Merge tag 'tty-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/…

…git/gregkh/tty Pull tty/serial driver updates from Greg KH: "Here are the big set of tty and serial driver updates for 5.6-rc1 Included in here are: - dummy_con cleanups (touches lots of arch code) - sysrq logic cleanups (touches lots of serial drivers) - samsung driver fixes (wasn't really being built) - conmakeshash move to tty subdir out of scripts - lots of small tty/serial driver updates All of these have been in linux-next for a while with no reported issues" * tag 'tty-5.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty: (140 commits) tty: n_hdlc: Use flexible-array member and struct_size() helper tty: baudrate: SPARC supports few more baud rates tty: baudrate: Synchronise baud_table[] and baud_bits[] tty: serial: meson_uart: Add support for kernel debugger serial: imx: fix a race condition in receive path serial: 8250_bcm2835aux: Document struct bcm2835aux_data serial: 8250_bcm2835aux: Use generic remapping code serial: 8250_bcm2835aux: Allocate uart_8250_port on stack serial: 8250_bcm2835aux: Suppress register_port error on -EPROBE_DEFER serial: 8250_bcm2835aux: Suppress clk_get error on -EPROBE_DEFER serial: 8250_bcm2835aux: Fix line mismatch on driver unbind serial_core: Remove unused member in uart_port vt: Correct comment documenting do_take_over_console() vt: Delete comment referencing non-existent unbind_con_driver() arch/xtensa/setup: Drop dummy_con initialization arch/x86/setup: Drop dummy_con initialization arch/unicore32/setup: Drop dummy_con initialization arch/sparc/setup: Drop dummy_con initialization arch/sh/setup: Drop dummy_con initialization arch/s390/setup: Drop dummy_con initialization ...
akvadrako · Jan 29, 2020 · ca9b5b6 · ca9b5b6
2 parents aac9662 + 85f4c95
commit ca9b5b6
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Showing 106 changed files with 824 additions and 934 deletions.
diff --git a/MAINTAINERS b/MAINTAINERS
@@ -6181,6 +6181,12 @@ M:	Maxim Levitsky <[email protected]>
 S:	Maintained
 F:	drivers/media/rc/ene_ir.*
 
+EPAPR HYPERVISOR BYTE CHANNEL DEVICE DRIVER
+M:	Laurentiu Tudor <[email protected]>
+L:	[email protected]
+S:	Maintained
+F:	drivers/tty/ehv_bytechan.c
+
 EPSON S1D13XXX FRAMEBUFFER DRIVER
 M:	Kristoffer Ericson <[email protected]>
 S:	Maintained

diff --git a/arch/alpha/kernel/setup.c b/arch/alpha/kernel/setup.c
@@ -655,8 +655,6 @@ setup_arch(char **cmdline_p)
 #ifdef CONFIG_VT
 #if defined(CONFIG_VGA_CONSOLE)
 	conswitchp = &vga_con;
-#elif defined(CONFIG_DUMMY_CONSOLE)
-	conswitchp = &dummy_con;
 #endif
 #endif
 

diff --git a/arch/arc/kernel/setup.c b/arch/arc/kernel/setup.c
@@ -572,10 +572,6 @@ void __init setup_arch(char **cmdline_p)
 	 */
 	root_mountflags &= ~MS_RDONLY;
 
-#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
-	conswitchp = &dummy_con;
-#endif
-
 	arc_unwind_init();
 }
 

diff --git a/arch/arm/kernel/setup.c b/arch/arm/kernel/setup.c
@@ -1164,8 +1164,6 @@ void __init setup_arch(char **cmdline_p)
 #ifdef CONFIG_VT
 #if defined(CONFIG_VGA_CONSOLE)
 	conswitchp = &vga_con;
-#elif defined(CONFIG_DUMMY_CONSOLE)
-	conswitchp = &dummy_con;
 #endif
 #endif
 

diff --git a/arch/arm64/kernel/setup.c b/arch/arm64/kernel/setup.c
@@ -360,9 +360,6 @@ void __init setup_arch(char **cmdline_p)
 	init_task.thread_info.ttbr0 = __pa_symbol(empty_zero_page);
 #endif
 
-#ifdef CONFIG_VT
-	conswitchp = &dummy_con;
-#endif
 	if (boot_args[1] || boot_args[2] || boot_args[3]) {
 		pr_err("WARNING: x1-x3 nonzero in violation of boot protocol:\n"
 			"\tx1: %016llx\n\tx2: %016llx\n\tx3: %016llx\n"

diff --git a/arch/csky/kernel/setup.c b/arch/csky/kernel/setup.c
@@ -136,10 +136,6 @@ void __init setup_arch(char **cmdline_p)
 #ifdef CONFIG_HIGHMEM
 	kmap_init();
 #endif
-
-#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
-	conswitchp = &dummy_con;
-#endif
 }
 
 unsigned long va_pa_offset;

diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
@@ -608,9 +608,6 @@ setup_arch (char **cmdline_p)
 
