From 59771ff461d93cbaed87a574dcbd10f08a15fcb9 Mon Sep 17 00:00:00 2001
From: Huihuang Shi <huihuang.shi@intel.com>
Date: Thu, 26 Jul 2018 12:03:12 +0800
Subject: [PATCH] HV:treewide:fix "Reference parameter to procedure is
 reassigned"

Parameter's type which is pointer should not be changed in the
scope of function,assign it's value to local variable to fixed
it out.

Signed-off-by: Huihuang Shi <huihuang.shi@intel.com>
Reviewed-by: Junjie Mao <junjie.mao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
---
 hypervisor/arch/x86/assign.c                |  3 ++-
 hypervisor/arch/x86/guest/guest.c           |  6 +++--
 hypervisor/arch/x86/guest/vioapic.c         |  3 ++-
 hypervisor/arch/x86/ioapic.c                |  3 ++-
 hypervisor/arch/x86/irq.c                   |  3 ++-
 hypervisor/arch/x86/mmu.c                   |  6 +++--
 hypervisor/common/hv_main.c                 |  3 ++-
 hypervisor/common/io_request.c              |  3 ++-
 hypervisor/debug/console.c                  |  6 +++--
 hypervisor/debug/printf.c                   |  4 +++-
 hypervisor/debug/serial.c                   |  3 ++-
 hypervisor/debug/serial_internal.h          |  2 +-
 hypervisor/include/arch/x86/guest/guest.h   |  2 +-
 hypervisor/include/arch/x86/guest/vioapic.h |  2 +-
 hypervisor/include/arch/x86/ioapic.h        |  2 +-
 hypervisor/include/arch/x86/irq.h           |  2 +-
 hypervisor/include/arch/x86/vmexit.h        |  2 +-
 hypervisor/include/common/ptdev.h           |  2 +-
 hypervisor/include/debug/console.h          |  4 ++--
 hypervisor/include/lib/rtl.h                | 12 +++++-----
 hypervisor/include/lib/sprintf.h            |  4 ++--
 hypervisor/lib/sprintf.c                    | 19 ++++++++++-----
 hypervisor/lib/string.c                     | 26 ++++++++++++++-------
 23 files changed, 76 insertions(+), 46 deletions(-)

diff --git a/hypervisor/arch/x86/assign.c b/hypervisor/arch/x86/assign.c
index 77b48e140..c73c95613 100644
--- a/hypervisor/arch/x86/assign.c
+++ b/hypervisor/arch/x86/assign.c
@@ -1009,8 +1009,9 @@ static void get_entry_info(struct ptdev_remapping_info *entry, char *type,
 	}
 }
 
-void get_ptdev_info(char *str, int str_max)
+void get_ptdev_info(char *str_arg, int str_max)
 {
+	char *str = str_arg;
 	struct ptdev_remapping_info *entry;
 	int len, size = str_max;
 	uint32_t irq, vector;
diff --git a/hypervisor/arch/x86/guest/guest.c b/hypervisor/arch/x86/guest/guest.c
index 91ed7f75c..df996c897 100644
--- a/hypervisor/arch/x86/guest/guest.c
+++ b/hypervisor/arch/x86/guest/guest.c
@@ -352,9 +352,10 @@ static inline uint32_t _copy_gpa(struct vm *vm, void *h_ptr, uint64_t gpa,
 	return len;
 }
 
-static inline int copy_gpa(struct vm *vm, void *h_ptr, uint64_t gpa_arg,
+static inline int copy_gpa(struct vm *vm, void *h_ptr_arg, uint64_t gpa_arg,
 	uint32_t size_arg, bool cp_from_vm)
 {
+	void *h_ptr = h_ptr_arg;
 	uint32_t len;
 	uint64_t gpa = gpa_arg;
 	uint32_t size = size_arg;
@@ -378,9 +379,10 @@ static inline int copy_gpa(struct vm *vm, void *h_ptr, uint64_t gpa_arg,
 	return 0;
 }
 
