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authorLinus Torvalds <torvalds@linux-foundation.org>2022-03-23 18:03:08 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2022-03-23 18:03:08 -0700
commit194dfe88d62ed12d0cf30f6f20734c2d0d111533 (patch)
treef057597d411df53a152ac41ae8bd900aabb94994 /arch/microblaze
parent9c0e6a89b592f4c4e4d769dbc22d399ab0685159 (diff)
parentaec499c75cf8e0b599be4d559e6922b613085f8f (diff)
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Merge tag 'asm-generic-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic
Pull asm-generic updates from Arnd Bergmann: "There are three sets of updates for 5.18 in the asm-generic tree: - The set_fs()/get_fs() infrastructure gets removed for good. This was already gone from all major architectures, but now we can finally remove it everywhere, which loses some particularly tricky and error-prone code. There is a small merge conflict against a parisc cleanup, the solution is to use their new version. - The nds32 architecture ends its tenure in the Linux kernel. The hardware is still used and the code is in reasonable shape, but the mainline port is not actively maintained any more, as all remaining users are thought to run vendor kernels that would never be updated to a future release. - A series from Masahiro Yamada cleans up some of the uapi header files to pass the compile-time checks" * tag 'asm-generic-5.18' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic: (27 commits) nds32: Remove the architecture uaccess: remove CONFIG_SET_FS ia64: remove CONFIG_SET_FS support sh: remove CONFIG_SET_FS support sparc64: remove CONFIG_SET_FS support lib/test_lockup: fix kernel pointer check for separate address spaces uaccess: generalize access_ok() uaccess: fix type mismatch warnings from access_ok() arm64: simplify access_ok() m68k: fix access_ok for coldfire MIPS: use simpler access_ok() MIPS: Handle address errors for accesses above CPU max virtual user address uaccess: add generic __{get,put}_kernel_nofault nios2: drop access_ok() check from __put_user() x86: use more conventional access_ok() definition x86: remove __range_not_ok() sparc64: add __{get,put}_kernel_nofault() nds32: fix access_ok() checks in get/put_user uaccess: fix nios2 and microblaze get_user_8() sparc64: fix building assembly files ...
Diffstat (limited to 'arch/microblaze')
-rw-r--r--arch/microblaze/Kconfig1
-rw-r--r--arch/microblaze/include/asm/thread_info.h6
-rw-r--r--arch/microblaze/include/asm/uaccess.h61
-rw-r--r--arch/microblaze/kernel/asm-offsets.c1
-rw-r--r--arch/microblaze/kernel/process.c1
5 files changed, 10 insertions, 60 deletions
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index da568e981604..8cf429ad1c84 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -42,7 +42,6 @@ config MICROBLAZE
select CPU_NO_EFFICIENT_FFS
select MMU_GATHER_NO_RANGE
select SPARSE_IRQ
- select SET_FS
select ZONE_DMA
select TRACE_IRQFLAGS_SUPPORT
select GENERIC_IRQ_MULTI_HANDLER
diff --git a/arch/microblaze/include/asm/thread_info.h b/arch/microblaze/include/asm/thread_info.h
index 44f5ca331862..a0ddd2a36fb9 100644
--- a/arch/microblaze/include/asm/thread_info.h
+++ b/arch/microblaze/include/asm/thread_info.h
@@ -56,17 +56,12 @@ struct cpu_context {
__u32 fsr;
};
-typedef struct {
- unsigned long seg;
-} mm_segment_t;
-
struct thread_info {
struct task_struct *task; /* main task structure */
unsigned long flags; /* low level flags */
unsigned long status; /* thread-synchronous flags */
__u32 cpu; /* current CPU */
__s32 preempt_count; /* 0 => preemptable,< 0 => BUG*/
- mm_segment_t addr_limit; /* thread address space */
struct cpu_context cpu_context;
};
@@ -80,7 +75,6 @@ struct thread_info {
.flags = 0, \
.cpu = 0, \
.preempt_count = INIT_PREEMPT_COUNT, \
- .addr_limit = KERNEL_DS, \
}
/* how to get the thread information struct from C */
diff --git a/arch/microblaze/include/asm/uaccess.h b/arch/microblaze/include/asm/uaccess.h
index d2a8ef9f8978..3aab2f17e046 100644
--- a/arch/microblaze/include/asm/uaccess.h
+++ b/arch/microblaze/include/asm/uaccess.h
@@ -15,48 +15,7 @@
#include <linux/pgtable.h>
#include <asm/extable.h>
#include <linux/string.h>
-
-/*
- * On Microblaze the fs value is actually the top of the corresponding
- * address space.
