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extable: Skip sorting if sorted at build time.

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If the build program sortextable has already sorted the exception
table, don't sort it again.

Signed-off-by: David Daney <david.daney@cavium.com>
Link: http://lkml.kernel.org/r/1334872799-14589-3-git-send-email-ddaney.cavm@gmail.com
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
This commit is contained in:
David Daney 2012-04-19 14:59:56 -07:00 committed by H. Peter Anvin
parent a79f248b9b
commit d219e2e86a
1 changed files with 7 additions and 1 deletions
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8
kernel/extable.c
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@ -35,10 +35,16 @@ DEFINE_MUTEX(text_mutex);
extern struct exception_table_entry __start___ex_table[]; extern struct exception_table_entry __start___ex_table[];
extern struct exception_table_entry __stop___ex_table[]; extern struct exception_table_entry __stop___ex_table[];
/* Cleared by build time tools if the table is already sorted. */
u32 __initdata main_extable_sort_needed = 1;
/* Sort the kernel's built-in exception table */ /* Sort the kernel's built-in exception table */
void __init sort_main_extable(void) void __init sort_main_extable(void)
{ {
sort_extable(__start___ex_table, __stop___ex_table); if (main_extable_sort_needed)
sort_extable(__start___ex_table, __stop___ex_table);
else
pr_notice("__ex_table already sorted, skipping sort\n");
} }
/* Given an address, look for it in the exception tables. */ /* Given an address, look for it in the exception tables. */