From: Wenzeng Chen <w...@marvell.com> In cpu suspend function __cpu_suspend_save(), we save cp15 registers, resume function, sp and suspend_pgd, then flush the data to DDR, but no need to flush all D cache, only need to flush range.
Change-Id: I591a1fde929f3f987c69306b601843ed975d3e41 Signed-off-by: Wenzeng Chen <w...@marvell.com> --- arch/arm/kernel/suspend.c | 4 +++- 1 files changed, 3 insertions(+), 1 deletions(-) diff --git a/arch/arm/kernel/suspend.c b/arch/arm/kernel/suspend.c index 1794cc3..bb582d8 100644 --- a/arch/arm/kernel/suspend.c +++ b/arch/arm/kernel/suspend.c @@ -17,6 +17,7 @@ extern void cpu_resume_mmu(void); */ void __cpu_suspend_save(u32 *ptr, u32 ptrsz, u32 sp, u32 *save_ptr) { + u32 *ptr_orig = ptr; *save_ptr = virt_to_phys(ptr); /* This must correspond to the LDM in cpu_resume() assembly */ @@ -26,7 +27,8 @@ void __cpu_suspend_save(u32 *ptr, u32 ptrsz, u32 sp, u32 *save_ptr) cpu_do_suspend(ptr); - flush_cache_all(); + __cpuc_flush_dcache_area((void *)ptr_orig, ptrsz); + __cpuc_flush_dcache_area((void *)save_ptr, sizeof(*save_ptr)); outer_clean_range(*save_ptr, *save_ptr + ptrsz); outer_clean_range(virt_to_phys(save_ptr), virt_to_phys(save_ptr) + sizeof(*save_ptr)); -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/