From 4009819cf90c26e3ec7b0ed949d5ff37c568e197 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Wed, 3 Mar 2010 17:03:21 +0100 Subject: microblaze: Remove memset in free_init_pages We don't need to do it. Signed-off-by: Michal Simek --- arch/microblaze/mm/init.c | 1 - 1 file changed, 1 deletion(-) (limited to 'arch/microblaze/mm') diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c index 1608e2e1a44..45b4bce606b 100644 --- a/arch/microblaze/mm/init.c +++ b/arch/microblaze/mm/init.c @@ -165,7 +165,6 @@ void free_init_pages(char *what, unsigned long begin, unsigned long end) for (addr = begin; addr < end; addr += PAGE_SIZE) { ClearPageReserved(virt_to_page(addr)); init_page_count(virt_to_page(addr)); - memset((void *)addr, 0xcc, PAGE_SIZE); free_page(addr); totalram_pages++; } -- cgit v1.2.3-70-g09d2 From 60a729f7bb936a9ab82b430de70a1952f560adf3 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Fri, 5 Mar 2010 15:49:53 +0100 Subject: microblaze: move noMMU __range_ok function to uaccess.h The same noMMU and MMU functions should be placed in one file. Signed-off-by: Michal Simek --- arch/microblaze/include/asm/uaccess.h | 7 ++++++- arch/microblaze/mm/init.c | 8 -------- 2 files changed, 6 insertions(+), 9 deletions(-) (limited to 'arch/microblaze/mm') diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h index e2adad33950..ce5defb259a 100644 --- a/arch/microblaze/include/asm/uaccess.h +++ b/arch/microblaze/include/asm/uaccess.h @@ -75,7 +75,12 @@ struct exception_table_entry { #ifndef CONFIG_MMU -extern int ___range_ok(unsigned long addr, unsigned long size); +/* Check against bounds of physical memory */ +static inline int ___range_ok(unsigned long addr, unsigned long size) +{ + return ((addr < memory_start) || + ((addr + size) > memory_end)); +} #define __range_ok(addr, size) \ ___range_ok((unsigned long)(addr), (unsigned long)(size)) diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c index 45b4bce606b..40bc10ede09 100644 --- a/arch/microblaze/mm/init.c +++ b/arch/microblaze/mm/init.c @@ -207,14 +207,6 @@ void __init mem_init(void) } #ifndef CONFIG_MMU -/* Check against bounds of physical memory */ -int ___range_ok(unsigned long addr, unsigned long size) -{ - return ((addr < memory_start) || - ((addr + size) > memory_end)); -} -EXPORT_SYMBOL(___range_ok); - int page_is_ram(unsigned long pfn) { return __range_ok(pfn, 0); -- cgit v1.2.3-70-g09d2 From 78ebfa884bcef125464399f8d1cb05937bfeb6e1 Mon Sep 17 00:00:00 2001 From: Michal Simek Date: Tue, 23 Mar 2010 15:37:02 +0100 Subject: microblaze: Adding likely macros On the base on GCOV analytics is helpful to add likely/unlikely macros. Signed-off-by: Michal Simek --- arch/microblaze/kernel/dma.c | 2 +- arch/microblaze/kernel/process.c | 9 +++++---- arch/microblaze/lib/memcpy.c | 2 +- arch/microblaze/lib/memset.c | 15 ++++++++------- arch/microblaze/mm/fault.c | 24 ++++++++++++------------ arch/microblaze/mm/pgtable.c | 2 +- 6 files changed, 28 insertions(+), 26 deletions(-) (limited to 'arch/microblaze/mm') diff --git a/arch/microblaze/kernel/dma.c b/arch/microblaze/kernel/dma.c index b1084974fcc..4d5b0311601 100644 --- a/arch/microblaze/kernel/dma.c +++ b/arch/microblaze/kernel/dma.c @@ -37,7 +37,7 @@ static inline void __dma_sync_page(unsigned long paddr, unsigned long offset, static unsigned long get_dma_direct_offset(struct device *dev) { - if (dev) + if (likely(dev)) return (unsigned long)dev->archdata.dma_data; return PCI_DRAM_OFFSET; /* FIXME Not sure if is correct */ diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c index 35efb2f42d5..09bed44dfcd 100644 --- a/arch/microblaze/kernel/process.c +++ b/arch/microblaze/kernel/process.c @@ -75,7 +75,10 @@ __setup("hlt", hlt_setup); void default_idle(void) { - if (!hlt_counter) { + if (likely(hlt_counter)) { + while (!need_resched()) + cpu_relax(); + } else { clear_thread_flag(TIF_POLLING_NRFLAG); smp_mb__after_clear_bit(); local_irq_disable(); @@ -83,9 +86,7 @@ void default_idle(void) cpu_sleep(); local_irq_enable(); set_thread_flag(TIF_POLLING_NRFLAG); - } else - while (!need_resched()) - cpu_relax(); + } } void cpu_idle(void) diff --git a/arch/microblaze/lib/memcpy.c b/arch/microblaze/lib/memcpy.c