-static inline int copy_gva(struct vcpu *vcpu, void *h_ptr, uint64_t gva_arg,
+static inline int copy_gva(struct vcpu *vcpu, void *h_ptr_arg, uint64_t gva_arg,
 	uint32_t size_arg, uint32_t *err_code, bool cp_from_vm)
 {
+	void *h_ptr = h_ptr_arg;
 	uint64_t gpa = 0UL;
 	int32_t ret;
 	uint32_t len;
diff --git a/hypervisor/arch/x86/guest/vioapic.c b/hypervisor/arch/x86/guest/vioapic.c
index 09e81ea28..7ef2bd810 100644
--- a/hypervisor/arch/x86/guest/vioapic.c
+++ b/hypervisor/arch/x86/guest/vioapic.c
@@ -644,8 +644,9 @@ bool vioapic_get_rte(struct vm *vm, uint8_t pin, union ioapic_rte *rte)
 }
 
 #ifdef HV_DEBUG
-void get_vioapic_info(char *str, int str_max, uint16_t vmid)
+void get_vioapic_info(char *str_arg, int str_max, uint16_t vmid)
 {
+	char *str = str_arg;
 	int len, size = str_max;
 	union ioapic_rte rte;
 	uint32_t delmode, vector, dest;
diff --git a/hypervisor/arch/x86/ioapic.c b/hypervisor/arch/x86/ioapic.c
index e8ce649fb..6daf8607a 100644
--- a/hypervisor/arch/x86/ioapic.c
+++ b/hypervisor/arch/x86/ioapic.c
@@ -454,8 +454,9 @@ static void get_rte_info(union ioapic_rte rte, bool *mask, bool *irr,
 	*dest = (uint32_t)(rte.full >> APIC_ID_SHIFT);
 }
 
-int get_ioapic_info(char *str, int str_max_len)
+int get_ioapic_info(char *str_arg, int str_max_len)
 {
+	char *str = str_arg;
 	uint32_t irq;
 	int len, size = str_max_len;
 
diff --git a/hypervisor/arch/x86/irq.c b/hypervisor/arch/x86/irq.c
index 4d09cb8c0..fa5facbc6 100644
--- a/hypervisor/arch/x86/irq.c
+++ b/hypervisor/arch/x86/irq.c
@@ -685,8 +685,9 @@ pri_register_handler(uint32_t irq,
 }
 
 #ifdef HV_DEBUG
-void get_cpu_interrupt_info(char *str, int str_max)
+void get_cpu_interrupt_info(char *str_arg, int str_max)
 {
+	char *str = str_arg;
 	uint16_t pcpu_id;
 	uint32_t irq, vector;
 	int len, size = str_max;
diff --git a/hypervisor/arch/x86/mmu.c b/hypervisor/arch/x86/mmu.c
index f1b86964d..1b90e82b7 100644
--- a/hypervisor/arch/x86/mmu.c
+++ b/hypervisor/arch/x86/mmu.c
@@ -889,9 +889,11 @@ static uint64_t break_page_table(struct map_params *map_params, void *paddr,
 	return next_page_size;
 }
 
-static int modify_paging(struct map_params *map_params, void *paddr,
-		void *vaddr, uint64_t size, uint32_t flags, bool direct)
+static int modify_paging(struct map_params *map_params, void *paddr_arg,
+		void *vaddr_arg, uint64_t size, uint32_t flags, bool direct)
 {
+	void *vaddr = vaddr_arg;
+	void *paddr = paddr_arg;
 	int64_t  remaining_size;
 	uint64_t adjust_size;
 	uint64_t attr = flags;
diff --git a/hypervisor/common/hv_main.c b/hypervisor/common/hv_main.c
index 0071c4f6c..adf3b2f64 100644
--- a/hypervisor/common/hv_main.c
+++ b/hypervisor/common/hv_main.c
@@ -151,8 +151,9 @@ int32_t hv_main(uint16_t pcpu_id)
 }
 
 #ifdef HV_DEBUG
-void get_vmexit_profile(char *str, int str_max)
+void get_vmexit_profile(char *str_arg, int str_max)
 {
+	char *str = str_arg;
 	uint16_t cpu, i;
 	int len, size = str_max;
 
diff --git a/hypervisor/common/io_request.c b/hypervisor/common/io_request.c
index 4067c9f50..0a213ff50 100644
--- a/hypervisor/common/io_request.c
+++ b/hypervisor/common/io_request.c
@@ -157,8 +157,9 @@ static void _get_req_info_(struct vhm_request *req, int *id, char *type,
 	}
 }
 
