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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-12-25 21:15:23 (GMT) |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-12-25 21:15:23 (GMT) |
| commit | 682cb0cd82d526b5d1e8ceaccda4d9b7795db553 (patch) | |
| tree | 494d563751266cd771a85aa2469f114d6cb4c7f4 /drivers/tty/serial | |
| parent | a88164345b81292b55a8d4829fdd35c8d611cd7d (diff) | |
| parent | 079317a65d05ce52b69b7d47fe1fb419d40a4395 (diff) | |
| download | linux-682cb0cd82d526b5d1e8ceaccda4d9b7795db553.tar.xz | |
Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc
Pull sparc fixes from David Miller:
1) Finally make perf stack backtraces stable on sparc, several problems
(mostly due to the context in which the user copies from the stack
are done) contributed to this.
From Rob Gardner.
2) Export ADI capability if the cpu supports it.
3) Hook up userfaultfd system call.
4) When faults happen during user copies we really have to clean up and
restore the FPU state fully. Also from Rob Gardner
* git://git.kernel.org/pub/scm/linux/kernel/git/davem/sparc:
tty/serial: Skip 'NULL' char after console break when sysrq enabled
sparc64: fix FP corruption in user copy functions
sparc64: Perf should save/restore fault info
sparc64: Ensure perf can access user stacks
sparc64: Don't set %pil in rtrap_nmi too early
sparc64: Add ADI capability to cpu capabilities
tty: serial: constify sunhv_ops structs
sparc: Hook up userfaultfd system call
Diffstat (limited to 'drivers/tty/serial')
| -rw-r--r-- | drivers/tty/serial/sunhv.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/drivers/tty/serial/sunhv.c b/drivers/tty/serial/sunhv.c index 0640318..ca0d380 100644 --- a/drivers/tty/serial/sunhv.c +++ b/drivers/tty/serial/sunhv.c @@ -148,8 +148,10 @@ static int receive_chars_read(struct uart_port *port) uart_handle_dcd_change(port, 1); } - for (i = 0; i < bytes_read; i++) - uart_handle_sysrq_char(port, con_read_page[i]); + if (port->sysrq != 0 && *con_read_page) { + for (i = 0; i < bytes_read; i++) + uart_handle_sysrq_char(port, con_read_page[i]); + } if (port->state == NULL) continue; @@ -168,17 +170,17 @@ struct sunhv_ops { int (*receive_chars)(struct uart_port *port); }; -static struct sunhv_ops bychar_ops = { +static const struct sunhv_ops bychar_ops = { .transmit_chars = transmit_chars_putchar, .receive_chars = receive_chars_getchar, }; -static struct sunhv_ops bywrite_ops = { +static const struct sunhv_ops bywrite_ops = { .transmit_chars = transmit_chars_write, .receive_chars = receive_chars_read, }; -static struct sunhv_ops *sunhv_ops = &bychar_ops; +static const struct sunhv_ops *sunhv_ops = &bychar_ops; static struct tty_port *receive_chars(struct uart_port *port) { |