-# Patch generated against a6047eef1c465c38aacfbdab193161b3f0cd144
----
-# Documentation/fb/vesafb.txt | 250 ++++--
-# arch/i386/boot/video.S | 12
-# drivers/video/Kconfig | 56 +
-# drivers/video/Makefile | 6
-# drivers/video/fbmem.c | 1
-# drivers/video/modedb.c | 1
-# drivers/video/vesafb-thread.c | 727 +++++++++++++++++++
-# drivers/video/vesafb-tng.c | 1598 ++++++++++++++++++++++++++++++++++++++++++
-# include/linux/sched.h | 2
-# include/video/vesa.h | 150 +++
-# kernel/fork.c | 35
-# mm/memory.c | 1
-# mm/mmap.c | 1
-# 13 files changed, 2748 insertions(+), 92 deletions(-)
-#
---- linux-2.6.17.orig/Documentation/fb/vesafb.txt
-+++ linux-2.6.17/Documentation/fb/vesafb.txt
+diff --git a/Documentation/fb/vesafb.txt b/Documentation/fb/vesafb.txt
+index ee277dd..93d6e6e 100644
+--- a/Documentation/fb/vesafb.txt
++++ b/Documentation/fb/vesafb.txt
@@ -2,16 +2,18 @@
What is vesafb?
===============
Linux_kernel_mode_number = VESA_mode_number + 0x200
-@@ -56,15 +67,15 @@ So the table for the Kernel mode numbers
+@@ -56,15 +67,15 @@ So the table for the Kernel mode numbers are:
| 640x480 800x600 1024x768 1280x1024
----+-------------------------------------
If this does not work, this might be because your BIOS does not support
linear framebuffers or because it does not support this mode at all.
-@@ -72,11 +83,12 @@ Even if your board does, it might be the
+@@ -72,11 +83,12 @@ Even if your board does, it might be the BIOS which does not. VESA BIOS
Extensions v2.0 are required, 1.2 is NOT sufficient. You will get a
"bad mode number" message if something goes wrong.
X11
===
-@@ -84,98 +96,164 @@ XF68_FBDev should work just fine, but it
+@@ -84,98 +96,164 @@ XF68_FBDev should work just fine, but it is non-accelerated. Running
another (accelerated) X-Server like XF86_SVGA might or might not work.
It depends on X-Server and graphics board.
+With VBE 3.0 compatible BIOSes and vesafb-tng it is possible to change
+the refresh rate either at boot time (by specifying the @<rr> part of
+the mode name) or later, using the fbset utility.
++
++If you want to use the default BIOS refresh rate while switching modes
++on a running system, set pixclock to 0.
- * configure and load the DOS-Tools for your the graphics board (if
- available) and boot linux with loadlin.
- * use a native driver (matroxfb/atyfb) instead if vesafb. If none
-+If you want to use the default BIOS refresh rate while switching modes
-+on a running system, set pixclock to 0.
-+
+With VBE 2.0 there is no way to change the mode timings after booting
+Linux. If you are not happy with the 60 Hz refresh rate, you have
+the following options:
-to pan the display. It is turned off by default because it
-seems not to work with some BIOS versions, but there are options
-to turn it on.
-+The VESA BIOS provides protected mode interface for changing some parameters.
-+vesafb can use it for palette changes and to pan the display. It is turned
-+off by default because it seems not to work with some BIOS versions, but
-+there are options to turn it on.
-
+-
-You can pass options to vesafb using "video=vesafb:option" on
-the kernel command line. Multiple options should be separated
-by comma, like this: "video=vesafb:ypan,invers"
-+You can pass options to vesafb using "video=vesafb:option" on the kernel
-+command line. Multiple options should be separated by a comma, like this:
-+"video=vesafb:ypan,1024x768-32@85"
-
+-
-Accepted options:
-+Note that vesafb-tng still uses the "video=vesafb:option" format of the
-+kernel command line video parameter. "video=vesafb-tng:xxx" is incorrect.
-
+-
-invers no comment...
-+Accepted options (both vesafb and vesafb-tng):
-
+-
-ypan enable display panning using the VESA protected mode
- interface. The visible screen is just a window of the
- video memory, console scrolling is done by changing the
- kontra: * scrolling only parts of the screen causes some
- ugly flicker effects (boot logo flickers for
- example).
+-
+-ywrap Same as ypan, but assumes your gfx board can wrap-around
+- the video memory (i.e. starts reading from top if it
+- reaches the end of video memory). Faster than ypan.
