From mboxrd@z Thu Jan 1 00:00:00 1970 From: anton.vorontsov@linaro.org (Anton Vorontsov) Date: Mon, 30 Jul 2012 04:58:20 -0700 Subject: [PATCH 11/11] ARM: Get rid of .LCcralign local label usage in alignment_trap macro In-Reply-To: <20120730115719.GA5742@lizard> References: <20120730115719.GA5742@lizard> Message-ID: <1343649500-18491-11-git-send-email-anton.vorontsov@linaro.org> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org This makes the code more izolated. The downside of this is that we now have an additional branch and the code itself is 8 bytes longer. But on the bright side, this new layout can be more cache friendly since cr_alignment address might be already in the cache line (not that I measured anything, it's just fun to think about it). Signed-off-by: Anton Vorontsov --- arch/arm/kernel/entry-armv.S | 2 -- arch/arm/kernel/entry-header.S | 6 +++++- arch/arm/kernel/kgdb_fiq_entry.S | 3 --- 3 files changed, 5 insertions(+), 6 deletions(-) diff --git a/arch/arm/kernel/entry-armv.S b/arch/arm/kernel/entry-armv.S index 6aeb9b8..6b04ab5 100644 --- a/arch/arm/kernel/entry-armv.S +++ b/arch/arm/kernel/entry-armv.S @@ -266,8 +266,6 @@ __pabt_svc: ENDPROC(__pabt_svc) .align 5 -.LCcralign: - .word cr_alignment #ifdef MULTI_DABORT .LCprocfns: .word processor diff --git a/arch/arm/kernel/entry-header.S b/arch/arm/kernel/entry-header.S index c3c09ac..5a05e7f 100644 --- a/arch/arm/kernel/entry-header.S +++ b/arch/arm/kernel/entry-header.S @@ -38,9 +38,13 @@ .macro alignment_trap, rtemp #ifdef CONFIG_ALIGNMENT_TRAP - ldr \rtemp, .LCcralign + ldr \rtemp, 1f ldr \rtemp, [\rtemp] mcr p15, 0, \rtemp, c1, c0 + b 2f +1: + .word cr_alignment +2: #endif .endm diff --git a/arch/arm/kernel/kgdb_fiq_entry.S b/arch/arm/kernel/kgdb_fiq_entry.S index 7be3726..e7c05fc 100644 --- a/arch/arm/kernel/kgdb_fiq_entry.S +++ b/arch/arm/kernel/kgdb_fiq_entry.S @@ -18,9 +18,6 @@ .text -@ This is needed for usr_entry/alignment_trap -.LCcralign: - .long cr_alignment .LCdohandle: .long kgdb_fiq_do_handle -- 1.7.10.4