Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc

* 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/paulus/powerpc: (24 commits)
  [POWERPC] Convert the cell IOMMU fixed mapping to 16M IOMMU pages
  [POWERPC] Allow for different IOMMU page sizes in cell IOMMU code
  [POWERPC] Cell IOMMU: n_pte_pages is in 4K page units, not IOMMU_PAGE_SIZE
  [POWERPC] Split setup of IOMMU stab and ptab, allocate dynamic/fixed ptabs separately
  [POWERPC] Move allocation of cell IOMMU pad page
  [POWERPC] Remove unused pte_offset variable
  [POWERPC] Use it_offset not pte_offset in cell IOMMU code
  [POWERPC] Clearup cell IOMMU fixed mapping terminology
  [POWERPC] enable hardware watchpoints on cell blades
  [POWERPC] move celleb DABRX definitions
  [POWERPC] OProfile: enable callgraph support for Cell
  [POWERPC] spufs: fix use time accounting on SPE-overcommit
  [POWERPC] spufs: serialize SLB invalidation against SLB loading
  [POWERPC] spufs: invalidate SLB translation before adding a new entry
  [POWERPC] spufs: synchronize IRQ when disabling
  [POWERPC] spufs: fix order of sputrace thread IDs
  [POWERPC] Xilinx: hwicap cleanup
  [POWERPC] 4xx: Use correct board info structure in cuboot wrappers
  [POWERPC] spufs: fix invalid scheduling of forgotten contexts
  [POWERPC] 44x: add missing define TARGET_4xx and TARGET_440GX to cuboot-taishan
  ...

diff --git a/fs/exec.c b/fs/exec.c
index a44b142fb4607baee2d832b1056103b5d157e5a7..54a0a557b6781ecf379015bbd60dc6f3fd37c176 100644 (file)
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -173,8 +173,15 @@ static struct page *get_arg_page(struct linux_binprm *bprm, unsigned long pos,
                return NULL;
 
        if (write) {
-               struct rlimit *rlim = current->signal->rlim;
                unsigned long size = bprm->vma->vm_end - bprm->vma->vm_start;
+               struct rlimit *rlim;
+
+               /*
+                * We've historically supported up to 32 pages (ARG_MAX)
+                * of argument strings even with small stacks
+                */
+               if (size <= ARG_MAX)
+                       return page;
 
                /*
                 * Limit to 1/4-th the stack size for the argv+env strings.
@@ -183,6 +190,7 @@ static struct page *get_arg_page(struct linux_binprm *bprm, unsigned long pos,
                 *  - the program will have a reasonable amount of stack left
                 *    to work from.
                 */
+               rlim = current->signal->rlim;
                if (size > rlim[RLIMIT_STACK].rlim_cur / 4) {
                        put_page(page);
                        return NULL;

diff --git a/include/asm-x86/pgtable_32.h b/include/asm-x86/pgtable_32.h
index b478efa971e0e80ef27cc7fff3bff4aefdd410ce..a842c7222b1eef0f598a8de4a4c5375506e0b2c5 100644 (file)
--- a/include/asm-x86/pgtable_32.h
+++ b/include/asm-x86/pgtable_32.h
@@ -91,9 +91,7 @@ extern unsigned long pg0[];
 /* To avoid harmful races, pmd_none(x) should check only the lower when PAE */
 #define pmd_none(x)    (!(unsigned long)pmd_val(x))
 #define pmd_present(x) (pmd_val(x) & _PAGE_PRESENT)
-#define        pmd_bad(x)      ((pmd_val(x) \
-                         & ~(PAGE_MASK | _PAGE_USER | _PAGE_PSE | _PAGE_NX)) \
-                        != _KERNPG_TABLE)
+#define        pmd_bad(x)      ((pmd_val(x) & (~PAGE_MASK & ~_PAGE_USER)) != _KERNPG_TABLE)
 
 
 #define pages_to_mb(x) ((x) >> (20-PAGE_SHIFT))

diff --git a/include/asm-x86/pgtable_64.h b/include/asm-x86/pgtable_64.h
index 0a9258333cbd013ab05b5154375054aab61d6fe0..0a0b77bc736a82171beb2f50d39df7a6e2aae947 100644 (file)
--- a/include/asm-x86/pgtable_64.h
+++ b/include/asm-x86/pgtable_64.h
@@ -153,14 +153,12 @@ static inline unsigned long pgd_bad(pgd_t pgd)
 
 static inline unsigned long pud_bad(pud_t pud)
 {
-       return pud_val(pud) &
-               ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER | _PAGE_PSE | _PAGE_NX);
+       return pud_val(pud) & ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER);
 }
 
 static inline unsigned long pmd_bad(pmd_t pmd)
 {
-       return pmd_val(pmd) &
-               ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER | _PAGE_PSE | _PAGE_NX);
+       return pmd_val(pmd) & ~(PTE_MASK | _KERNPG_TABLE | _PAGE_USER);
 }
 
 #define pte_none(x)    (!pte_val(x))