+-
+-redraw scroll by redrawing the affected part of the screen, this
+- is the safe (and slow) default.
+-
+-
+-vgapal Use the standard vga registers for palette changes.
+- This is the default.
+-pmipal Use the protected mode interface for palette changes.
+-
+-mtrr:n setup memory type range registers for the vesafb framebuffer
+- where n:
+- 0 - disabled (equivalent to nomtrr) (default)
+- 1 - uncachable
+- 2 - write-back
+- 3 - write-combining
+- 4 - write-through
+-
+- If you see the following in dmesg, choose the type that matches the
+- old one. In this example, use "mtrr:2".
++The VESA BIOS provides protected mode interface for changing some parameters.
++vesafb can use it for palette changes and to pan the display. It is turned
++off by default because it seems not to work with some BIOS versions, but
++there are options to turn it on.
++
++You can pass options to vesafb using "video=vesafb:option" on the kernel
++command line. Multiple options should be separated by a comma, like this:
++"video=vesafb:ypan,1024x768-32@85"
++
++Note that vesafb-tng still uses the "video=vesafb:option" format of the
++kernel command line video parameter. "video=vesafb-tng:xxx" is incorrect.
++
++Accepted options (both vesafb and vesafb-tng):
++
+ypan Enable display panning using the VESA protected mode interface
+ The visible screen is just a window of the video memory,
+ console scrolling is done by changing the start of the window.
+ con: * scrolling only parts of the screen causes some
+ ugly flicker effects (boot logo flickers for
+ example).
-
--ywrap Same as ypan, but assumes your gfx board can wrap-around
-- the video memory (i.e. starts reading from top if it
-- reaches the end of video memory). Faster than ypan.
++
+ywrap Same as ypan, but assumes your gfx board can wrap-around the video
+ memory (i.e. starts reading from top if it reaches the end of
+ video memory). Faster than ypan.
-
--redraw scroll by redrawing the affected part of the screen, this
-- is the safe (and slow) default.
++
+redraw Scroll by redrawing the affected part of the screen, this is the
+ safe (and slow) default.
-
++
+vgapal Use the standard VGA registers for palette changes.
-
--vgapal Use the standard vga registers for palette changes.
-- This is the default.
--pmipal Use the protected mode interface for palette changes.
++
+pmipal Use the protected mode interface for palette changes.
+ This is the default is the protected mode interface is available.
-
--mtrr:n setup memory type range registers for the vesafb framebuffer
-- where n:
-- 0 - disabled (equivalent to nomtrr) (default)
-- 1 - uncachable
-- 2 - write-back
-- 3 - write-combining
-- 4 - write-through
++
+mtrr:n Setup memory type range registers for the vesafb framebuffer
+ where n:
+ 0 - disabled (equivalent to nomtrr) (default)
+ 2 - write-back
+ 3 - write-combining
+ 4 - write-through
-
-- If you see the following in dmesg, choose the type that matches the
-- old one. In this example, use "mtrr:2".
++
+ If you see the following in dmesg, choose the type that matches
+ the old one. In this example, use "mtrr:2".
...
-Have fun!
+Options accepted only by vesafb-tng:
-
-- Gerd
++
+<mode> The mode you want to set, in the standard modedb format. Refer to
+ modedb.txt for a detailed description. If you specify a mode that is
+ not supported by your board's BIOS, vesafb-tng will attempt to set a
+maxhf:n Maximum horizontal frequency (in kHz).
+maxvf:n Maximum vertical frequency (in Hz).
+maxclk:n Maximum pixel clock (in MHz).
-+
+
+- Gerd
+Have fun!
