Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/arch/mips/kernel/ftrace.c b/arch/mips/kernel/ftrace.c
index b122cbb..2625232 100644
--- a/arch/mips/kernel/ftrace.c
+++ b/arch/mips/kernel/ftrace.c
@@ -86,7 +86,7 @@
return -EFAULT;
old_fs = get_fs();
- set_fs(get_ds());
+ set_fs(KERNEL_DS);
flush_icache_range(ip, ip + 8);
set_fs(old_fs);
@@ -111,7 +111,7 @@
ip -= 4;
old_fs = get_fs();
- set_fs(get_ds());
+ set_fs(KERNEL_DS);
flush_icache_range(ip, ip + 8);
set_fs(old_fs);
@@ -135,7 +135,7 @@
return -EFAULT;
old_fs = get_fs();
- set_fs(get_ds());
+ set_fs(KERNEL_DS);
flush_icache_range(ip, ip + 8);
set_fs(old_fs);
@@ -333,20 +333,21 @@
return;
/*
- * "parent_ra_addr" is the stack address saved the return address of
- * the caller of _mcount.
+ * "parent_ra_addr" is the stack address where the return address of
+ * the caller of _mcount is saved.
*
- * if the gcc < 4.5, a leaf function does not save the return address
- * in the stack address, so, we "emulate" one in _mcount's stack space,
- * and hijack it directly, but for a non-leaf function, it save the
- * return address to the its own stack space, we can not hijack it
- * directly, but need to find the real stack address,
- * ftrace_get_parent_addr() does it!
+ * If gcc < 4.5, a leaf function does not save the return address
+ * in the stack address, so we "emulate" one in _mcount's stack space,
+ * and hijack it directly.
+ * For a non-leaf function, it does save the return address to its own
+ * stack space, so we can not hijack it directly, but need to find the
+ * real stack address, which is done by ftrace_get_parent_addr().
*
- * if gcc>= 4.5, with the new -mmcount-ra-address option, for a
+ * If gcc >= 4.5, with the new -mmcount-ra-address option, for a
* non-leaf function, the location of the return address will be saved
- * to $12 for us, and for a leaf function, only put a zero into $12. we
- * do it in ftrace_graph_caller of mcount.S.
+ * to $12 for us.
+ * For a leaf function, it just puts a zero into $12, so we handle
+ * it in ftrace_graph_caller() of mcount.S.
*/
/* old_parent_ra = *parent_ra_addr; */
@@ -400,13 +401,13 @@
unsigned long __init arch_syscall_addr(int nr)
{
#ifdef CONFIG_MIPS32_N32
- if (nr >= __NR_N32_Linux && nr <= __NR_N32_Linux + __NR_N32_Linux_syscalls)
+ if (nr >= __NR_N32_Linux && nr < __NR_N32_Linux + __NR_N32_Linux_syscalls)
return (unsigned long)sysn32_call_table[nr - __NR_N32_Linux];
#endif
- if (nr >= __NR_64_Linux && nr <= __NR_64_Linux + __NR_64_Linux_syscalls)
+ if (nr >= __NR_64_Linux && nr < __NR_64_Linux + __NR_64_Linux_syscalls)
return (unsigned long)sys_call_table[nr - __NR_64_Linux];
#ifdef CONFIG_MIPS32_O32
- if (nr >= __NR_O32_Linux && nr <= __NR_O32_Linux + __NR_O32_Linux_syscalls)
+ if (nr >= __NR_O32_Linux && nr < __NR_O32_Linux + __NR_O32_Linux_syscalls)
return (unsigned long)sys32_call_table[nr - __NR_O32_Linux];
#endif