Messages in this thread Patch in this message | | | From | Pingfan Liu <> | Subject | [PATCH 1/2] x86/boot: move early_serial_base to .data section | Date | Tue, 7 May 2019 14:00:59 +0800 |
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arch/x86/boot/compressed/head_64.S clears BSS after relocated. If early serial is set up before clearing BSS, the early_serial_base will be reset to 0.
Initializing early_serial_base as -1 to push it to .data section.
Signed-off-by: Pingfan Liu <kernelfans@gmail.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Borislav Petkov <bp@alien8.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Jordan Borgner <mail@jordan-borgner.de> Cc: linux-kernel@vger.kernel.org --- arch/x86/boot/compressed/early_serial_console.c | 2 +- arch/x86/boot/early_serial_console.c | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/boot/compressed/early_serial_console.c b/arch/x86/boot/compressed/early_serial_console.c index 261e81f..624e334 100644 --- a/arch/x86/boot/compressed/early_serial_console.c +++ b/arch/x86/boot/compressed/early_serial_console.c @@ -1,5 +1,5 @@ #include "misc.h" -int early_serial_base; +int early_serial_base = -1; #include "../early_serial_console.c" diff --git a/arch/x86/boot/early_serial_console.c b/arch/x86/boot/early_serial_console.c index 023bf1c..d8de15a 100644 --- a/arch/x86/boot/early_serial_console.c +++ b/arch/x86/boot/early_serial_console.c @@ -149,6 +149,6 @@ void console_init(void) { parse_earlyprintk(); - if (!early_serial_base) + if (early_serial_base <= 0) parse_console_uart8250(); } -- 2.7.4
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