--
+Extended documentation for vm86, VBE 3.0 and vesafb-tng by
+Michal Januszewski <spock@gentoo.org>
+
---- linux-2.6.17.orig/arch/i386/boot/video.S
-+++ linux-2.6.17/arch/i386/boot/video.S
-@@ -165,10 +165,12 @@ basret: ret
+diff --git a/arch/i386/boot/video.S b/arch/i386/boot/video.S
+index 2c5b5cc..2c2d4b5 100644
+--- a/arch/i386/boot/video.S
++++ b/arch/i386/boot/video.S
+@@ -163,10 +163,12 @@ basret: ret
# parameters in the default 80x25 mode -- these are set directly,
# because some very obscure BIOSes supply insane values.
mode_params:
movb $0x03, %ah # Read cursor position
xorb %bh, %bh
int $0x10
-@@ -201,6 +203,7 @@ mopar2: movb %al, %fs:(PARAM_VIDEO_LINES
+@@ -199,6 +201,7 @@ mopar2: movb %al, %fs:(PARAM_VIDEO_LINES)
ret
#ifdef CONFIG_VIDEO_SELECT
# Fetching of VESA frame buffer parameters
mopar_gr:
leaw modelist+1024, %di
-@@ -283,6 +286,7 @@ dac_done:
+@@ -281,6 +284,7 @@ dac_done:
movw %es, %fs:(PARAM_VESAPM_SEG)
movw %di, %fs:(PARAM_VESAPM_OFF)
no_pm: ret
# The video mode menu
mode_menu:
-@@ -497,10 +501,12 @@ mode_set:
+@@ -495,10 +499,12 @@ mode_set:
cmpb $VIDEO_FIRST_V7>>8, %ah
jz setv7
orb %ah, %ah
jz setmenu
-@@ -572,6 +578,7 @@ setr1: lodsw
+@@ -570,6 +576,7 @@ setr1: lodsw
movw -4(%si), %ax # Fetch mode ID
jmp _m_s
check_vesa:
leaw modelist+1024, %di
subb $VIDEO_FIRST_VESA>>8, %bh
-@@ -605,6 +612,7 @@ check_vesa:
+@@ -603,6 +610,7 @@ check_vesa:
ret
_setbad: jmp setbad # Ugly...
# Recalculate vertical display end registers -- this fixes various
# inconsistencies of extended modes on many adapters. Called when
---- linux-2.6.17.orig/drivers/video/Kconfig
-+++ linux-2.6.17/drivers/video/Kconfig
-@@ -472,8 +472,22 @@ config FB_TGA
+diff --git a/drivers/char/sysrq.c b/drivers/char/sysrq.c
+index 1393523..8a05f95 100644
+--- a/drivers/char/sysrq.c
++++ b/drivers/char/sysrq.c
+@@ -240,7 +240,7 @@ static void send_sig_all(int sig)
+ struct task_struct *p;
+
+ for_each_process(p) {
+- if (p->mm && !is_init(p))
++ if (p->mm && !is_init(p) && !(p->flags & PF_BORROWED_MM))
+ /* Not swapper, init nor kernel thread */
+ force_sig(sig, p);
+ }
+diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig
+index 4e83f01..ae122fd 100644
+--- a/drivers/video/Kconfig
++++ b/drivers/video/Kconfig
+@@ -547,8 +547,22 @@ config FB_TGA
cards. Say Y if you have one of those.
config FB_VESA
select FB_CFB_FILLRECT
select FB_CFB_COPYAREA
select FB_CFB_IMAGEBLIT
-@@ -481,7 +495,43 @@ config FB_VESA
+@@ -557,7 +571,43 @@ config FB_VESA
This is the frame buffer device driver for generic VESA 2.0
compliant graphic cards. The older VESA 1.2 cards are not supported.
You will get a boot time penguin logo at no additional cost. Please
+ select FB_CFB_COPYAREA
+ select FB_CFB_IMAGEBLIT
+ help
-+ This is the frame buffer device driver for generic VESA 2.0
-+ compliant graphic cards. It is capable of taking advantage of
-+ VBE 3.0 features. With this driver you will be able to adjust
-+ the refresh rate (VBE 3.0 compliant boards only) and change
-+ the graphic mode on-the-fly.
-+
-+ You will also get a boot time penguin logo at no additional cost. Please
-+ read <file:Documentation/fb/vesafb.txt>.
++ This is an enhanced generic frame buffer device driver for
++ VBE 2.0 compliant graphic cards. It can take advantage of VBE 3.0
++ features (refresh rate adjustment) when these are available.
++ The driver also makes it possible to change the video mode
++ on the fly and to switch back to text mode when it's unloaded.
++
++ If the driver is compiled as a module, the module will be called
++ vesafb-tng.