index cc2108b6b26..014bac92bdf 100644 --- a/arch/microblaze/lib/memcpy.c +++ b/arch/microblaze/lib/memcpy.c @@ -53,7 +53,7 @@ void *memcpy(void *v_dst, const void *v_src, __kernel_size_t c) const uint32_t *i_src; uint32_t *i_dst; - if (c >= 4) { + if (likely(c >= 4)) { unsigned value, buf_hold; /* Align the dstination to a word boundry. */ diff --git a/arch/microblaze/lib/memset.c b/arch/microblaze/lib/memset.c index 4df851d41a2..ecfb663e1fc 100644 --- a/arch/microblaze/lib/memset.c +++ b/arch/microblaze/lib/memset.c @@ -33,22 +33,23 @@ #ifdef __HAVE_ARCH_MEMSET void *memset(void *v_src, int c, __kernel_size_t n) { - char *src = v_src; #ifdef CONFIG_OPT_LIB_FUNCTION uint32_t *i_src; - uint32_t w32; + uint32_t w32 = 0; #endif /* Truncate c to 8 bits */ c = (c & 0xFF); #ifdef CONFIG_OPT_LIB_FUNCTION - /* Make a repeating word out of it */ - w32 = c; - w32 |= w32 << 8; - w32 |= w32 << 16; + if (unlikely(c)) { + /* Make a repeating word out of it */ + w32 = c; + w32 |= w32 << 8; + w32 |= w32 << 16; + } - if (n >= 4) { + if (likely(n >= 4)) { /* Align the destination to a word boundary */ /* This is done in an endian independant manner */ switch ((unsigned) src & 3) { diff --git a/arch/microblaze/mm/fault.c b/arch/microblaze/mm/fault.c index d9d249a66ff..7af87f4b2c2 100644 --- a/arch/microblaze/mm/fault.c +++ b/arch/microblaze/mm/fault.c @@ -106,7 +106,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address, regs->esr = error_code; /* On a kernel SLB miss we can only check for a valid exception entry */ - if (kernel_mode(regs) && (address >= TASK_SIZE)) { + if (unlikely(kernel_mode(regs) && (address >= TASK_SIZE))) { printk(KERN_WARNING "kernel task_size exceed"); _exception(SIGSEGV, regs, code, address); } @@ -122,7 +122,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address, } #endif /* CONFIG_KGDB */ - if (in_atomic() || !mm) { + if (unlikely(in_atomic() || !mm)) { if (kernel_mode(regs)) goto bad_area_nosemaphore; @@ -150,7 +150,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address, * source. If this is invalid we can skip the address space check, * thus avoiding the deadlock. */ - if (!down_read_trylock(&mm->mmap_sem)) { + if (unlikely(!down_read_trylock(&mm->mmap_sem))) { if (kernel_mode(regs) && !search_exception_tables(regs->pc)) goto bad_area_nosemaphore; @@ -158,16 +158,16 @@ void do_page_fault(struct pt_regs *regs, unsigned long address, } vma = find_vma(mm, address); - if (!vma) + if (unlikely(!vma)) goto bad_area; if (vma->vm_start <= address) goto good_area; - if (!(vma->vm_flags & VM_GROWSDOWN)) + if (unlikely(!(vma->vm_flags & VM_GROWSDOWN))) goto bad_area; - if (!is_write) + if (unlikely(!is_write)) goto bad_area; /* @@ -179,7 +179,7 @@ void do_page_fault(struct pt_regs *regs, unsigned long address, * before setting the user r1. Thus we allow the stack to * expand to 1MB without further checks. */ - if (address + 0x100000 < vma->vm_end) { + if (unlikely(address + 0x100000 < vma->vm_end)) { /* get user regs even if this fault is in kernel mode */ struct pt_regs *uregs = current->thread.regs; @@ -209,15 +209,15 @@ good_area: code = SEGV_ACCERR; /* a write */ - if (is_write) { - if (!(vma->vm_flags & VM_WRITE)) + if (unlikely(is_write)) { + if (unlikely(!(vma->vm_flags & VM_WRITE))) goto bad_area; /* a read */ } else { /* protection fault */ - if (error_code & 0x08000000) + if (unlikely(error_code & 0x08000000)) goto bad_area; - if (!(vma->vm_flags & (VM_READ | VM_EXEC))) + if (unlikely(!(vma->vm_flags & (VM_READ | VM_EXEC)))) goto bad_area; } @@ -235,7 +235,7 @@ survive: goto do_sigbus; BUG(); } - if (fault & VM_FAULT_MAJOR) + if (unlikely(fault & VM_FAULT_MAJOR)) current->maj_flt++; else current->min_flt++; diff --git a/arch/microblaze/mm/pgtable.c b/arch/microblaze/mm/pgtable.c index 63a6fd07c48..d31312cde6e 100644 --- a/arch/microblaze/mm/pgtable.c +++ b/arch/microblaze/mm/pgtable.c @@ -154,7 +154,7 @@ int map_page(unsigned long va, phys_addr_t pa, int flags) err = 0; set_pte_at(&init_mm, va, pg, pfn_pte(pa >> PAGE_SHIFT, __pgprot(flags))); - if (mem_init_done) + if (unlikely(mem_init_done)) flush_HPTE(0, va, pmd_val(*pd)); /* flush_HPTE(0, va, pg); */ } -- cgit v1.2.3-70-g09d2