linux-stable.git/arch/arm/kernel/module.c, branch v2.6.38 Linux kernel stable tree ARM: fixup SMP alternatives in modules 2011-02-10T15:25:18+00:00 Russell King rmk+kernel@arm.linux.org.uk 2011-02-10T15:25:18+00:00 4a9cb360197684a861bc06f06d33d5fcc8ffcbf5 With certain configurations, we inline the unlock functions in modules, which results in SMP alternatives being created in modules. We need to fix those up when loading a module to prevent undefined instruction faults. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
With certain configurations, we inline the unlock functions in modules,
which results in SMP alternatives being created in modules.  We need to
fix those up when loading a module to prevent undefined instruction
faults.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
mm: unify module_alloc code for vmalloc 2011-01-14T01:32:34+00:00 David Rientjes rientjes@google.com 2011-01-13T23:46:02+00:00 d0a21265dfb5fa8ae54e90d0fb6d1c215b10a28a Four architectures (arm, mips, sparc, x86) use __vmalloc_area() for module_init(). Much of the code is duplicated and can be generalized in a globally accessible function, __vmalloc_node_range(). __vmalloc_node() now calls into __vmalloc_node_range() with a range of [VMALLOC_START, VMALLOC_END) for functionally equivalent behavior. Each architecture may then use __vmalloc_node_range() directly to remove the duplication of code. Signed-off-by: David Rientjes <rientjes@google.com> Cc: Christoph Lameter <cl@linux.com> Cc: Russell King <linux@arm.linux.org.uk> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: "David S. Miller" <davem@davemloft.net> Cc: Ingo Molnar <mingo@redhat.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> 
Four architectures (arm, mips, sparc, x86) use __vmalloc_area() for
module_init().  Much of the code is duplicated and can be generalized in a
globally accessible function, __vmalloc_node_range().

__vmalloc_node() now calls into __vmalloc_node_range() with a range of
[VMALLOC_START, VMALLOC_END) for functionally equivalent behavior.

Each architecture may then use __vmalloc_node_range() directly to remove
the duplication of code.

Signed-off-by: David Rientjes <rientjes@google.com>
Cc: Christoph Lameter <cl@linux.com>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
ARM: module: ignore unwind for sections not marked SHF_ALLOC 2010-12-01T10:23:05+00:00 Russell King rmk+kernel@arm.linux.org.uk 2010-11-12T13:04:16+00:00 50005a8deb38e5e6456ebd94e57adb321d4589de If a section is not marked with SHF_ALLOC, it will be discarded by the module code. Therefore, it is not correct to register the unwind tables. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
If a section is not marked with SHF_ALLOC, it will be discarded
by the module code.  Therefore, it is not correct to register
the unwind tables.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: module: clean up handling of ELF unwind tables 2010-12-01T10:23:04+00:00 Russell King rmk+kernel@arm.linux.org.uk 2010-11-12T13:02:46+00:00 8931360eb9c6ec8bd30efef579cef81917a2fcf3 There's no need to keep pointers to the ELF sections available while the module is loaded - we only need the section pointers while we're finding and registering the unwind tables, which can all be done during the finalize stage of loading. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
There's no need to keep pointers to the ELF sections available while
the module is loaded - we only need the section pointers while we're
finding and registering the unwind tables, which can all be done during
the finalize stage of loading.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: 6340/1: module - additional unwind tables for exit/devexit sections 2010-09-02T14:31:35+00:00 Phil Carmody ext-phil.2.carmody@nokia.com 2010-08-19T14:19:04+00:00 09e56a2d076c2afb2a1932ae4283e10ef2d26ef3 Without these, exit functions cannot be stack-traced, so to speak. This implies that module unloads that perform allocations (don't laugh) will cause noisy warnings on the console when kmemleak is enabled, as it presumes that all code's call chains are traceable. Similarly, BUGs and WARN_ONs will give additional console spam. Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Without these, exit functions cannot be stack-traced, so to speak.
This implies that module unloads that perform allocations (don't
laugh) will cause noisy warnings on the console when kmemleak is
enabled, as it presumes that all code's call chains are traceable.
Similarly, BUGs and WARN_ONs will give additional console spam.

Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: 6339/1: module - simplify unwind table handling 2010-09-02T14:31:35+00:00 Phil Carmody ext-phil.2.carmody@nokia.com 2010-08-19T14:16:37+00:00 e5f7772eec3ec342ecfe686ab8330ef538af134b The various sections are all dealt with similarly, so factor out that common behaviour. (Incorporating Peter Huewe's fix.) Cc: Peter Huewe <peterhuewe@gmx.de> Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
The various sections are all dealt with similarly, so factor out
that common behaviour. (Incorporating Peter Huewe's fix.)

Cc: Peter Huewe <peterhuewe@gmx.de>
Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: 6338/1: module - simplify code with temporaries 2010-09-02T14:31:34+00:00 Phil Carmody ext-phil.2.carmody@nokia.com 2010-08-19T14:10:24+00:00 5793432628ad76f93ae4d31c23fb1c26e3d8b525 Less to read. Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com> Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Less to read.

Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com>
Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: 6191/1: Do not compile the Thumb-2 module relocations on an ARM kernel 2010-08-05T09:35:48+00:00 Catalin Marinas catalin.marinas@arm.com 2010-06-21T14:11:38+00:00 b749315601b44a63634d1a38fd167b8cac0e9ad4 Kernels compiled to ARM do not need to handle Thumb-2 module relocations as interworking is not allowed. This patch #ifdef's out the handling of such relocations. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Kernels compiled to ARM do not need to handle Thumb-2 module relocations
as interworking is not allowed. This patch #ifdef's out the handling of
such relocations.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: 6190/1: Remove dummy loads from the original relocation address 2010-08-05T09:35:47+00:00 Catalin Marinas catalin.marinas@arm.com 2010-06-21T14:11:08+00:00 0567821cd8aac3f390282e02c9ba633894cbf7c1 Reading back the upper and lower values in the R_ARM_THM_CALL and R_ARM_THM_JUMP24 case was introduced by a previous commit but they are not needed. Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
Reading back the upper and lower values in the R_ARM_THM_CALL and
R_ARM_THM_JUMP24 case was introduced by a previous commit but they are
not needed.

Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
ARM: 6189/1: Add support for the MOVW/MOVT relocations in Thumb-2 2010-08-05T09:35:46+00:00 Catalin Marinas catalin.marinas@arm.com 2010-06-21T14:10:37+00:00 8dd47741d191400c46173ed9fba9d14b4033ce23 The patch adds handling case for the R_ARM_THM_MOVW_ABS_NC and R_ARM_THM_MOVT_ABS relocations in arch/arm/kernel/module.c. Such relocations may appear in Thumb-2 compiled kernel modules. Reported-by: Kyungmin Park <kmpark@infradead.org> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 
The patch adds handling case for the R_ARM_THM_MOVW_ABS_NC and
R_ARM_THM_MOVT_ABS relocations in arch/arm/kernel/module.c. Such
relocations may appear in Thumb-2 compiled kernel modules.

Reported-by: Kyungmin Park <kmpark@infradead.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>