+
+endchoice
+
+ depends on FB_VESA
+ default y
- config VIDEO_SELECT
- bool
---- linux-2.6.17.orig/drivers/video/Makefile
-+++ linux-2.6.17/drivers/video/Makefile
-@@ -97,7 +97,11 @@ obj-$(CONFIG_FB_IMX) += imx
- obj-$(CONFIG_FB_S3C2410) += s3c2410fb.o
+ config FB_IMAC
+ bool "Intel-based Macintosh Framebuffer Support"
+diff --git a/drivers/video/Makefile b/drivers/video/Makefile
+index 309a26d..e57b0e7 100644
+--- a/drivers/video/Makefile
++++ b/drivers/video/Makefile
+@@ -102,7 +102,11 @@ obj-$(CONFIG_FB_PNX4008_DUM_RGB) += pnx4008/
+ obj-$(CONFIG_FB_IBM_GXT4500) += gxt4500.o
# Platform or fallback drivers go here
-obj-$(CONFIG_FB_VESA) += vesafb.o
+else
+ obj-$(CONFIG_FB_VESA) += vesafb-thread.o vesafb-tng.o
+endif
+ obj-$(CONFIG_FB_IMAC) += imacfb.o
obj-$(CONFIG_FB_VGA16) += vga16fb.o vgastate.o
obj-$(CONFIG_FB_OF) += offb.o
-
---- linux-2.6.17.orig/drivers/video/fbmem.c
-+++ linux-2.6.17/drivers/video/fbmem.c
-@@ -1438,6 +1438,7 @@ fbmem_init(void)
+diff --git a/drivers/video/fbmem.c b/drivers/video/fbmem.c
+index 3cfea31..bfb39cc 100644
+--- a/drivers/video/fbmem.c
++++ b/drivers/video/fbmem.c
+@@ -1408,6 +1408,7 @@ fbmem_init(void)
printk(KERN_WARNING "Unable to create fb class; errno = %ld\n", PTR_ERR(fb_class));
fb_class = NULL;
}
return 0;
}
---- linux-2.6.17.orig/drivers/video/modedb.c
-+++ linux-2.6.17/drivers/video/modedb.c
-@@ -671,6 +671,7 @@ void fb_var_to_videomode(struct fb_video
+diff --git a/drivers/video/modedb.c b/drivers/video/modedb.c
+index 5df41f6..f838a53 100644
+--- a/drivers/video/modedb.c
++++ b/drivers/video/modedb.c
+@@ -674,6 +674,7 @@ void fb_var_to_videomode(struct fb_videomode *mode,
{
u32 pixclock, hfreq, htotal, vtotal;
mode->name = NULL;
mode->xres = var->xres;
mode->yres = var->yres;
+@@ -1025,3 +1026,4 @@ EXPORT_SYMBOL(fb_find_best_mode);
+ EXPORT_SYMBOL(fb_find_nearest_mode);
+ EXPORT_SYMBOL(fb_videomode_to_modelist);
+ EXPORT_SYMBOL(fb_find_mode);
++EXPORT_SYMBOL(fb_destroy_modelist);
+diff --git a/drivers/video/vesafb-thread.c b/drivers/video/vesafb-thread.c
+new file mode 100644
+index 0000000..543e202
--- /dev/null
-+++ linux-2.6.17/drivers/video/vesafb-thread.c
-@@ -0,0 +1,727 @@
++++ b/drivers/video/vesafb-thread.c
+@@ -0,0 +1,751 @@
+/*
+ * Framebuffer driver for VBE 2.0+ compliant graphic boards.
+ * Kernel thread and vm86 routines.
+ *
+ */
+
-+#include <linux/config.h>
-+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <linux/completion.h>
+#include <linux/module.h>
+#include <linux/mm.h>
+#include <linux/delay.h>
+#include <linux/signal.h>
++#include <linux/freezer.h>
+#include <linux/suspend.h>
+#include <linux/unistd.h>
+#include <video/vesa.h>
+#include <asm/mmu_context.h>
+#include "edid.h"
+
-+#ifdef MODULE
-+int errno;
-+#endif
++static int errno;
+
+static DECLARE_COMPLETION(vesafb_th_completion);
+static DECLARE_MUTEX(vesafb_task_list_sem);
+static struct vm86_struct vm86;
+static int vesafb_pid = 0;
+
-+_syscall3(int,ioperm,unsigned long, a, unsigned long, b, unsigned long, c);
-+_syscall1(int,vm86old,struct vm86_struct __user*, v86);
-+
+#define DEFAULT_VM86_FLAGS (IF_MASK | IOPL_MASK)
+#define VM86_PUSHW(x) \
+do { \
+
+#define FLAG_D (1 << 10)
+
++/* Syscalls used by the vesafb thread */