-void get_req_info(char *str, int str_max)
+void get_req_info(char *str_arg, int str_max)
 {
+	char *str = str_arg;
 	uint32_t i;
 	int32_t len, size = str_max, client_id;
 	union vhm_request_buffer *req_buf;
diff --git a/hypervisor/debug/console.c b/hypervisor/debug/console.c
index 106078f12..b2268b63c 100644
--- a/hypervisor/debug/console.c
+++ b/hypervisor/debug/console.c
@@ -51,8 +51,9 @@ int console_putc(int ch)
 	return res;
 }
 
-int console_puts(const char *s)
+int console_puts(const char *s_arg)
 {
+	const char *s = s_arg;
 	int res = -1;
 	const char *p;
 
@@ -91,8 +92,9 @@ int console_puts(const char *s)
 	return res;
 }
 
-int console_write(const char *s, size_t len)
+int console_write(const char *s_arg, size_t len)
 {
+	const char *s = s_arg;
 	int res = -1;
 	const char *e;
 	const char *p;
diff --git a/hypervisor/debug/printf.c b/hypervisor/debug/printf.c
index a6af13cc5..ba0ef3e47 100644
--- a/hypervisor/debug/printf.c
+++ b/hypervisor/debug/printf.c
@@ -6,8 +6,10 @@
 
 #include <hypervisor.h>
 
-static int charout(int cmd, const char *s, uint32_t sz, void *hnd)
+static int charout(int cmd, const char *s_arg, uint32_t sz_arg, void *hnd)
 {
+	const char *s = s_arg;
+	uint32_t sz = sz_arg;
 	/* pointer to an integer to store the number of characters */
 	int *nchars = (int *)hnd;
 	/* working pointer */
diff --git a/hypervisor/debug/serial.c b/hypervisor/debug/serial.c
index 8f9a0c167..93eae78c4 100644
--- a/hypervisor/debug/serial.c
+++ b/hypervisor/debug/serial.c
@@ -317,8 +317,9 @@ static int serial_putc(uint32_t uart_handle, int c)
 	return ((bytes_written > 0U) ? c : (SERIAL_EOF));
 }
 
-int serial_puts(uint32_t uart_handle, const char *s, uint32_t length_arg)
+int serial_puts(uint32_t uart_handle, const char *s_arg, uint32_t length_arg)
 {
+	const char *s = s_arg;
 	const char *old_data = s;
 	uint32_t index;
 	struct uart *port;
diff --git a/hypervisor/debug/serial_internal.h b/hypervisor/debug/serial_internal.h
index 2956b5289..ef96bb6d0 100644
--- a/hypervisor/debug/serial_internal.h
+++ b/hypervisor/debug/serial_internal.h
@@ -178,7 +178,7 @@ extern struct tgt_uart Tgt_Uarts[SERIAL_MAX_DEVS];
 uint32_t serial_open(const char *uart_id);
 int serial_getc(uint32_t uart_handle);
 int serial_gets(uint32_t uart_handle, char *buffer, uint32_t length_arg);
-int serial_puts(uint32_t uart_handle, const char *s, uint32_t length_arg);
+int serial_puts(uint32_t uart_handle, const char *s_arg, uint32_t length_arg);
 uint32_t serial_get_rx_data(uint32_t uart_handle);
 
 #endif /* !SERIAL_INTER_H */
diff --git a/hypervisor/include/arch/x86/guest/guest.h b/hypervisor/include/arch/x86/guest/guest.h
index 3750484e1..c858798e8 100644
--- a/hypervisor/include/arch/x86/guest/guest.h
+++ b/hypervisor/include/arch/x86/guest/guest.h
@@ -120,7 +120,7 @@ int copy_to_gva(struct vcpu *vcpu, void *h_ptr, uint64_t gva,
 uint64_t create_guest_init_gdt(struct vm *vm, uint32_t *limit);
 
 #ifdef HV_DEBUG
-void get_req_info(char *str, int str_max);
+void get_req_info(char *str_arg, int str_max);
 #endif /* HV_DEBUG */
 
 #endif	/* !ASSEMBLER */
diff --git a/hypervisor/include/arch/x86/guest/vioapic.h b/hypervisor/include/arch/x86/guest/vioapic.h
index e196b7e0b..98f7f54b3 100644
--- a/hypervisor/include/arch/x86/guest/vioapic.h
+++ b/hypervisor/include/arch/x86/guest/vioapic.h
@@ -56,7 +56,7 @@ int	vioapic_mmio_access_handler(struct vcpu *vcpu, struct io_request *io_req,
 		void *handler_private_data);
 
