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Fix following sparse warning:
math_{32,64}.c: warning: symbol 'do_mathemu' was not declared. Should it be static?
Add prototype in processor_{32,64} and drop extern in traps_{32,64}.c
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The following asm statements generated a sparse warning:
asm("addcc \n\t" : "=r" (((USItype)(r2)))
warning: asm output is not an lvalue
When asking on the sparse mailing list Linus replyed:
"
Those casts to (USItype) are all pointless to begin with (since the
values are of that type already!) and they mean that the expression
isn't something you can assign to (lvalue).
"
In the math emulation code drop all casts in the output
parts of the asm statements.
This fixes a lot of "warning: asm output is not an lvalue" sparse
warnings in math_64.c.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The following asm statements generated a sparse warning:
asm("addcc \n\t" : "=r" (((USItype)(r2)))
warning: asm output is not an lvalue
When asking on the sparse mailing list Linus replyed:
"
Those casts to (USItype) are all pointless to begin with (since the
values are of that type already!) and they mean that the expression
isn't something you can assign to (lvalue).
"
In the math emulation code drop all casts in the output
parts of the asm statements.
This fixes a lot of "warning: asm output is not an lvalue" sparse
warnings in math_32.c.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warnings:
sys_sparc_32.c:32:26: warning: symbol 'sys_getpagesize' was not declared. Should it be static?
sys_sparc_32.c:71:16: warning: symbol 'sparc_pipe' was not declared. Should it be static?
sys_sparc_32.c:96:26: warning: symbol 'sys_mmap2' was not declared. Should it be static?
sys_sparc_32.c:106:26: warning: symbol 'sys_mmap' was not declared. Should it be static?
sys_sparc_32.c:114:6: warning: symbol 'sparc_remap_file_pages' was not declared. Should it be static?
sys_sparc_32.c:127:1: warning: symbol 'c_sys_nis_syscall' was not declared. Should it be static?
sys_sparc_32.c:144:1: warning: symbol 'sparc_breakpoint' was not declared. Should it be static?
sys_sparc_32.c:200:16: warning: symbol 'sys_getdomainname' was not declared. Should it be static?
Adapt systbls.h for use by both sparc32 + sparc64.
In the process modify the return type of a few functions.
Change return type from unsigned long to long:
sys_mmap2()
sys_mmap()
Change return type from int to long:
sparc_pipe()
sys_getdomainname()
The changed return type was done to align with sparc64.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warnings:
time_32.c:63:1: warning: symbol 'rtc_lock' was not declared. Should it be static?
time_32.c:357:13: warning: symbol 'time_init' was not declared. Should it be static?
time_32.c:148:16: warning: dereference of noderef expression
Add extern definition of rtc_lock in mc146818rtc.h.
time_init() is called from init/main.c - add prototype to kernel.h.
Use proper u32 __iomem * for master_l10_counter.
Fix all users.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warning:
auxio_32.c:133:33: warning: cast removes address space of expression
To fix this auxio_power_register had to be defined as u8 _iomem.
Use proper sbus operations on the pointer.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warnings:
pcic.c:164:14: warning: symbol 'pcic_regs' was not declared. Should it be static?
pcic.c:165:14: warning: symbol 'pcic_speculative' was not declared. Should it be static?
pcic.c:166:14: warning: symbol 'pcic_trapped' was not declared. Should it be static?
pcic.c:332:66: warning: Using plain integer as NULL pointer
pcic.c:344:66: warning: Using plain integer as NULL pointer
pcic.c:539:38: warning: Using plain integer as NULL pointer
pcic.c:677:1: warning: symbol 'pcic_pin_to_irq' was not declared. Should it be static?
pcic.c:783:6: warning: symbol 'pcic_nmi' was not declared. Should it be static?
Add extern for pcic_regs.
Define a few variables static.
Replace 0 with NULL.
Delete unused funtion pcic_pin_to_irq().
Include kernel.h so we could drop declaration of
t_nmi and add prototype for pcic_nmi.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warning:
io-unit.c:56:13: warning: incorrect type in assignment (different address spaces)
The page table for the io unit resides in __iomem.
Fix up all users of the io unit page table.
Introduce sbus helers for all read/write operations.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warning:
iommu.c:69:21: warning: incorrect type in assignment (different address spaces)
iommu_struct.regs is __iomem - fix up all users.
