x86: clean up arch/x86/mm/pageattr-test.c
[sfrench/cifs-2.6.git] / arch / x86 / mm / pageattr-test.c
index 4b22eb47f23a1d116e2e457ae50a30d000e5c2b3..c58fab0617629057b02c7b3ef0049bd14d5cdb0f 100644 (file)
@@ -4,36 +4,36 @@
  * Clears the global bit on random pages in the direct mapping, then reverts
  * and compares page tables forwards and afterwards.
  */
-
-#include <linux/mm.h>
+#include <linux/bootmem.h>
 #include <linux/random.h>
 #include <linux/kernel.h>
 #include <linux/init.h>
-#include <linux/bootmem.h>
+#include <linux/mm.h>
+
 #include <asm/cacheflush.h>
 #include <asm/pgtable.h>
 #include <asm/kdebug.h>
 
 enum {
-       NTEST = 400,
+       NTEST                   = 400,
 #ifdef CONFIG_X86_64
-       LOWEST_LEVEL = 4,
-       LPS = (1 << PMD_SHIFT),
+       LOWEST_LEVEL            = 4,
+       LPS                     = (1 << PMD_SHIFT),
 #elif defined(CONFIG_X86_PAE)
-       LOWEST_LEVEL = 3,
-       LPS = (1 << PMD_SHIFT),
+       LOWEST_LEVEL            = 3,
+       LPS                     = (1 << PMD_SHIFT),
 #else
-       LOWEST_LEVEL = 3, /* lookup_address lies here */
-       LPS = (1 << 22),
+       LOWEST_LEVEL            = 3, /* lookup_address lies here */
+       LPS                     = (1 << 22),
 #endif
-       GPS = (1<<30)
+       GPS                     = (1<<30)
 };
 
 #ifdef CONFIG_X86_64
-#include <asm/proto.h>
-#define max_mapped end_pfn_map
+# include <asm/proto.h>
+# define max_mapped            end_pfn_map
 #else
-#define max_mapped max_low_pfn
+# define max_mapped            max_low_pfn
 #endif
 
 struct split_state {
@@ -43,23 +43,24 @@ struct split_state {
 
 static __init int print_split(struct split_state *s)
 {
-       int printed = 0;
        long i, expected, missed = 0;
+       int printed = 0;
        int err = 0;
 
        s->lpg = s->gpg = s->spg = s->exec = 0;
        s->min_exec = ~0UL;
        s->max_exec = 0;
        for (i = 0; i < max_mapped; ) {
+               unsigned long addr = (unsigned long)__va(i << PAGE_SHIFT);
                int level;
                pte_t *pte;
-               unsigned long adr = (unsigned long)__va(i << PAGE_SHIFT);
 
-               pte = lookup_address(adr, &level);
+               pte = lookup_address(addr, &level);
                if (!pte) {
                        if (!printed) {
-                               dump_pagetable(adr);
-                               printk("CPA %lx no pte level %d\n", adr, level);
+                               dump_pagetable(addr);
+                               printk(KERN_INFO "CPA %lx no pte level %d\n",
+                                       addr, level);
                                printed = 1;
                        }
                        missed++;
@@ -72,8 +73,9 @@ static __init int print_split(struct split_state *s)
                        i += GPS/PAGE_SIZE;
                } else if (level != LOWEST_LEVEL) {
                        if (!(pte_val(*pte) & _PAGE_PSE)) {
-                               printk("%lx level %d but not PSE %Lx\n",
-                                       adr, level, (u64)pte_val(*pte));
+                               printk(KERN_ERR
+                                       "%lx level %d but not PSE %Lx\n",
+                                       addr, level, (u64)pte_val(*pte));
                                err = 1;
                        }
                        s->lpg++;
@@ -84,18 +86,20 @@ static __init int print_split(struct split_state *s)
                }
                if (!(pte_val(*pte) & _PAGE_NX)) {
                        s->exec++;
-                       if (adr < s->min_exec)
-                               s->min_exec = adr;
-                       if (adr > s->max_exec)
-                               s->max_exec = adr;
+                       if (addr < s->min_exec)
+                               s->min_exec = addr;
+                       if (addr > s->max_exec)
+                               s->max_exec = addr;
                }
        }
-       printk("CPA mapping 4k %lu large %lu gb %lu x %lu[%lx-%lx] miss %lu\n",
+       printk(KERN_INFO
+               "CPA mapping 4k %lu large %lu gb %lu x %lu[%lx-%lx] miss %lu\n",
                s->spg, s->lpg, s->gpg, s->exec,
                s->min_exec != ~0UL ? s->min_exec : 0, s->max_exec, missed);
+
        expected = (s->gpg*GPS + s->lpg*LPS)/PAGE_SIZE + s->spg + missed;
        if (expected != i) {
-               printk("CPA max_mapped %lu but expected %lu\n",
+               printk(KERN_ERR "CPA max_mapped %lu but expected %lu\n",
                        max_mapped, expected);
                return 1;
        }
@@ -105,56 +109,62 @@ static __init int print_split(struct split_state *s)
 static __init int state_same(struct split_state *a, struct split_state *b)
 {
        return a->lpg == b->lpg && a->gpg == b->gpg && a->spg == b->spg &&
-                       a->exec == b->exec;
+               a->exec == b->exec;
 }
 