 #ifdef HV_DEBUG
-void get_vioapic_info(char *str, int str_max, uint16_t vmid);
+void get_vioapic_info(char *str_arg, int str_max, uint16_t vmid);
 #endif /* HV_DEBUG */
 
 #endif
diff --git a/hypervisor/include/arch/x86/ioapic.h b/hypervisor/include/arch/x86/ioapic.h
index 4859f7134..bbdbc48ca 100644
--- a/hypervisor/include/arch/x86/ioapic.h
+++ b/hypervisor/include/arch/x86/ioapic.h
@@ -36,7 +36,7 @@ extern uint8_t legacy_irq_to_pin[NR_LEGACY_IRQ];
 extern uint8_t pic_ioapic_pin_map[NR_LEGACY_PIN];
 
 #ifdef HV_DEBUG
-int get_ioapic_info(char *str, int str_max_len);
+int get_ioapic_info(char *str_arg, int str_max_len);
 #endif /* HV_DEBUG */
 
 #endif /* IOAPIC_H */
diff --git a/hypervisor/include/arch/x86/irq.h b/hypervisor/include/arch/x86/irq.h
index e9d834ef7..e73b3ea25 100644
--- a/hypervisor/include/arch/x86/irq.h
+++ b/hypervisor/include/arch/x86/irq.h
@@ -94,7 +94,7 @@ void interrupt_init(uint16_t pcpu_id);
 void cancel_event_injection(struct vcpu *vcpu);
 
 #ifdef HV_DEBUG
-void get_cpu_interrupt_info(char *str, int str_max);
+void get_cpu_interrupt_info(char *str_arg, int str_max);
 #endif /* HV_DEBUG */
 
 #endif /* ARCH_IRQ_H */
diff --git a/hypervisor/include/arch/x86/vmexit.h b/hypervisor/include/arch/x86/vmexit.h
index fde6e61d9..4450c515d 100644
--- a/hypervisor/include/arch/x86/vmexit.h
+++ b/hypervisor/include/arch/x86/vmexit.h
@@ -48,7 +48,7 @@ int cr_access_vmexit_handler(struct vcpu *vcpu);
 	(VM_EXIT_QUALIFICATION_BIT_MASK(exit_qual, 31U, 16U) >> 16U)
 
 #ifdef HV_DEBUG
-void get_vmexit_profile(char *str, int str_max);
+void get_vmexit_profile(char *str_arg, int str_max);
 #endif /* HV_DEBUG */
 
 #endif /* VMEXIT_H_ */
diff --git a/hypervisor/include/common/ptdev.h b/hypervisor/include/common/ptdev.h
index 78509f80e..181c8c81f 100644
--- a/hypervisor/include/common/ptdev.h
+++ b/hypervisor/include/common/ptdev.h
@@ -81,7 +81,7 @@ void ptdev_activate_entry(
 void ptdev_deactivate_entry(struct ptdev_remapping_info *entry);
 
 #ifdef HV_DEBUG
-void get_ptdev_info(char *str, int str_max);
+void get_ptdev_info(char *str_arg, int str_max);
 #endif /* HV_DEBUG */
 
 #endif /* PTDEV_H */
diff --git a/hypervisor/include/debug/console.h b/hypervisor/include/debug/console.h
index a0d418e5c..4a3ddeac1 100644
--- a/hypervisor/include/debug/console.h
+++ b/hypervisor/include/debug/console.h
@@ -24,7 +24,7 @@ void console_init(void);
  *          and no character was written.
  */
 
-int console_puts(const char *str);
+int console_puts(const char *s_arg);
 
 /** Writes a given number of characters to the console.
  *
@@ -35,7 +35,7 @@ int console_puts(const char *str);
  *          and no character was written.
  */
 
-int console_write(const char *str, size_t len);
+int console_write(const char *s_arg, size_t len);
 