 #ifdef CONFIG_VT
 	if (!conswitchp) {
-# if defined(CONFIG_DUMMY_CONSOLE)
-		conswitchp = &dummy_con;
-# endif
 # if defined(CONFIG_VGA_CONSOLE)
 		/*
 		 * Non-legacy systems may route legacy VGA MMIO range to system

diff --git a/arch/m68k/kernel/setup_mm.c b/arch/m68k/kernel/setup_mm.c
@@ -274,10 +274,6 @@ void __init setup_arch(char **cmdline_p)
 
 	parse_early_param();
 
-#ifdef CONFIG_DUMMY_CONSOLE
-	conswitchp = &dummy_con;
-#endif
-
 	switch (m68k_machtype) {
 #ifdef CONFIG_AMIGA
 	case MACH_AMIGA:

diff --git a/arch/m68k/kernel/setup_no.c b/arch/m68k/kernel/setup_no.c
@@ -146,10 +146,6 @@ void __init setup_arch(char **cmdline_p)
 	memcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);
 	boot_command_line[COMMAND_LINE_SIZE-1] = 0;
 
-#if defined(CONFIG_FRAMEBUFFER_CONSOLE) && defined(CONFIG_DUMMY_CONSOLE)
-	conswitchp = &dummy_con;
-#endif
-
 	/*
 	 * Give all the memory to the bootmap allocator, tell it to put the
 	 * boot mem_map at the start of memory.

diff --git a/arch/m68k/sun3x/config.c b/arch/m68k/sun3x/config.c
@@ -70,7 +70,6 @@ void __init config_sun3x(void)
 		break;
 	default:
 		serial_console = 0;
-		conswitchp = &dummy_con;
 		break;
 	}
 #endif

diff --git a/arch/microblaze/kernel/setup.c b/arch/microblaze/kernel/setup.c
@@ -65,10 +65,6 @@ void __init setup_arch(char **cmdline_p)
 	microblaze_cache_init();
 
 	xilinx_pci_init();
-
-#if defined(CONFIG_DUMMY_CONSOLE)
-	conswitchp = &dummy_con;
-#endif
 }
 
 #ifdef CONFIG_MTD_UCLINUX

diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c
@@ -796,8 +796,6 @@ void __init setup_arch(char **cmdline_p)
 #if defined(CONFIG_VT)
 #if defined(CONFIG_VGA_CONSOLE)
 	conswitchp = &vga_con;
-#elif defined(CONFIG_DUMMY_CONSOLE)
-	conswitchp = &dummy_con;
 #endif
 #endif
 

diff --git a/arch/nds32/kernel/setup.c b/arch/nds32/kernel/setup.c
@@ -317,11 +317,6 @@ void __init setup_arch(char **cmdline_p)
 
 	unflatten_and_copy_device_tree();
 
-	if(IS_ENABLED(CONFIG_VT)) {
-		if(IS_ENABLED(CONFIG_DUMMY_CONSOLE))
-			conswitchp = &dummy_con;
-	}
-
 	*cmdline_p = boot_command_line;
 	early_trap_init();
 }

diff --git a/arch/nios2/kernel/setup.c b/arch/nios2/kernel/setup.c
@@ -196,8 +196,4 @@ void __init setup_arch(char **cmdline_p)
 	 * get kmalloc into gear
 	 */
 	paging_init();
-
-#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
-	conswitchp = &dummy_con;
-#endif
 }
diff --git a/arch/openrisc/kernel/setup.c b/arch/openrisc/kernel/setup.c
@@ -308,11 +308,6 @@ void __init setup_arch(char **cmdline_p)
 	/* paging_init() sets up the MMU and marks all pages as reserved */
 	paging_init();
 
-#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
-	if (!conswitchp)
-		conswitchp = &dummy_con;
-#endif
-
 	*cmdline_p = boot_command_line;
 
 	printk(KERN_INFO "OpenRISC Linux -- http://openrisc.io\n");

diff --git a/arch/parisc/kernel/setup.c b/arch/parisc/kernel/setup.c
@@ -151,10 +151,6 @@ void __init setup_arch(char **cmdline_p)
 	dma_ops_init();
 #endif
 