- *
- * The fs value determines whether argument validity checking should be
- * performed or not. If get_fs() == USER_DS, checking is performed, with
- * get_fs() == KERNEL_DS, checking is bypassed.
- *
- * For historical reasons, these macros are grossly misnamed.
- *
- * For non-MMU arch like Microblaze, KERNEL_DS and USER_DS is equal.
- */
-# define MAKE_MM_SEG(s) ((mm_segment_t) { (s) })
-
-# define KERNEL_DS MAKE_MM_SEG(0xFFFFFFFF)
-# define USER_DS MAKE_MM_SEG(TASK_SIZE - 1)
-
-# define get_fs() (current_thread_info()->addr_limit)
-# define set_fs(val) (current_thread_info()->addr_limit = (val))
-# define user_addr_max() get_fs().seg
-
-# define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg)
-
-static inline int access_ok(const void __user *addr, unsigned long size)
-{
- if (!size)
- goto ok;
-
- if ((get_fs().seg < ((unsigned long)addr)) ||
- (get_fs().seg < ((unsigned long)addr + size - 1))) {
- pr_devel("ACCESS fail at 0x%08x (size 0x%x), seg 0x%08x\n",
- (__force u32)addr, (u32)size,
- (u32)get_fs().seg);
- return 0;
- }
-ok:
- pr_devel("ACCESS OK at 0x%08x (size 0x%x), seg 0x%08x\n",
- (__force u32)addr, (u32)size,
- (u32)get_fs().seg);
- return 1;
-}
+#include <asm-generic/access_ok.h>
# define __FIXUP_SECTION ".section .fixup,\"ax\"\n"
# define __EX_TABLE_SECTION ".section __ex_table,\"a\"\n"
@@ -141,27 +100,27 @@ extern long __user_bad(void);
#define __get_user(x, ptr) \
({ \
- unsigned long __gu_val = 0; \
long __gu_err; \
switch (sizeof(*(ptr))) { \
case 1: \
- __get_user_asm("lbu", (ptr), __gu_val, __gu_err); \
+ __get_user_asm("lbu", (ptr), x, __gu_err); \
break; \
case 2: \
- __get_user_asm("lhu", (ptr), __gu_val, __gu_err); \
+ __get_user_asm("lhu", (ptr), x, __gu_err); \
break; \
case 4: \
- __get_user_asm("lw", (ptr), __gu_val, __gu_err); \
+ __get_user_asm("lw", (ptr), x, __gu_err); \
break; \
- case 8: \
- __gu_err = __copy_from_user(&__gu_val, ptr, 8); \
- if (__gu_err) \
- __gu_err = -EFAULT; \
+ case 8: { \
+ __u64 __x = 0; \
+ __gu_err = raw_copy_from_user(&__x, ptr, 8) ? \
+ -EFAULT : 0; \
+ (x) = (typeof(x))(typeof((x) - (x)))__x; \
break; \
+ } \
default: \
/* __gu_val = 0; __gu_err = -EINVAL;*/ __gu_err = __user_bad();\
} \
- x = (__force __typeof__(*(ptr))) __gu_val; \
__gu_err; \
})
diff --git a/arch/microblaze/kernel/asm-offsets.c b/arch/microblaze/kernel/asm-offsets.c
index b77dd188dec4..47ee409508b1 100644
--- a/arch/microblaze/kernel/asm-offsets.c
+++ b/arch/microblaze/kernel/asm-offsets.c
@@ -86,7 +86,6 @@ int main(int argc, char *argv[])
/* struct thread_info */
DEFINE(TI_TASK, offsetof(struct thread_info, task));
DEFINE(TI_FLAGS, offsetof(struct thread_info, flags));
- DEFINE(TI_ADDR_LIMIT, offsetof(struct thread_info, addr_limit));
DEFINE(TI_CPU_CONTEXT, offsetof(struct thread_info, cpu_context));
DEFINE(TI_PREEMPT_COUNT, offsetof(struct thread_info, preempt_count));
BLANK();
diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c
index 5e2b91c1e8ce..1b944d319d73 100644
--- a/arch/microblaze/kernel/process.c
+++ b/arch/microblaze/kernel/process.c
@@ -18,7 +18,6 @@
#include <linux/tick.h>
#include <linux/bitops.h>
#include <linux/ptrace.h>
-#include <linux/uaccess.h> /* for USER_DS macros */
#include <asm/cacheflush.h>
void show_regs(struct pt_regs *regs)