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| author | David S. Miller <davem@davemloft.net> | 2009-06-15 03:02:23 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2009-06-15 03:02:23 -0700 |
| commit | 9cbc1cb8cd46ce1f7645b9de249b2ce8460129bb (patch) | |
| tree | 8d104ec2a459346b99413b0b77421ca7b9936c1a /arch/sparc/mm/extable.c | |
| parent | ca44d6e60f9de26281fda203f58b570e1748c015 (diff) | |
| parent | 45e3e1935e2857c54783291107d33323b3ef33c8 (diff) | |
| download | kernel_samsung_smdk4412-9cbc1cb8cd46ce1f7645b9de249b2ce8460129bb.tar.gz kernel_samsung_smdk4412-9cbc1cb8cd46ce1f7645b9de249b2ce8460129bb.tar.bz2 kernel_samsung_smdk4412-9cbc1cb8cd46ce1f7645b9de249b2ce8460129bb.zip | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6
Conflicts:
Documentation/feature-removal-schedule.txt
drivers/scsi/fcoe/fcoe.c
net/core/drop_monitor.c
net/core/net-traces.c
Diffstat (limited to 'arch/sparc/mm/extable.c')
| -rw-r--r-- | arch/sparc/mm/extable.c | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/sparc/mm/extable.c b/arch/sparc/mm/extable.c index 16cc28935e3..a61c349448e 100644 --- a/arch/sparc/mm/extable.c +++ b/arch/sparc/mm/extable.c @@ -28,6 +28,10 @@ search_extable(const struct exception_table_entry *start, * word 3: last insn address + 4 bytes * word 4: fixup code address * + * Deleted entries are encoded as: + * word 1: unused + * word 2: -1 + * * See asm/uaccess.h for more details. */ @@ -39,6 +43,10 @@ search_extable(const struct exception_table_entry *start, continue; } + /* A deleted entry; see trim_init_extable */ + if (walk->fixup == -1) + continue; + if (walk->insn == value) return walk; } @@ -57,6 +65,27 @@ search_extable(const struct exception_table_entry *start, return NULL; } +#ifdef CONFIG_MODULES +/* We could memmove them around; easier to mark the trimmed ones. */ +void trim_init_extable(struct module *m) +{ + unsigned int i; + bool range; + + for (i = 0; i < m->num_exentries; i += range ? 2 : 1) { + range = m->extable[i].fixup == 0; + + if (within_module_init(m->extable[i].insn, m)) { + m->extable[i].fixup = -1; + if (range) + m->extable[i+1].fixup = -1; + } + if (range) + i++; + } +} +#endif /* CONFIG_MODULES */ + /* Special extable search, which handles ranges. Returns fixup */ unsigned long search_extables_range(unsigned long addr, unsigned long *g2) { |