 /** Writes a single character to the console.
  *
diff --git a/hypervisor/include/lib/rtl.h b/hypervisor/include/lib/rtl.h
index 9ab50a37f..f025b0510 100644
--- a/hypervisor/include/lib/rtl.h
+++ b/hypervisor/include/lib/rtl.h
@@ -28,13 +28,13 @@ struct udiv_result {
 /* Function prototypes */
 void udelay(uint32_t us);
 void *memchr(const void *void_s, int c, size_t n);
-int strcmp(const char *s1, const char *s2);
-int strncmp(const char *s1, const char *s2, size_t n);
-char *strcpy_s(char *d, size_t dmax, const char *s_arg);
-char *strncpy_s(char *d, size_t dmax, const char *s, size_t slen_arg);
-char *strchr(const char *s, int ch);
+int strcmp(const char *s1_arg, const char *s2_arg);
+int strncmp(const char *s1_arg, const char *s2_arg, size_t n_arg);
+char *strcpy_s(char *d_arg, size_t dmax, const char *s_arg);
+char *strncpy_s(char *d_arg, size_t dmax, const char *s, size_t slen_arg);
+char *strchr(const char *s_arg, int ch);
 void mdelay(uint32_t loop_count_arg);
-size_t strnlen_s(const char *str, size_t maxlen_arg);
+size_t strnlen_s(const char *str_arg, size_t maxlen_arg);
 void *memset(void *base, uint8_t v, size_t n);
 void *memcpy_s(void *d, size_t dmax, const void *s, size_t slen_arg);
 int udiv64(uint64_t dividend_arg, uint64_t divisor_arg, struct udiv_result *res);
diff --git a/hypervisor/include/lib/sprintf.h b/hypervisor/include/lib/sprintf.h
index feb4d39ba..eab0b3048 100644
--- a/hypervisor/include/lib/sprintf.h
+++ b/hypervisor/include/lib/sprintf.h
@@ -42,7 +42,7 @@ struct print_param {
 	} vars;
 };
 
-int do_print(const char *fmt, struct print_param *param,
+int do_print(const char *fmt_arg, struct print_param *param,
 		__builtin_va_list args);
 
 /**  The well known vsnprintf() function.
@@ -56,7 +56,7 @@ int do_print(const char *fmt, struct print_param *param,
  * @return The number of bytes which would be written, even if the destination
  *         is smaller. On error a negative number is returned.
  */
-int vsnprintf(char *dst, size_t sz, const char *fmt, va_list args);
+int vsnprintf(char *dst_arg, size_t sz_arg, const char *fmt, va_list args);
 
 /** The well known snprintf() function.
  *
diff --git a/hypervisor/lib/sprintf.c b/hypervisor/lib/sprintf.c
index e0e896cdb..a30519628 100644
--- a/hypervisor/lib/sprintf.c
+++ b/hypervisor/lib/sprintf.c
@@ -83,8 +83,9 @@ static const char lower_hex_digits[] = {
 	'a', 'b', 'c', 'd', 'e', 'f', 'x'
 };
 
-static const char *get_param(const char *s, uint32_t *x)
+static const char *get_param(const char *s_arg, uint32_t *x)
 {
+	const char *s = s_arg;
 	*x = 0U;
 
 	/* ignore '-' for negative numbers, it will be handled in flags*/
@@ -102,8 +103,9 @@ static const char *get_param(const char *s, uint32_t *x)
 	return s;
 }
 
-static const char *get_flags(const char *s, uint32_t *flags)
+static const char *get_flags(const char *s_arg, uint32_t *flags)
 {
+	const char *s = s_arg;
 	/* contains the flag characters */
 	static const char flagchars[] = "#0- +";
 	/* contains the numeric flags for the characters above */
@@ -152,9 +154,10 @@ static const char *get_flags(const char *s, uint32_t *flags)
 	return s;
 }
 
-static const char *get_length_modifier(const char *s,
+static const char *get_length_modifier(const char *s_arg,
 			uint32_t *flags, uint64_t *mask)
 {
+	const char *s = s_arg;
 	if (*s == 'h') {
 		/* check for h[h] (char/short) */
 		s++;
@@ -460,9 +463,10 @@ static int print_string(struct print_param *param, const char *s)
 	return res;
 }
 
-int do_print(const char *fmt, struct print_param *param,
+int do_print(const char *fmt_arg, struct print_param *param,
 		__builtin_va_list args)
 {
+	const char *fmt = fmt_arg;
 	/* the result of this function */
 	int res = 0;
 	/* temp. storage for the next character */
@@ -616,8 +620,9 @@ int do_print(const char *fmt, struct print_param *param,
 	return res;
 }
 
