kernel: fix a few minor compiler warnings

5 files changed, 10 insertions, 9 deletions

diff --git a/src/kernel/arch/i386/driver/fsroot.c b/src/kernel/arch/i386/driver/fsroot.c
index 49cecc9..e6e53cd 100644
--- a/src/kernel/arch/i386/driver/fsroot.c
+++ b/src/kernel/arch/i386/driver/fsroot.c
@@ -136,7 +136,7 @@ static void accept(struct vfs_request *req) {
 	}
 }
 
-static bool is_ready(struct vfs_backend *self) {
+static bool is_ready(struct vfs_backend __attribute__((unused)) *self) {
 	return true;
 }
 
diff --git a/src/kernel/arch/i386/driver/ps2.c b/src/kernel/arch/i386/driver/ps2.c
index 97e2878..aaa3156 100644
--- a/src/kernel/arch/i386/driver/ps2.c
+++ b/src/kernel/arch/i386/driver/ps2.c
@@ -54,7 +54,7 @@ static void accept(struct vfs_request *req) {
 				if (req->caller) {
 					// clamp between 0, sizeof buf
 					ret = req->output.len;
-					if (ret > sizeof buf) ret = sizeof buf;
+					if (ret > (int)sizeof buf) ret = sizeof buf;
 					if (ret < 0) ret = 0;
 
 					ret = ps2_read(buf, ret);
@@ -71,4 +71,6 @@ static void accept(struct vfs_request *req) {
 	}
 }
 
-static bool is_ready(struct vfs_backend *self) { return blocked_on == NULL; }
+static bool is_ready(struct vfs_backend __attribute__((unused)) *self) {
+	return blocked_on == NULL;
+}
diff --git a/src/kernel/arch/i386/driver/serial.c b/src/kernel/arch/i386/driver/serial.c
index 614d4e0..12cf2b8 100644
--- a/src/kernel/arch/i386/driver/serial.c
+++ b/src/kernel/arch/i386/driver/serial.c
@@ -92,7 +92,7 @@ static void accept(struct vfs_request *req) {
 				if (req->caller) {
 					// clamp between 0, sizeof buf
 					ret = req->output.len;
-					if (ret > sizeof buf) ret = sizeof buf;
+					if (ret > (int)sizeof buf) ret = sizeof buf;
 					if (ret < 0) ret = 0;
 
 					ret = serial_read(buf, ret);
@@ -120,4 +120,4 @@ static void accept(struct vfs_request *req) {
 	}
 }
 
-static bool is_ready(struct vfs_backend *self) { return blocked_on == NULL; }
+static bool is_ready(struct vfs_backend __attribute__((unused)) *self) { return blocked_on == NULL; }
diff --git a/src/kernel/arch/i386/sysenter.c b/src/kernel/arch/i386/sysenter.c
index 71dfbe9..5837474 100644
--- a/src/kernel/arch/i386/sysenter.c
+++ b/src/kernel/arch/i386/sysenter.c
@@ -14,14 +14,13 @@ void sysexit(struct registers regs) {
 }
 
 _Noreturn void sysenter_stage2(void) {
-	uint64_t val;
 	struct registers *regs = &process_current->regs;
 
 	*regs = _sysexit_regs; // save the registers
 	regs->esp = (userptr_t) regs->ecx; // fix them up
 	regs->eip = (userptr_t) regs->edx;
 
-	val = _syscall(regs->eax, regs->ebx,
-	               regs->esi, regs->edi, (uintptr_t)regs->ebp);
+	_syscall(regs->eax, regs->ebx,
+	         regs->esi, regs->edi, (uintptr_t)regs->ebp);
 	process_switch_any();
 }
diff --git a/src/kernel/arch/i386/tty/tty.c b/src/kernel/arch/i386/tty/tty.c
index a1964f9..aa63507 100644
--- a/src/kernel/arch/i386/tty/tty.c
+++ b/src/kernel/arch/i386/tty/tty.c
@@ -11,7 +11,7 @@ void tty_init(void) {
 	serial_write("<3 ", 3);
 }
 
-static void backend(void *arg, const char *buf, size_t len) {
+static void backend(void __attribute__((unused))  *arg, const char *buf, size_t len) {
 	vga_write(buf, len);
 	serial_write(buf, len);
 }