) {
if (!KDB_STATE(SUPPRESS)) {
kdb_printf("kdb_putarea: Bad address 0x%lx\n", addr);
@@ -624,7 +624,8 @@ char kdb_task_state_char (const struct task_struct *p)
char state;
unsigned long tmp;
if (!p || probe_kernel_read(&tmp, (char *)p, sizeof(unsigned long)))
if (!p ||
copy_from_kernel_nofault(&tmp, (char *)p, sizeof(unsigned long)))
return 'E';
cpu = kdb_process_cpu(p);