Introduce sbus operations for all read/write operations.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Add forward declaration to kernel.h to fix build breakage
in some configurations
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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This is the prevent previous stores from overlapping the block stores
done by the memcpy loop.
Based upon a glibc patch by Jose E. Marchesi
Signed-off-by: David S. Miller <davem@davemloft.net>
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Access to the TSB hash tables during TLB misses requires that there be
an atomic 128-bit quad load available so that we fetch a matching TAG
and DATA field at the same time.
On cpus prior to UltraSPARC-III only virtual address based quad loads
are available. UltraSPARC-III and later provide physical address
based variants which are easier to use.
When we only have virtual address based quad loads available this
means that we have to lock the TSB into the TLB at a fixed virtual
address on each cpu when it runs that process. We can't just access
the PAGE_OFFSET based aliased mapping of these TSBs because we cannot
take a recursive TLB miss inside of the TLB miss handler without
risking running out of hardware trap levels (some trap combinations
can be deep, such as those generated by register window spill and fill
traps).
Without huge pages it's working perfectly fine, but when the huge TSB
got added another chunk of fixed virtual address space was not
allocated for this second TSB mapping.
So we were mapping both the 8K and 4MB TSBs to the same exact virtual
address, causing multiple TLB matches which gives undefined behavior.
Signed-off-by: David S. Miller <davem@davemloft.net>
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addresses.
This was found using Dave Jone's trinity tool.
When a user process which is 32-bit performs a load or a store, the
cpu chops off the top 32-bits of the effective address before
translating it.
This is because we run 32-bit tasks with the PSTATE_AM (address
masking) bit set.
We can't run the kernel with that bit set, so when the kernel accesses
userspace no address masking occurs.
Since a 32-bit process will have no mappings in that region we will
properly fault, so we don't try to handle this using access_ok(),
which can safely just be a NOP on sparc64.
Real faults from 32-bit processes should never generate such addresses
so a bug check was added long ago, and it barks in the logs if this
happens.
But it also barks when a kernel user access causes this condition, and
that _can_ happen. For example, if a pointer passed into a system call
is "0xfffffffc" and the kernel access 4 bytes offset from that pointer.
Just handle such faults normally via the exception entries.
Signed-off-by: David S. Miller <davem@davemloft.net>
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versions.
Signed-off-by: Tom Herbert <therbert@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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pte_ERROR().
pte_ERROR() is not used anywhere, delete it.
For pgd_ERROR() and pmd_ERROR(), output something similar to x86, giving the address
of the pgd/pmd as well as it's value.
Also provide the caller, since these macros are invoked from pgd_clear_bad() and
pmd_clear_bad() which provides little context as to what high level operation was
occuring when the BAD state was detected.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Instead of returning false we should at least check the most basic
things, otherwise page table corruptions will be very difficult to
debug.
PMD and PTE tables are of size PAGE_SIZE, so none of the sub-PAGE_SIZE
bits should be set.
We also complement this with a check that the physical address the
pud/pmd points to is valid memory.
PowerPC was used as a guide while implementating this.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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In commit b2d438348024b75a1ee8b66b85d77f569a5dfed8 ("sparc64: Make
PAGE_OFFSET variable."), the MAX_PHYS_ADDRESS_BITS value was increased
(to 47).
This constant reference to '41UL' was missed.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Make get_user_insn() able to cope with huge PMDs.
Next, make do_fault_siginfo() more robust when get_user_insn() can't
actually fetch the instruction. In particular, use the MMU announced
fault address when that happens, instead of calling
compute_effective_address() and computing garbage.
Signed-off-by: David S. Miller <davem@davemloft.net>
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If we have a 32-bit task we must chop off the top 32-bits of the
64-bit value just as the cpu would.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Signed-off-by: David S. Miller <davem@davemloft.net>
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When _PAGE_SPECIAL and _PAGE_PMD_HUGE were added to the mask, the
comment was not updated.
Signed-off-by: David S. Miller <davem@davemloft.net>
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The large PMD path needs to check _PAGE_VALID not _PAGE_PRESENT, to
decide if it needs to bail and return 0.
pmd_large() should therefore just check _PAGE_PMD_HUGE.
Calls to gup_huge_pmd() are guarded with a check of pmd_large(), so we
just need to add a valid bit check.
