From: David Daney <ddaney.cavm@gmail.com>
To: linux-mips@linux-mips.org, ralf@linux-mips.org,
linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org,
linux-embedded@vger.kernel.org, x86@kernel.org
Cc: David Daney <david.daney@cavium.com>
Subject: [PATCH RFC 2/5] extable: Skip sorting if sorted at build time.
Date: Fri, 18 Nov 2011 11:37:45 -0800 [thread overview]
Message-ID: <1321645068-20475-3-git-send-email-ddaney.cavm@gmail.com> (raw)
In-Reply-To: <1321645068-20475-1-git-send-email-ddaney.cavm@gmail.com>
From: David Daney <david.daney@cavium.com>
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>
---
kernel/extable.c | 8 +++++++-
1 files changed, 7 insertions(+), 1 deletions(-)
diff --git a/kernel/extable.c b/kernel/extable.c
index 5339705..fe35a63 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. */
--
1.7.2.3
next prev parent reply other threads:[~2011-11-18 19:37 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-11-18 19:37 [PATCH RFC 0/5] Speed booting by sorting exception tables at build time David Daney
2011-11-18 19:37 ` [PATCH RFC 1/5] scripts: Add sortextable to sort the kernel's exception table David Daney
2011-11-20 23:22 ` Mike Frysinger
2011-11-21 18:25 ` David Daney
2011-11-21 18:50 ` Mike Frysinger
2011-11-21 19:16 ` David Daney
2011-11-21 20:08 ` Mike Frysinger
2011-11-20 23:26 ` H. Peter Anvin
2011-11-20 23:27 ` H. Peter Anvin
2011-11-20 23:28 ` David Woodhouse
2011-11-20 23:30 ` H. Peter Anvin
2011-11-21 18:51 ` David Daney
2011-11-18 19:37 ` David Daney [this message]
2011-11-18 19:37 ` [PATCH RFC 3/5] kbuild/extable: Hook up sortextable into the build system David Daney
2011-11-20 13:45 ` Michal Marek
2011-11-22 21:38 ` David Daney
2011-11-18 19:37 ` [PATCH RFC 4/5] MIPS: Select BUILDTIME_EXTABLE_SORT David Daney
2011-11-18 19:37 ` [PATCH RFC 5/5] x86: " David Daney
2011-11-20 23:10 ` [PATCH RFC 0/5] Speed booting by sorting exception tables at build time Mike Frysinger
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