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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/xtensa
parent9c0e6a89b592f4c4e4d769dbc22d399ab0685159 (diff)
parentaec499c75cf8e0b599be4d559e6922b613085f8f (diff)
downloadlwn-194dfe88d62ed12d0cf30f6f20734c2d0d111533.tar.gz
lwn-194dfe88d62ed12d0cf30f6f20734c2d0d111533.zip
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/xtensa')
-rw-r--r--arch/xtensa/Kconfig1
-rw-r--r--arch/xtensa/include/asm/asm-uaccess.h71
-rw-r--r--arch/xtensa/include/asm/processor.h7
-rw-r--r--arch/xtensa/include/asm/thread_info.h3
-rw-r--r--arch/xtensa/include/asm/uaccess.h26
-rw-r--r--arch/xtensa/include/uapi/asm/shmbuf.h5
-rw-r--r--arch/xtensa/include/uapi/asm/signal.h2
-rw-r--r--arch/xtensa/kernel/asm-offsets.c3
8 files changed, 6 insertions, 112 deletions
diff --git a/arch/xtensa/Kconfig b/arch/xtensa/Kconfig
index 887432327613..95bdbaaa5ae6 100644
--- a/arch/xtensa/Kconfig
+++ b/arch/xtensa/Kconfig
@@ -41,7 +41,6 @@ config XTENSA
select IRQ_DOMAIN
select MODULES_USE_ELF_RELA
select PERF_USE_VMALLOC
- select SET_FS
select TRACE_IRQFLAGS_SUPPORT
select VIRT_TO_BUS
help
diff --git a/arch/xtensa/include/asm/asm-uaccess.h b/arch/xtensa/include/asm/asm-uaccess.h
index 7f6cf4151843..7cec869136e3 100644
--- a/arch/xtensa/include/asm/asm-uaccess.h
+++ b/arch/xtensa/include/asm/asm-uaccess.h
@@ -24,76 +24,6 @@
#include <asm/processor.h>
/*
- * These assembly macros mirror the C macros in asm/uaccess.h. They
- * should always have identical functionality. See
- * arch/xtensa/kernel/sys.S for usage.
- */
-
-#define KERNEL_DS 0
-#define USER_DS 1
-
-/*
- * get_fs reads current->thread.current_ds into a register.
- * On Entry:
- * <ad> anything
- * <sp> stack
- * On Exit:
- * <ad> contains current->thread.current_ds
- */
- .macro get_fs ad, sp
- GET_CURRENT(\ad,\sp)
-#if THREAD_CURRENT_DS > 1020
- addi \ad, \ad, TASK_THREAD
- l32i \ad, \ad, THREAD_CURRENT_DS - TASK_THREAD
-#else
- l32i \ad, \ad, THREAD_CURRENT_DS
-#endif
- .endm
-
-/*
- * set_fs sets current->thread.current_ds to some value.
- * On Entry:
- * <at> anything (temp register)
- * <av> value to write
- * <sp> stack
- * On Exit:
- * <at> destroyed (actually, current)
- * <av> preserved, value to write
- */
- .macro set_fs at, av, sp
- GET_CURRENT(\at,\sp)
- s32i \av, \at, THREAD_CURRENT_DS
- .endm
-
-/*
- * kernel_ok determines whether we should bypass addr/size checking.
- * See the equivalent C-macro version below for clarity.
- * On success, kernel_ok branches to a label indicated by parameter
- * <success>. This implies that the macro falls through to the next
- * insruction on an error.
- *
- * Note that while this macro can be used independently, we designed
- * in for optimal use in the access_ok macro below (i.e., we fall
- * through on error).
- *
- * On Entry:
- * <at> anything (temp register)
- * <success> label to branch to on success; implies
- * fall-through macro on error
- * <sp> stack pointer
- * On Exit:
- * <at> destroyed (actually, current->thread.current_ds)
- */
-
-#if ((KERNEL_DS != 0) || (USER_DS == 0))
-# error Assembly macro kernel_ok fails
-#endif
- .macro kernel_ok at, sp, success
- get_fs \at, \sp
- beqz \at, \success
- .endm
-
-/*
* user_ok determines whether the access to user-space memory is allowed.
* See the equivalent C-macro version below for clarity.
