5 files changed, 50 insertions, 20 deletions

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index f41c9538ca30..237fc128143d 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -66,9 +66,6 @@ config MMU
 config ZONE_DMA
         def_bool y
 
-config QUICKLIST
-        def_bool X86_32
-
 config SBUS
         bool
 
diff --git a/arch/x86/kernel/ptrace.c b/arch/x86/kernel/ptrace.c
index 8f64abe699fd..d5904eef1d31 100644
--- a/arch/x86/kernel/ptrace.c
+++ b/arch/x86/kernel/ptrace.c
@@ -1055,10 +1055,17 @@ static int putreg32(struct task_struct *child, unsigned regno, u32 value)
         R32(esi, si);
         R32(ebp, bp);
         R32(eax, ax);
-        R32(orig_eax, orig_ax);
         R32(eip, ip);
         R32(esp, sp);
 
+        case offsetof(struct user32, regs.orig_eax):
+                /*
+                 * Sign-extend the value so that orig_eax = -1
+                 * causes (long)orig_ax < 0 tests to fire correctly.
+                 */
+                regs->orig_ax = (long) (s32) value;
+                break;
+
         case offsetof(struct user32, regs.eflags):
                 return set_flags(child, value);
 
diff --git a/arch/x86/kernel/signal_64.c b/arch/x86/kernel/signal_64.c
index 56b72fb67f9b..1c83e5124c65 100644
--- a/arch/x86/kernel/signal_64.c
+++ b/arch/x86/kernel/signal_64.c
@@ -311,6 +311,35 @@ give_sigsegv:
 }
 
 /*
+ * Return -1L or the syscall number that @regs is executing.
+ */
+static long current_syscall(struct pt_regs *regs)
+{
+        /*
+         * We always sign-extend a -1 value being set here,
+         * so this is always either -1L or a syscall number.
+         */
+        return regs->orig_ax;
+}
+
+/*
+ * Return a value that is -EFOO if the system call in @regs->orig_ax
+ * returned an error.  This only works for @regs from @current.
+ */
+static long current_syscall_ret(struct pt_regs *regs)
+{
+#ifdef CONFIG_IA32_EMULATION
+        if (test_thread_flag(TIF_IA32))
+                /*
+                 * Sign-extend the value so (int)-EFOO becomes (long)-EFOO
+                 * and will match correctly in comparisons.
+                 */
+                return (int) regs->ax;
+#endif
+        return regs->ax;
+}
+
+/*
  * OK, we're invoking a handler
  */     
 
@@ -327,9 +356,9 @@ handle_signal(unsigned long sig, siginfo_t *info, struct k_sigaction *ka,
 #endif
 
         /* Are we from a system call? */
-        if ((long)regs->orig_ax >= 0) {
+        if (current_syscall(regs) >= 0) {
                 /* If so, check system call restarting.. */
-                switch (regs->ax) {
+                switch (current_syscall_ret(regs)) {
                         case -ERESTART_RESTARTBLOCK:
                         case -ERESTARTNOHAND:
                                 regs->ax = -EINTR;
@@ -426,10 +455,9 @@ static void do_signal(struct pt_regs *regs)
         }
 
         /* Did we come from a system call? */
-        if ((long)regs->orig_ax >= 0) {
+        if (current_syscall(regs) >= 0) {
                 /* Restart the system call - no handlers present */
-                long res = regs->ax;
-                switch (res) {
+                switch (current_syscall_ret(regs)) {
                 case -ERESTARTNOHAND:
                 case -ERESTARTSYS:
                 case -ERESTARTNOINTR:
diff --git a/arch/x86/mm/ioremap.c b/arch/x86/mm/ioremap.c
index ac3c959e271d..8fe576baa148 100644
--- a/arch/x86/mm/ioremap.c
+++ b/arch/x86/mm/ioremap.c
@@ -134,8 +134,6 @@ static void __iomem *__ioremap(unsigned long phys_addr, unsigned long size,
                         return NULL;
         }
 
-        WARN_ON_ONCE(page_is_ram(pfn));
-
         switch (mode) {
         case IOR_MODE_UNCACHED:
         default:
diff --git a/arch/x86/mm/pgtable_32.c b/arch/x86/mm/pgtable_32.c
index 73aba7125203..2f9e9afcb9f4 100644
--- a/arch/x86/mm/pgtable_32.c
+++ b/arch/x86/mm/pgtable_32.c
@@ -342,12 +342,16 @@ static void pgd_mop_up_pmds(struct mm_struct *mm, pgd_t *pgdp)
 
 pgd_t *pgd_alloc(struct mm_struct *mm)
 {
-        pgd_t *pgd = quicklist_alloc(0, GFP_KERNEL, pgd_ctor);
+        pgd_t *pgd = (pgd_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
 
-        mm->pgd = pgd;          /* so that alloc_pd can use it */
+        /* so that alloc_pd can use it */
+        mm->pgd = pgd;
+        if (pgd)
+                pgd_ctor(pgd);
 
         if (pgd && !pgd_prepopulate_pmd(mm, pgd)) {
-                quicklist_free(0, pgd_dtor, pgd);
+                pgd_dtor(pgd);
+                free_page((unsigned long)pgd);
                 pgd = NULL;
         }
 
@@ -357,12 +361,8 @@ pgd_t *pgd_alloc(struct mm_struct *mm)
 void pgd_free(struct mm_struct *mm, pgd_t *pgd)
 {
         pgd_mop_up_pmds(mm, pgd);
-        quicklist_free(0, pgd_dtor, pgd);
-}
-
-void check_pgt_cache(void)
-{
-        quicklist_trim(0, pgd_dtor, 25, 16);
+        pgd_dtor(pgd);
+        free_page((unsigned long)pgd);
 }
 
 void __pte_free_tlb(struct mmu_gather *tlb, struct page *pte)