-#if defined(CONFIG_VT) && defined(CONFIG_DUMMY_CONSOLE)
-	conswitchp = &dummy_con;	/* we use do_take_over_console() later ! */
-#endif
-
 	clear_sched_clock_stable();
 }
 

diff --git a/arch/powerpc/kernel/legacy_serial.c b/arch/powerpc/kernel/legacy_serial.c
@@ -479,8 +479,10 @@ static void __init fixup_port_irq(int index,
 	port->irq = virq;
 
 #ifdef CONFIG_SERIAL_8250_FSL
-	if (of_device_is_compatible(np, "fsl,ns16550"))
+	if (of_device_is_compatible(np, "fsl,ns16550")) {
 		port->handle_irq = fsl8250_handle_irq;
+		port->has_sysrq = IS_ENABLED(CONFIG_SERIAL_8250_CONSOLE);
+	}
 #endif
 }
 

diff --git a/arch/powerpc/kernel/setup-common.c b/arch/powerpc/kernel/setup-common.c
@@ -949,9 +949,6 @@ void __init setup_arch(char **cmdline_p)
 
 	early_memtest(min_low_pfn << PAGE_SHIFT, max_low_pfn << PAGE_SHIFT);
 
-	if (IS_ENABLED(CONFIG_DUMMY_CONSOLE))
-		conswitchp = &dummy_con;
-
 	if (ppc_md.setup_arch)
 		ppc_md.setup_arch();
 

diff --git a/arch/powerpc/platforms/cell/setup.c b/arch/powerpc/platforms/cell/setup.c
@@ -240,9 +240,6 @@ static void __init cell_setup_arch(void)
 	init_pci_config_tokens();
 
 	cbe_pervasive_init();
-#ifdef CONFIG_DUMMY_CONSOLE
-	conswitchp = &dummy_con;
-#endif
 
 	mmio_nvram_init();
 }

diff --git a/arch/powerpc/platforms/maple/setup.c b/arch/powerpc/platforms/maple/setup.c
@@ -183,9 +183,6 @@ static void __init maple_setup_arch(void)
 	/* Lookup PCI hosts */
        	maple_pci_init();
 
-#ifdef CONFIG_DUMMY_CONSOLE
-	conswitchp = &dummy_con;
-#endif
 	maple_use_rtas_reboot_and_halt_if_present();
 
 	printk(KERN_DEBUG "Using native/NAP idle loop\n");

diff --git a/arch/powerpc/platforms/pasemi/setup.c b/arch/powerpc/platforms/pasemi/setup.c
@@ -147,10 +147,6 @@ static void __init pas_setup_arch(void)
 	/* Lookup PCI hosts */
 	pas_pci_init();
 
-#ifdef CONFIG_DUMMY_CONSOLE
-	conswitchp = &dummy_con;
-#endif
-
 	/* Remap SDC register for doing reset */
 	/* XXXOJN This should maybe come out of the device tree */
 	reset_reg = ioremap(0xfc101100, 4);

diff --git a/arch/powerpc/platforms/ps3/setup.c b/arch/powerpc/platforms/ps3/setup.c
@@ -200,10 +200,6 @@ static void __init ps3_setup_arch(void)
 	smp_init_ps3();
 #endif
 
-#ifdef CONFIG_DUMMY_CONSOLE
-	conswitchp = &dummy_con;
-#endif
-
 	prealloc_ps3fb_videomemory();
 	prealloc_ps3flash_bounce_buffer();
 

diff --git a/arch/riscv/kernel/setup.c b/arch/riscv/kernel/setup.c
@@ -78,9 +78,5 @@ void __init setup_arch(char **cmdline_p)
 	setup_smp();
 #endif
 
-#ifdef CONFIG_DUMMY_CONSOLE
-	conswitchp = &dummy_con;
-#endif
-
 	riscv_fill_hwcap();
 }
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
@@ -241,8 +241,6 @@ static void __init conmode_default(void)
 		SET_CONSOLE_SCLP;
 #endif
 	}
-	if (IS_ENABLED(CONFIG_VT) && IS_ENABLED(CONFIG_DUMMY_CONSOLE))
-		conswitchp = &dummy_con;
 }
 
 #ifdef CONFIG_CRASH_DUMP

diff --git a/arch/sh/kernel/setup.c b/arch/sh/kernel/setup.c
@@ -341,10 +341,6 @@ void __init setup_arch(char **cmdline_p)
 
 	paging_init();
 
-#ifdef CONFIG_DUMMY_CONSOLE
-	conswitchp = &dummy_con;
-#endif
-
 	/* Perform the machine specific initialisation */
 	if (likely(sh_mv.mv_setup))
 		sh_mv.mv_setup(cmdline_p);

diff --git a/arch/sparc/kernel/setup_32.c b/arch/sparc/kernel/setup_32.c
@@ -332,10 +332,6 @@ void __init setup_arch(char **cmdline_p)
 		break;
 	}
 