*
@@ -147,7 +77,6 @@
* <at> destroyed
*/
.macro access_ok aa, as, at, sp, error
- kernel_ok \at, \sp, .Laccess_ok_\@
user_ok \aa, \as, \at, \error
.Laccess_ok_\@:
.endm
diff --git a/arch/xtensa/include/asm/processor.h b/arch/xtensa/include/asm/processor.h
index 37d3e9887fe7..abad7c3df46f 100644
--- a/arch/xtensa/include/asm/processor.h
+++ b/arch/xtensa/include/asm/processor.h
@@ -152,18 +152,12 @@
*/
#define SPILL_SLOT_CALL12(sp, reg) (*(((unsigned long *)(sp)) - 16 + (reg)))
-typedef struct {
- unsigned long seg;
-} mm_segment_t;
-
struct thread_struct {
/* kernel's return address and stack pointer for context switching */
unsigned long ra; /* kernel's a0: return address and window call size */
unsigned long sp; /* kernel's a1: stack pointer */
- mm_segment_t current_ds; /* see uaccess.h for example uses */
-
/* struct xtensa_cpuinfo info; */
unsigned long bad_vaddr; /* last user fault */
@@ -186,7 +180,6 @@ struct thread_struct {
{ \
ra: 0, \
sp: sizeof(init_stack) + (long) &init_stack, \
- current_ds: {0}, \
/*info: {0}, */ \
bad_vaddr: 0, \
bad_uaddr: 0, \
diff --git a/arch/xtensa/include/asm/thread_info.h b/arch/xtensa/include/asm/thread_info.h
index a312333a9add..f6fcbba1d02f 100644
--- a/arch/xtensa/include/asm/thread_info.h
+++ b/arch/xtensa/include/asm/thread_info.h
@@ -52,8 +52,6 @@ struct thread_info {
__u32 cpu; /* current CPU */
__s32 preempt_count; /* 0 => preemptable,< 0 => BUG*/
- mm_segment_t addr_limit; /* thread address space */
-
unsigned long cpenable;
#if XCHAL_HAVE_EXCLUSIVE
/* result of the most recent exclusive store */
@@ -81,7 +79,6 @@ 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/xtensa/include/asm/uaccess.h b/arch/xtensa/include/asm/uaccess.h
index 75bd8fbf52ba..56aec6d504fe 100644
--- a/arch/xtensa/include/asm/uaccess.h
+++ b/arch/xtensa/include/asm/uaccess.h
@@ -19,31 +19,7 @@
#include <linux/prefetch.h>
#include <asm/types.h>
#include <asm/extable.h>
-
-/*
- * 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 (Data Segment Register?), these macros are
- * grossly misnamed.
- */
-
-#define KERNEL_DS ((mm_segment_t) { 0 })
-#define USER_DS ((mm_segment_t) { 1 })
-
-#define get_fs() (current->thread.current_ds)
-#define set_fs(val) (current->thread.current_ds = (val))
-
-#define uaccess_kernel() (get_fs().seg == KERNEL_DS.seg)
-
-#define __kernel_ok (uaccess_kernel())
-#define __user_ok(addr, size) \
- (((size) <= TASK_SIZE)&&((addr) <= TASK_SIZE-(size)))
-#define __access_ok(addr, size) (__kernel_ok || __user_ok((addr), (size)))
-#define access_ok(addr, size) __access_ok((unsigned long)(addr), (size))
-
-#define user_addr_max() (uaccess_kernel() ? ~0UL : TASK_SIZE)
+#include <asm-generic/access_ok.h>
/*
* These are the main single-value transfer routines. They
diff --git a/arch/xtensa/include/uapi/asm/shmbuf.h b/arch/xtensa/include/uapi/asm/shmbuf.h
index 554a57a6a90f..bb8bdddae9b5 100644
--- a/arch/xtensa/include/uapi/asm/shmbuf.h
+++ b/arch/xtensa/include/uapi/asm/shmbuf.h
@@ -20,9 +20,12 @@
#ifndef _XTENSA_SHMBUF_H
#define _XTENSA_SHMBUF_H
+#include <asm/ipcbuf.h>
+#include <asm/posix_types.h>
+
struct shmid64_ds {
struct ipc64_perm shm_perm; /* operation perms */
- size_t shm_segsz; /* size of segment (bytes) */
+ __kernel_size_t shm_segsz; /* size of segment (bytes) */
unsigned long shm_atime; /* last attach time */
unsigned long shm_atime_high;
unsigned long shm_dtime; /* last detach time */
diff --git a/arch/xtensa/include/uapi/asm/signal.h b/arch/xtensa/include/uapi/asm/signal.h
index 79ddabaa4e5d..b8c824dd4b74 100644
--- a/arch/xtensa/include/uapi/asm/signal.h
+++ b/arch/xtensa/include/uapi/asm/signal.h
@@ -103,7 +103,7 @@ struct sigaction {
typedef struct sigaltstack {
void *ss_sp;
int ss_flags;
- size_t ss_size;
+ __kernel_size_t ss_size;
} stack_t;
#endif /* __ASSEMBLY__ */
diff --git a/arch/xtensa/kernel/asm-offsets.c b/arch/xtensa/kernel/asm-offsets.c
index dc5c83cad9be..f1fd1390d069 100644
--- a/arch/xtensa/kernel/asm-offsets.c
+++ b/arch/xtensa/kernel/asm-offsets.c
@@ -87,7 +87,6 @@ int main(void)
OFFSET(TI_STSTUS, thread_info, status);
OFFSET(TI_CPU, thread_info, cpu);
OFFSET(TI_PRE_COUNT, thread_info, preempt_count);
- OFFSET(TI_ADDR_LIMIT, thread_info, addr_limit);
/* struct thread_info (offset from start_struct) */
DEFINE(THREAD_RA, offsetof (struct task_struct, thread.ra));
@@ -108,8 +107,6 @@ int main(void)
#endif
DEFINE(THREAD_XTREGS_USER, offsetof (struct thread_info, xtregs_user));
DEFINE(XTREGS_USER_SIZE, sizeof(xtregs_user_t));
- DEFINE(THREAD_CURRENT_DS, offsetof (struct task_struct, \
- thread.current_ds));
/* struct mm_struct */
DEFINE(MM_USERS, offsetof(struct mm_struct, mm_users));