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| author | David Daney <david.daney@cavium.com> | 2012-04-19 14:59:56 -0700 |
|---|---|---|
| committer | H. Peter Anvin <hpa@linux.intel.com> | 2012-04-19 15:06:55 -0700 |
| commit | d219e2e86a407035303b987e4184ca0b1de53257 (patch) | |
| tree | be4d5b013da158a749064a24716dbeb628ff1f9c /kernel/extable.c | |
| parent | a79f248b9b309ebb5f34ca6a8fd1eb9e18db5720 (diff) | |
| download | lwn-d219e2e86a407035303b987e4184ca0b1de53257.tar.gz lwn-d219e2e86a407035303b987e4184ca0b1de53257.zip | |
extable: Skip sorting if sorted at build time.
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>
Diffstat (limited to 'kernel/extable.c')
| -rw-r--r-- | kernel/extable.c | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/kernel/extable.c b/kernel/extable.c index 5339705b8241..fe35a634bf76 100644 --- a/kernel/extable.c +++ b/kernel/extable.c @@ -35,10 +35,16 @@ DEFINE_MUTEX(text_mutex); extern struct exception_table_entry __start___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 */ 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. */ |