-static unsigned long addr[NTEST] __initdata;
-static unsigned len[NTEST] __initdata;
+static unsigned long __initdata addr[NTEST];
+static unsigned int __initdata len[NTEST];
 
 /* Change the global bit on random pages in the direct mapping */
 static __init int exercise_pageattr(void)
 {
-       int i, k;
+       struct split_state sa, sb, sc;
+       unsigned long *bm;
        pte_t *pte, pte0;
+       int failed = 0;
        int level;
+       int i, k;
        int err;
-       struct split_state sa, sb, sc;
-       int failed = 0;
-       unsigned long *bm;
 
-       printk("CPA exercising pageattr\n");
+       printk(KERN_INFO "CPA exercising pageattr\n");
 
        bm = vmalloc((max_mapped + 7) / 8);
        if (!bm) {
-               printk("CPA Cannot vmalloc bitmap\n");
+               printk(KERN_ERR "CPA Cannot vmalloc bitmap\n");
                return -ENOMEM;
        }
        memset(bm, 0, (max_mapped + 7) / 8);
 
        failed += print_split(&sa);
        srandom32(100);
+
        for (i = 0; i < NTEST; i++) {
                unsigned long pfn = random32() % max_mapped;
+
                addr[i] = (unsigned long)__va(pfn << PAGE_SHIFT);
                len[i] = random32() % 100;
                len[i] = min_t(unsigned long, len[i], max_mapped - pfn - 1);
+
                if (len[i] == 0)
                        len[i] = 1;
 
                pte = NULL;
                pte0 = pfn_pte(0, __pgprot(0)); /* shut gcc up */
+
                for (k = 0; k < len[i]; k++) {
                        pte = lookup_address(addr[i] + k*PAGE_SIZE, &level);
                        if (!pte || pgprot_val(pte_pgprot(*pte)) == 0) {
                                addr[i] = 0;
                                break;
                        }
-                       if (k == 0)
+                       if (k == 0) {
                                pte0 = *pte;
-                       else if (pgprot_val(pte_pgprot(*pte)) !=
+                       } else {
+                               if (pgprot_val(pte_pgprot(*pte)) !=
                                        pgprot_val(pte_pgprot(pte0))) {
-                               len[i] = k;
-                               break;
+                                       len[i] = k;
+                                       break;
+                               }
                        }
                        if (test_bit(pfn + k, bm)) {
                                len[i] = k;
@@ -170,19 +180,19 @@ static __init int exercise_pageattr(void)
                err = change_page_attr(virt_to_page(addr[i]), len[i],
                            pte_pgprot(pte_clrhuge(pte_clrglobal(pte0))));
                if (err < 0) {
-                       printk("CPA %d failed %d\n", i, err);
+                       printk(KERN_ERR "CPA %d failed %d\n", i, err);
                        failed++;
                }
 
                pte = lookup_address(addr[i], &level);
                if (!pte || pte_global(*pte) || pte_huge(*pte)) {
-                       printk("CPA %lx: bad pte %Lx\n", addr[i],
+                       printk(KERN_ERR "CPA %lx: bad pte %Lx\n", addr[i],
                                pte ? (u64)pte_val(*pte) : 0ULL);
                        failed++;
                }
                if (level != LOWEST_LEVEL) {
-                       printk("CPA %lx: unexpected level %d\n", addr[i],
-                                       level);
+                       printk(KERN_ERR "CPA %lx: unexpected level %d\n",
+                               addr[i], level);
                        failed++;
                }
 
@@ -192,26 +202,26 @@ static __init int exercise_pageattr(void)
 
        failed += print_split(&sb);
 
-       printk("CPA reverting everything\n");
+       printk(KERN_INFO "CPA reverting everything\n");
        for (i = 0; i < NTEST; i++) {
                if (!addr[i])
                        continue;
                pte = lookup_address(addr[i], &level);
                if (!pte) {
-                       printk("CPA lookup of %lx failed\n", addr[i]);
+                       printk(KERN_ERR "CPA lookup of %lx failed\n", addr[i]);
                        failed++;
                        continue;
                }
                err = change_page_attr(virt_to_page(addr[i]), len[i],
                                          pte_pgprot(pte_mkglobal(*pte)));
                if (err < 0) {
-                       printk("CPA reverting failed: %d\n", err);
+                       printk(KERN_ERR "CPA reverting failed: %d\n", err);
                        failed++;
                }
                pte = lookup_address(addr[i], &level);
                if (!pte || !pte_global(*pte)) {
-                       printk("CPA %lx: bad pte after revert %Lx\n", addr[i],
-                              pte ? (u64)pte_val(*pte) : 0ULL);
+                       printk(KERN_ERR "CPA %lx: bad pte after revert %Lx\n",
+                               addr[i], pte ? (u64)pte_val(*pte) : 0ULL);
                        failed++;
                }
 
@@ -223,11 +233,10 @@ static __init int exercise_pageattr(void)
                failed++;
 
        if (failed)
-               printk("CPA selftests NOT PASSED. Please report.\n");
+               printk(KERN_ERR "CPA selftests NOT PASSED. Please report.\n");
        else
-               printk("CPA selftests PASSED\n");
+               printk(KERN_INFO "CPA selftests PASSED\n");
 
        return 0;
 }
-
 module_init(exercise_pageattr);