projects/linux·commit a1339d63

Merge tag 'powerpc-5.11-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux

a1339d63 · Linus Torvalds <[email protected]> · 2021-01-17 12:28:58 -08:00

Pull powerpc fixes from Michael Ellerman:
 "One fix for a lack of alignment in our linker script, that can lead to
  crashes depending on configuration etc.

  One fix for the 32-bit VDSO after the C VDSO conversion.

  Thanks to Andreas Schwab, Ariel Marcovitch, and Christophe Leroy"

* tag 'powerpc-5.11-4' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux:
  powerpc/vdso: Fix clock_gettime_fallback for vdso32
  powerpc: Fix alignment bug within the init sections
Commit
a1339d6355ac42e1bf4fcdfce8bfce61172f8891
Parents
a527a2b3 · 41131a5e

Merge commit. Changes below are compared with the first parent: a527a2b3.

Changes

2 files changed · +23 −1

FileStatusAddDelContent
arch/powerpc/include/asm/vdso/gettimeofday.hmodified+15−1View file
arch/powerpc/kernel/vmlinux.lds.Smodified+8−0View file

arch/powerpc/include/asm/vdso/gettimeofday.h

View file
diff --git a/arch/powerpc/include/asm/vdso/gettimeofday.h b/arch/powerpc/include/asm/vdso/gettimeofday.h
index 81671aa..77c635c 100644
--- a/arch/powerpc/include/asm/vdso/gettimeofday.h
+++ b/arch/powerpc/include/asm/vdso/gettimeofday.h
@@ -103,6 +103,8 @@ int gettimeofday_fallback(struct __kernel_old_timeval *_tv, struct timezone *_tz
return do_syscall_2(__NR_gettimeofday, (unsigned long)_tv, (unsigned long)_tz);
}
+#ifdef __powerpc64__
+
static __always_inline
int clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
{
@@ -115,11 +117,23 @@ int clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
return do_syscall_2(__NR_clock_getres, _clkid, (unsigned long)_ts);
}
-#ifdef CONFIG_VDSO32
+#else
#define BUILD_VDSO32 1
static __always_inline
+int clock_gettime_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
+{
+ return do_syscall_2(__NR_clock_gettime64, _clkid, (unsigned long)_ts);
+}
+
+static __always_inline
+int clock_getres_fallback(clockid_t _clkid, struct __kernel_timespec *_ts)
+{
+ return do_syscall_2(__NR_clock_getres_time64, _clkid, (unsigned long)_ts);
+}
+
+static __always_inline
int clock_gettime32_fallback(clockid_t _clkid, struct old_timespec32 *_ts)
{
return do_syscall_2(__NR_clock_gettime, _clkid, (unsigned long)_ts);

arch/powerpc/kernel/vmlinux.lds.S

View file
diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 8e0b129..4ab426b 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -187,6 +187,12 @@ SECTIONS
.init.text : AT(ADDR(.init.text) - LOAD_OFFSET) {
_sinittext = .;
INIT_TEXT
+
+ /*
+ *.init.text might be RO so we must ensure this section ends on
+ * a page boundary.
+ */
+ . = ALIGN(PAGE_SIZE);
_einittext = .;
#ifdef CONFIG_PPC64
*(.tramp.ftrace.init);
@@ -200,6 +206,8 @@ SECTIONS
EXIT_TEXT
}
+ . = ALIGN(PAGE_SIZE);
+
INIT_DATA_SECTION(16)
. = ALIGN(8);