Signed-off-by: David S. Miller <davem@davemloft.net>
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On sparc64 "present" and "valid" are seperate PTE bits, this allows us to
naturally distinguish between the user explicitly asking for PROT_NONE
with mprotect() and other situations.
However we weren't handling this properly in the huge PMD paths.
First of all, the page table walker in the TSB miss path only checks
for _PAGE_PMD_HUGE. So the generic pmdp_invalidate() would clear
_PAGE_PRESENT but the TLB miss paths would still load it into the TLB
as a valid huge PMD.
Fix this by clearing the valid bit in pmdp_invalidate(), and also
checking the valid bit in USER_PGTABLE_CHECK_PMD_HUGE using "brgez"
since _PAGE_VALID is bit 63 in both the sun4u and sun4v pte layouts.
Signed-off-by: David S. Miller <davem@davemloft.net>
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This code was mistakenly using the exec bit from the PMD in all
cases, even when the PMD isn't a huge PMD.
If it's not a huge PMD, test the exec bit in the individual ptes down
in tlb_batch_pmd_scan().
Signed-off-by: David S. Miller <davem@davemloft.net>
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Bring this code in line with the perf based generic NMI watchdog
in kernel/watchdog.c (which we should convert over to at some
point).
In particular, don't do anything super fancy when the watchdog
triggers, and specifically don't do a do_exit() which only makes
things worse.
Either panic(), or WARN(). The latter of which will do all of
the actions such as give us a stack backtrace.
Signed-off-by: David S. Miller <davem@davemloft.net>
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After introducing asm-generic/io.h a few things could still be cleaned up
o Drop useless macro indirection for sbus_* io access methods
They were in the past used to hide casts between long and pointers
but this is no longer so
o Fix function definitions for sbus memory functions so
return value appear on same line as function name
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Use asm-generic/io.h definitions where applicable.
The inxx() and outxx() methods whcih was duplicated in pcic.c +
leon_pci.c are replaced by a set of static inlins from asm-generic/io.h
iomap.c is replaced by the generic versions, but are still
present to support sparc64.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Daniel Hellstrom <daniel@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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The latter is a generic implmentation.
flip_{,d}word() is sparc32 specific and will be dropped.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Daniel Hellstrom <daniel@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Preparation for introducing asm-generic/io.h this move was required.
In asm-generic page_to_phys is placed in page.h - so do the same here.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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One more place where we must not be able
to be preempted or to be interrupted in RT.
Always actually disable interrupts during
synchronization cycle.
Signed-off-by: Kirill Tkhai <tkhai@yandex.ru>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Only the second argument, 'op', is signed.
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warnings:
leon_smp.c:133:6: warning: symbol 'leon_smp_setbroadcast' was not declared. Should it be static?
leon_smp.c:151:14: warning: symbol 'leon_smp_getbroadcast' was not declared. Should it be static?
leon_smp.c:269:6: warning: symbol 'leon_irq_rotate' was not declared. Should it be static?
leon_smp.c:355:6: warning: symbol 'leonsmp_ipi_interrupt' was not declared. Should it be static?
leon_smp.c:457:6: warning: symbol 'leon_cross_call_irq' was not declared. Should it be static?
Add static.
Remove unused functions.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Daniel Hellstrom <daniel@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warnings:
sun4d_smp.c:113:13: warning: symbol 'smp4d_boot_cpus' was not declared. Should it be static?
sun4d_smp.c:121:5: warning: symbol 'smp4d_boot_one_cpu' was not declared. Should it be static?
sun4d_smp.c:162:13: warning: symbol 'smp4d_smp_done' was not declared. Should it be static?
sun4d_smp.c:353:6: warning: symbol 'smp4d_cross_call_irq' was not declared. Should it be static?
sun4d_smp.c:363:6: warning: symbol 'smp4d_percpu_timer_interrupt' was not declared. Should it be static?
Add proper declarations
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warnings:
sun4m_smp.c:72:13: warning: symbol 'smp4m_boot_cpus' was not declared. Should it be static?
sun4m_smp.c:78:5: warning: symbol 'smp4m_boot_one_cpu' was not declared. Should it be static?
sun4m_smp.c:120:13: warning: symbol 'smp4m_smp_done' was not declared. Should it be static?
sun4m_smp.c:230:6: warning: symbol 'smp4m_cross_call_irq' was not declared. Should it be static?
sun4m_smp.c:240:6: warning: symbol 'smp4m_percpu_timer_interrupt' was not declared. Should it be static?
