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| author |   Tony Luck <tony.luck@intel.com> | 2005-06-15 14:06:48 -0700 |
|---|---|---|
| committer | Tony Luck <tony.luck@intel.com> | 2005-06-15 14:06:48 -0700 |
| commit | f2cbb4f01936a3e4225692e03b084b78c56d386d (patch) | |
| tree | f89f3d8baa250589a38a4dd2df56f84cddae3c76 /arch/ia64/mm/init.c | |
| parent | Merge with temp tree to get David's gdb inferior calls patch (diff) | |
| parent | [PATCH] update ppc64 defconfig (diff) | |
| download | linux-dev-f2cbb4f01936a3e4225692e03b084b78c56d386d.tar.xz linux-dev-f2cbb4f01936a3e4225692e03b084b78c56d386d.zip | |
Auto merge with /home/aegl/GIT/linus
Diffstat (limited to 'arch/ia64/mm/init.c')
| -rw-r--r-- | arch/ia64/mm/init.c | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/arch/ia64/mm/init.c b/arch/ia64/mm/init.c index 547785e3cba2..4eb2f52b87a1 100644 --- a/arch/ia64/mm/init.c +++ b/arch/ia64/mm/init.c @@ -305,8 +305,9 @@ setup_gate (void) struct page *page; /* - * Map the gate page twice: once read-only to export the ELF headers etc. and once - * execute-only page to enable privilege-promotion via "epc": + * Map the gate page twice: once read-only to export the ELF + * headers etc. and once execute-only page to enable + * privilege-promotion via "epc": */ page = virt_to_page(ia64_imva(__start_gate_section)); put_kernel_page(page, GATE_ADDR, PAGE_READONLY); @@ -315,6 +316,20 @@ setup_gate (void) put_kernel_page(page, GATE_ADDR + PAGE_SIZE, PAGE_GATE); #else put_kernel_page(page, GATE_ADDR + PERCPU_PAGE_SIZE, PAGE_GATE); + /* Fill in the holes (if any) with read-only zero pages: */ + { + unsigned long addr; + + for (addr = GATE_ADDR + PAGE_SIZE; + addr < GATE_ADDR + PERCPU_PAGE_SIZE; + addr += PAGE_SIZE) + { + put_kernel_page(ZERO_PAGE(0), addr, + PAGE_READONLY); + put_kernel_page(ZERO_PAGE(0), addr + PERCPU_PAGE_SIZE, + PAGE_READONLY); + } + } #endif ia64_patch_gate(); } |