-static int charmem(int cmd, const char *s, uint32_t sz, void *hnd)
+static int charmem(int cmd, const char *s_arg, uint32_t sz, void *hnd)
 {
+	const char *s = s_arg;
 	/* pointer to the snprint parameter list */
 	struct snprint_param *param = (struct snprint_param *) hnd;
 	/* pointer to the destination */
@@ -650,8 +655,10 @@ static int charmem(int cmd, const char *s, uint32_t sz, void *hnd)
 	return (int)n;
 }
 
-int vsnprintf(char *dst, size_t sz, const char *fmt, va_list args)
+int vsnprintf(char *dst_arg, size_t sz_arg, const char *fmt, va_list args)
 {
+	char *dst = dst_arg;
+	int32_t sz = sz_arg;
 	int res = 0;
 
 	if (sz == 0U || (dst == NULL)) {
diff --git a/hypervisor/lib/string.c b/hypervisor/lib/string.c
index b58f61bc9..db4f1453d 100644
--- a/hypervisor/lib/string.c
+++ b/hypervisor/lib/string.c
@@ -153,8 +153,9 @@ int atoi(const char *str)
 	return (int)strtol_deci(str);
 }
 
-char *strchr(const char *s, int ch)
+char *strchr(const char *s_arg, int ch)
 {
+	const char *s = s_arg;
 	while ((*s != '\0') && (*s != ch)) {
 		++s;
 	}
@@ -184,13 +185,13 @@ char *strchr(const char *s, int ch)
  *    1) both d and s shall not be null pointers.
  *    2) dmax shall not 0.
  */
-char *strcpy_s(char *d, size_t dmax, const char *s_arg)
+char *strcpy_s(char *d_arg, size_t dmax, const char *s_arg)
 {
-
+	char *d = d_arg;
+	const char *s = s_arg;
 	char *dest_base;
 	size_t dest_avail;
 	uint64_t overlap_guard;
-	const char *s = s_arg;
 
 	if (s == NULL || d == NULL || dmax == 0U) {
 		pr_err("%s: invalid src, dest buffer or length.", __func__);
@@ -261,8 +262,10 @@ char *strcpy_s(char *d, size_t dmax, const char *s_arg)
  *    3) will assert() if overlap happens or dest buffer has no
  *       enough space.
  */
-char *strncpy_s(char *d, size_t dmax, const char *s, size_t slen_arg)
+char *strncpy_s(char *d_arg, size_t dmax, const char *s_arg, size_t slen_arg)
 {
+	const char *s = s_arg;
+	char *d = d_arg;
 	char *dest_base;
 	size_t dest_avail;
 	uint64_t overlap_guard;
@@ -339,10 +342,11 @@ char *strncpy_s(char *d, size_t dmax, const char *s, size_t slen_arg)
  *    string length, excluding the null character.
  *    will return 0 if str is null.
  */
-size_t strnlen_s(const char *str, size_t maxlen_arg)
+size_t strnlen_s(const char *str_arg, size_t maxlen_arg)
 {
-	size_t count;
+	const char *str = str_arg;
 	size_t maxlen = maxlen_arg;
+	size_t count;
 
 	if (str == NULL) {
 		return 0;
@@ -371,8 +375,10 @@ static char hexdigit(uint8_t decimal_val)
 	return hexdigits[decimal_val & 0x0FU];
 }
 
-int strcmp(const char *s1, const char *s2)
+int strcmp(const char *s1_arg, const char *s2_arg)
 {
+	const char *s1 = s1_arg;
+	const char *s2 = s2_arg;
 	while (((*s1) != '\0') && ((*s2) != '\0') && ((*s1) == (*s2))) {
 		s1++;
 		s2++;
@@ -381,8 +387,10 @@ int strcmp(const char *s1, const char *s2)
 	return *s1 - *s2;
 }
 
-int strncmp(const char *s1, const char *s2, size_t n_arg)
+int strncmp(const char *s1_arg, const char *s2_arg, size_t n_arg)
 {
+	const char *s1 = s1_arg;
+	const char *s2 = s2_arg;
 	size_t n = n_arg;
 	while (((n - 1) != 0U) && ((*s1) != '\0') && ((*s2) != '\0')
 		&& ((*s1) == (*s2))) {