-#ifdef CONFIG_DUMMY_CONSOLE
-	conswitchp = &dummy_con;
-#endif
-
 	idprom_init();
 	load_mmu();
 

diff --git a/arch/sparc/kernel/setup_64.c b/arch/sparc/kernel/setup_64.c
@@ -653,10 +653,6 @@ void __init setup_arch(char **cmdline_p)
 	else
 		pr_info("ARCH: SUN4U\n");
 
-#ifdef CONFIG_DUMMY_CONSOLE
-	conswitchp = &dummy_con;
-#endif
-
 	idprom_init();
 
 	if (!root_flags)

diff --git a/arch/unicore32/kernel/setup.c b/arch/unicore32/kernel/setup.c
@@ -270,8 +270,6 @@ void __init setup_arch(char **cmdline_p)
 #ifdef CONFIG_VT
 #if defined(CONFIG_VGA_CONSOLE)
 	conswitchp = &vga_con;
-#elif defined(CONFIG_DUMMY_CONSOLE)
-	conswitchp = &dummy_con;
 #endif
 #endif
 	early_trap_init();

diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
@@ -1228,8 +1228,6 @@ void __init setup_arch(char **cmdline_p)
 #if defined(CONFIG_VGA_CONSOLE)
 	if (!efi_enabled(EFI_BOOT) || (efi_mem_type(0xa0000) != EFI_CONVENTIONAL_MEMORY))
 		conswitchp = &vga_con;
-#elif defined(CONFIG_DUMMY_CONSOLE)
-	conswitchp = &dummy_con;
 #endif
 #endif
 	x86_init.oem.banner();

diff --git a/arch/xtensa/kernel/setup.c b/arch/xtensa/kernel/setup.c
@@ -405,8 +405,6 @@ void __init setup_arch(char **cmdline_p)
 #ifdef CONFIG_VT
 # if defined(CONFIG_VGA_CONSOLE)
 	conswitchp = &vga_con;
-# elif defined(CONFIG_DUMMY_CONSOLE)
-	conswitchp = &dummy_con;
 # endif
 #endif
 }

diff --git a/drivers/char/ttyprintk.c b/drivers/char/ttyprintk.c
@@ -15,10 +15,11 @@
 #include <linux/serial.h>
 #include <linux/tty.h>
 #include <linux/module.h>
+#include <linux/spinlock.h>
 
 struct ttyprintk_port {
 	struct tty_port port;
-	struct mutex port_write_mutex;
+	spinlock_t spinlock;
 };
 
 static struct ttyprintk_port tpk_port;
@@ -99,11 +100,12 @@ static int tpk_open(struct tty_struct *tty, struct file *filp)
 static void tpk_close(struct tty_struct *tty, struct file *filp)
 {
 	struct ttyprintk_port *tpkp = tty->driver_data;
+	unsigned long flags;
 
-	mutex_lock(&tpkp->port_write_mutex);
+	spin_lock_irqsave(&tpkp->spinlock, flags);
 	/* flush tpk_printk buffer */
 	tpk_printk(NULL, 0);
-	mutex_unlock(&tpkp->port_write_mutex);
+	spin_unlock_irqrestore(&tpkp->spinlock, flags);
 
 	tty_port_close(&tpkp->port, tty, filp);
 }
@@ -115,13 +117,14 @@ static int tpk_write(struct tty_struct *tty,
 		const unsigned char *buf, int count)
 {
 	struct ttyprintk_port *tpkp = tty->driver_data;
+	unsigned long flags;
 	int ret;
 
 
 	/* exclusive use of tpk_printk within this tty */
-	mutex_lock(&tpkp->port_write_mutex);
+	spin_lock_irqsave(&tpkp->spinlock, flags);
 	ret = tpk_printk(buf, count);
-	mutex_unlock(&tpkp->port_write_mutex);
+	spin_unlock_irqrestore(&tpkp->spinlock, flags);
 
 	return ret;
 }
@@ -171,7 +174,7 @@ static int __init ttyprintk_init(void)
 {
 	int ret = -ENOMEM;
 
-	mutex_init(&tpk_port.port_write_mutex);
+	spin_lock_init(&tpk_port.spinlock);
 
 	ttyprintk_driver = tty_alloc_driver(1,
 			TTY_DRIVER_RESET_TERMIOS |
-Original file line number
+Diff line change
@@ Expand Up / @@ -70,7 +70,6 @@ void __init config_sun3x(void) @@
     		break;
     	default:
     		serial_console = 0;
-    		conswitchp = &dummy_con;
     		break;
     	}
     #endif
@@ Expand Down @@