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powerpc fixes for 5.11 #4

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

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
This commit is contained in:
Linus Torvalds 2021-01-17 12:28:58 -08:00
commit a1339d6355
2 changed files with 23 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
arch/powerpc/include/asm/vdso/gettimeofday.h
View File

@ -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)
{
@ -115,10 +117,22 @@ 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)
{

8
arch/powerpc/kernel/vmlinux.lds.S
View File

@ -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);