From 01c7c52c66428c45484b59dac950b613e38cc7dc Mon Sep 17 00:00:00 2001 From: Tony Lindgren Date: Thu, 14 Jan 2016 12:20:47 -0800 Subject: [PATCH] ARM: OMAP2+: Fix wait_dll_lock_timed for rodata [ Upstream commit d9db59103305eb5ec2a86369f32063e9921b6ac5 ] We don't want to be writing to .text so it can be set rodata. Fix error "Unable to handle kernel paging request at virtual address c012396c" in wait_dll_lock_timed if CONFIG_DEBUG_RODATA is selected. As these counters are for debugging only and unused, we can just remove them. Cc: Kees Cook Cc: Laura Abbott Cc: Nishanth Menon Cc: Richard Woodruff Cc: Russell King Cc: Tero Kristo Acked-by: Nicolas Pitre Cc: stable@vger.kernel.org # v4.0+ Fixes: 1e6b48116a95 ("ARM: mm: allow non-text sections to be non-executable") Signed-off-by: Tony Lindgren Signed-off-by: Sasha Levin --- arch/arm/mach-omap2/sleep34xx.S | 22 ---------------------- 1 file changed, 22 deletions(-) diff --git a/arch/arm/mach-omap2/sleep34xx.S b/arch/arm/mach-omap2/sleep34xx.S index eafd120b53f1b..787cfda7a9b3e 100644 --- a/arch/arm/mach-omap2/sleep34xx.S +++ b/arch/arm/mach-omap2/sleep34xx.S @@ -289,12 +289,6 @@ wait_sdrc_ready: bic r5, r5, #0x40 str r5, [r4] -/* - * PC-relative stores lead to undefined behaviour in Thumb-2: use a r7 as a - * base instead. - * Be careful not to clobber r7 when maintaing this code. - */ - is_dll_in_lock_mode: /* Is dll in lock mode? */ ldr r4, sdrc_dlla_ctrl @@ -302,11 +296,7 @@ is_dll_in_lock_mode: tst r5, #0x4 bne exit_nonoff_modes @ Return if locked /* wait till dll locks */ - adr r7, kick_counter wait_dll_lock_timed: - ldr r4, wait_dll_lock_counter - add r4, r4, #1 - str r4, [r7, #wait_dll_lock_counter - kick_counter] ldr r4, sdrc_dlla_status /* Wait 20uS for lock */ mov r6, #8 @@ -330,9 +320,6 @@ kick_dll: orr r6, r6, #(1<<3) @ enable dll str r6, [r4] dsb - ldr r4, kick_counter - add r4, r4, #1 - str r4, [r7] @ kick_counter b wait_dll_lock_timed exit_nonoff_modes: @@ -360,15 +347,6 @@ sdrc_dlla_status: .word SDRC_DLLA_STATUS_V sdrc_dlla_ctrl: .word SDRC_DLLA_CTRL_V - /* - * When exporting to userspace while the counters are in SRAM, - * these 2 words need to be at the end to facilitate retrival! - */ -kick_counter: - .word 0 -wait_dll_lock_counter: - .word 0 - ENTRY(omap3_do_wfi_sz) .word . - omap3_do_wfi -- 2.47.3