++static int vm86old(struct vm86_struct __user* v86)
++{
++ long res;
++ __asm__ volatile ("push %%ebx; movl %2, %%ebx ; int $0x80 ; pop %%ebx"
++ : "=a" (res)
++ : "0" (__NR_vm86old), "ri" ((long)(v86)) : "memory");
++
++ if ((unsigned long)(res) >= (unsigned long)(-MAX_ERRNO)) {
++ errno = -res;
++ res = -1;
++ }
++ return (int)res;
++}
++
++static int ioperm(unsigned long a, unsigned long b, unsigned long c)
++{
++ long res;
++ __asm__ volatile ("push %%ebx; movl %2, %%ebx ; int $0x80 ; pop %%ebx"
++ : "=a" (res)
++ : "0" (__NR_ioperm), "ri" ((long)(a)), "c" ((long)(b)),
++ "d" ((long)(c)) : "memory");
++
++ if ((unsigned long)(res) >= (unsigned long)(-MAX_ERRNO)) {
++ errno = -res;
++ res = -1;
++ }
++ return (int)res;
++}
++
+/* Segment prefix opcodes */
+enum {
+ P_CS = 0x2e,
+ struct mm_struct *mm = current->mm;
+ int ret = 0;
+
-+ vma = kmem_cache_alloc(vm_area_cachep, SLAB_KERNEL);
++ vma = kmem_cache_alloc(vm_area_cachep, GFP_KERNEL);
+ if (!vma)
+ return -ENOMEM;
+ memset(vma, 0, sizeof(*vma));
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Michal Januszewski");
+
+diff --git a/drivers/video/vesafb-tng.c b/drivers/video/vesafb-tng.c
+new file mode 100644
+index 0000000..b4d4394
--- /dev/null
-+++ linux-2.6.17/drivers/video/vesafb-tng.c
-@@ -0,0 +1,1598 @@
++++ b/drivers/video/vesafb-tng.c
+@@ -0,0 +1,1586 @@
+/*
+ * Framebuffer driver for VBE 2.0+ compliant graphic boards
+ *
+ int clen = 0, i;
+
+ for (i = 0; i < vbe_modes_cnt; i++) {
-+ clen += sprintf(buf + clen, "%dx%d-%d\n", vbe_modes[i].x_res,
-+ vbe_modes[i].y_res, vbe_modes[i].depth);
-+ }
-+ *start = buf + offset;
-+
-+ if (clen > offset) {
-+ clen -= offset;
-+ } else {
-+ clen = 0;
++ clen += min(snprintf(buf + clen, len - clen, "%dx%d-%d\n", vbe_modes[i].x_res,
++ vbe_modes[i].y_res, vbe_modes[i].depth), len - clen);
+ }
++ *eof = 1;
+ return clen;
+}
+
+{
+ int clen = 0;
+
-+ clen += sprintf(buf + clen, "Version: %d.%d\n",
++ clen += min(snprintf(buf + clen, len, "Version: %d.%d\n",
+ ((vbe_ib.vbe_version & 0xff00) >> 8),
-+ vbe_ib.vbe_version & 0xff);
-+ clen += sprintf(buf + clen, "Vendor: %s\n",
-+ (char*)vbe_ib.oem_vendor_name_ptr);
-+ clen += sprintf(buf + clen, "Product: %s\n",
-+ (char*)vbe_ib.oem_product_name_ptr);
-+ clen += sprintf(buf + clen, "OEM rev: %s\n",
-+ (char*)vbe_ib.oem_product_rev_ptr);
-+ clen += sprintf(buf + clen, "OEM string: %s\n",
-+ (char*)vbe_ib.oem_string_ptr);
-+
-+ *start = buf + offset;
-+
-+ if (clen > offset) {
-+ clen -= offset;
-+ } else {
-+ clen = 0;
-+ }
++ vbe_ib.vbe_version & 0xff), len);
++ clen += min(snprintf(buf + clen, len - clen, "Vendor: %s\n",
++ (char*)vbe_ib.oem_vendor_name_ptr), len - clen);
++ clen += min(snprintf(buf + clen, len - clen, "Product: %s\n",
++ (char*)vbe_ib.oem_product_name_ptr), len - clen);
++ clen += min(snprintf(buf + clen, len - clen, "OEM rev: %s\n",
++ (char*)vbe_ib.oem_product_rev_ptr), len - clen);
++ clen += min(snprintf(buf + clen, len - clen, "OEM string: %s\n",
++ (char*)vbe_ib.oem_string_ptr), len - clen);
++
++ *eof = 1;
+ return clen;
+}
+
+MODULE_PARM_DESC(vgapal,"bool: set palette using VGA registers");
+module_param_named(pmipal, pmi_setpal, bool, 0);
