Horms wrote:
On Tue, Jul 24, 2007 at 04:57:32PM -0700, Yinghai Lu wrote:
IA64
Subject : Regression in serial console on ia64 after 2.6.22
References : http://marc.info/?l=linux-ia64&m=118483645914066&w=2
Last known good : ?
Submitter : Horms <[email protected]>
Caused-By : Yinghai Lu <[email protected]>
commit 18a8bd949d6adb311ea816125ff65050df1f3f6e
Handled-By : ?
Status : unknown
please test this patch.
YH
I just posted a similar patch (sorry, I didn't see your post until
afterwards). I guess that we both have the same ideas :)
[PATCH] ia64: move machvec_init before parse_early_param
So ia64_mv is initialized before early console
Signed-off-by: Yinghai Lu <[email protected]>
diff --git a/arch/ia64/kernel/machvec.c b/arch/ia64/kernel/machvec.c
index 13df337..a94feaa 100644
--- a/arch/ia64/kernel/machvec.c
+++ b/arch/ia64/kernel/machvec.c
@@ -14,12 +14,6 @@ struct ia64_machine_vector ia64_mv;
EXPORT_SYMBOL(ia64_mv);
static __initdata const char *mvec_name;
-static __init int setup_mvec(char *s)
-{
- mvec_name = s;
- return 0;
-}
-early_param("machvec", setup_mvec);
static struct ia64_machine_vector * __init
lookup_machvec (const char *name)
@@ -42,6 +36,10 @@ machvec_init (const char *name)
if (!name)
name = mvec_name ? mvec_name : acpi_get_sysname();
I think that mvec_name can be disposed of all together as
its only used by the line above and setup_mvec(), which in
turn is only used by early_param. I got rid of mvec_name in
my incantation of this patch, and it seemed to work quite well.
with cmd_line or NULL, mvec_nanme could get assigned.
next machvec_init(NULL) could reuse that
+
+ if (!mvec_name)
+ mvec_name = name;
+
mv = lookup_machvec(name);
if (!mv)
panic("generic kernel failed to find machine vector for"
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index cf06fe7..b06d7b7 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -481,6 +481,9 @@ int __init reserve_elfcorehdr(unsigned long *start, unsigned long *end)
void __init
setup_arch (char **cmdline_p)
{
+#ifdef CONFIG_IA64_GENERIC
+ char *mvstr;
+#endif
unw_init();
ia64_patch_vtop((u64) __start___vtop_patchlist, (u64) __end___vtop_patchlist);
@@ -491,12 +494,15 @@ setup_arch (char **cmdline_p)
efi_init();
io_port_init();
- parse_early_param();
-
#ifdef CONFIG_IA64_GENERIC
- machvec_init(NULL);
+ mvstr = strstr(*cmd_line_p, "machvec=")
+ if (mvstr)
+ mvstr = strchr(mvstr, '=') + 1;
+ machvec_init(mvstr);
#endif
Do you need to copy and truncate mvstr on ' ' in the case
that machvec= isn't the last argument on the command line?
I did this in my patch, though I didn't test to see if
it was uneccessary.
or may need to update lookup_machvec...
from strcmp to strstr...
just want to the code to be less changes as possible.
YH
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