+MODULE_PARM_DESC(pmipal,"bool: set palette using PMI calls");
-+module_param_named(nomtrr, mtrr, invbool, 0);
-+MODULE_PARM_DESC(nomtrr,"bool: disable use of MTRR registers");
++module_param(mtrr, uint, 0);
++MODULE_PARM_DESC(mtrr,"Memory Type Range Registers setting. Use 0 to disable.");
+module_param(blank, bool, 1);
+MODULE_PARM_DESC(blank,"bool: enable hardware blanking");
+module_param(nocrtc, bool, 0);
+MODULE_AUTHOR("Michal Januszewski");
+MODULE_DESCRIPTION("Framebuffer driver for VBE2.0+ compliant graphics boards");
+
---- linux-2.6.17.orig/include/linux/sched.h
-+++ linux-2.6.17/include/linux/sched.h
-@@ -1159,6 +1159,8 @@ extern void mmput(struct mm_struct *);
+diff --git a/include/linux/sched.h b/include/linux/sched.h
+index 4463735..7283e48 100644
+--- a/include/linux/sched.h
++++ b/include/linux/sched.h
+@@ -1390,6 +1390,8 @@ extern void mmput(struct mm_struct *);
extern struct mm_struct *get_task_mm(struct task_struct *task);
/* Remove the current tasks stale references to the old mm_struct */
extern void mm_release(struct task_struct *, struct mm_struct *);
extern int copy_thread(int, unsigned long, unsigned long, unsigned long, struct task_struct *, struct pt_regs *);
extern void flush_thread(void);
+diff --git a/include/video/vesa.h b/include/video/vesa.h
+new file mode 100644
+index 0000000..bb5abcf
--- /dev/null
-+++ linux-2.6.17/include/video/vesa.h
++++ b/include/video/vesa.h
@@ -0,0 +1,150 @@
+#if 0
+#define DPRINTK(fmt, args...) printk(KERN_DEBUG "%s: " fmt, __FUNCTION__ , \
+ struct vesafb_crtc_ib crtc;
+};
+
---- linux-2.6.17.orig/kernel/fork.c
-+++ linux-2.6.17/kernel/fork.c
-@@ -97,6 +97,7 @@ kmem_cache_t *fs_cachep;
+diff --git a/kernel/fork.c b/kernel/fork.c
+index fc723e5..dc8f93b 100644
+--- a/kernel/fork.c
++++ b/kernel/fork.c
+@@ -100,6 +100,7 @@ struct kmem_cache *fs_cachep;
/* SLAB cache for vm_area_struct structures */
- kmem_cache_t *vm_area_cachep;
+ struct kmem_cache *vm_area_cachep;
+EXPORT_SYMBOL_GPL(vm_area_cachep);
/* SLAB cache for mm_struct structures (tsk->mm) */
- static kmem_cache_t *mm_cachep;
-@@ -383,6 +384,40 @@ void mmput(struct mm_struct *mm)
+ static struct kmem_cache *mm_cachep;
+@@ -399,6 +400,40 @@ void mmput(struct mm_struct *mm)
EXPORT_SYMBOL_GPL(mmput);
/**
* get_task_mm - acquire a reference to the task's mm
*
* Returns %NULL if the task has no mm. Checks PF_BORROWED_MM (meaning
---- linux-2.6.17.orig/mm/memory.c
-+++ linux-2.6.17/mm/memory.c
-@@ -1162,6 +1162,7 @@ int zeromap_page_range(struct vm_area_st
+diff --git a/mm/memory.c b/mm/memory.c
+index 563792f..a9519ea 100644
+--- a/mm/memory.c
++++ b/mm/memory.c
+@@ -1193,6 +1193,7 @@ int zeromap_page_range(struct vm_area_struct *vma,
} while (pgd++, addr = next, addr != end);
return err;
}
pte_t * fastcall get_locked_pte(struct mm_struct *mm, unsigned long addr, spinlock_t **ptl)
{
---- linux-2.6.17.orig/mm/mmap.c
-+++ linux-2.6.17/mm/mmap.c
-@@ -1996,6 +1996,7 @@ int insert_vm_struct(struct mm_struct *
+diff --git a/mm/mmap.c b/mm/mmap.c
+index 9717337..6fa5b1c 100644
+--- a/mm/mmap.c
++++ b/mm/mmap.c
+@@ -2024,6 +2024,7 @@ int insert_vm_struct(struct mm_struct * mm, struct vm_area_struct * vma)
vma_link(mm, vma, prev, rb_link, rb_parent);
return 0;
}