Add proper declarations.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warnings:
leon_pmc.c:15:14: warning: symbol 'pmc_leon_fixup_ids' was not declared. Should it be static?
leon_pmc.c:22:5: warning: symbol 'pmc_leon_need_fixup' was not declared. Should it be static?
leon_pmc.c:41:6: warning: symbol 'pmc_leon_idle_fixup' was not declared. Should it be static?
leon_pmc.c:65:6: warning: symbol 'pmc_leon_idle' was not declared. Should it be static?
Add static to definitions.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Daniel Hellstrom <daniel@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warnings:
leon_kernel.c:40:15: warning: symbol 'leon3_gptimer_idx' was not declared. Should it be static?
leon_kernel.c:68:6: warning: symbol 'leon_eirq_setup' was not declared. Should it be static?
leon_kernel.c:273:13: warning: symbol 'leon_percpu_timer_ce_interrupt' was not declared. Should it be static?
Define symbols as static.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Daniel Hellstrom <daniel@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warnings (both sparc32 and sparc64):
of_device_common.c:13:14: warning: symbol 'irq_of_parse_and_map' was not declared. Should it be static?
of_device_common.c:24:5: warning: symbol 'of_address_to_resource' was not declared. Should it be static?
of_device_common.c:37:14: warning: symbol 'of_iomap' was not declared. Should it be static?
Add missing includes.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warnings:
unaligned_32.c:146:15: warning: symbol 'safe_compute_effective_address' was not declared. Should it be static?
unaligned_32.c:235:17: warning: symbol 'kernel_unaligned_trap' was not declared. Should it be static?
unaligned_32.c:319:17: warning: symbol 'user_unaligned_trap' was not declared. Should it be static?
Add proper declarations in kernel.h + setup.h
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warning:
ptrace_32.c:444:16: warning: symbol 'syscall_trace' was not declared. Should it be static?
Add declaration in kernel.h
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warnings:
smp_32.c:300:6: warning: symbol 'arch_cpu_pre_starting' was not declared. Should it be static?
smp_32.c:320:6: warning: symbol 'arch_cpu_pre_online' was not declared. Should it be static?
smp_32.c:347:6: warning: symbol 'sparc_start_secondary' was not declared. Should it be static?
Add missing static definition.
This left one warning:
warning: symbol 'setup_profiling_timer' was not declared.
This is a global symbol that has no declaration in any global header.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warnings:
auxio_32.c:23:14: warning: symbol 'auxio_register' was not declared. Should it be static?
auxio_32.c:26:13: warning: symbol 'auxio_probe' was not declared. Should it be static?
auxio_32.c:108:13: warning: symbol 'auxio_power_probe' was not declared. Should it be static?
Add proper decalarations for the above.
The leaves one sparse warning:
auxio_32.c:130:33: warning: cast removes address space of expression
This is here:
auxio_power_register = (unsigned char *) of_ioremap()
This is __iomem that is removed from return value of of_ioremap()
The pointer is later used without any helpers in process_32.c:
*auxio_power_register |= AUXIO_POWER_OFF;
It would be simple to introduce a few sbus() helpers.
But as I was not sure this was correct the warning are left as-is.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warnings:
leon_pci_grpci2.c:218:1: warning: symbol 'grpci2_dev_lock' was not declared. Should it be static?
leon_pci_grpci2.c:219:20: warning: symbol 'grpci2priv' was not declared. Should it be static?
leon_pci_grpci2.c:221:5: warning: symbol 'grpci2_map_irq' was not declared. Should it be static?
leon_pci_grpci2.c:564:6: warning: symbol 'grpci2_hw_init' was not declared. Should it be
static?
+ a lot of these:
leon_pci_grpci2.c:252:9: warning: incorrect type in argument 1 (different address spaces)
Declare the symbols static as they are only used in this file.
Added missing __iomem annotations.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Daniel Hellstrom <daniel@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warnings:
leon_pci_grpci1.c:104:5: warning: symbol 'grpci1_map_irq' was not declared. Should it be static?
leon_pci_grpci1.c:420:6: warning: symbol 'grpci1_hw_init' was not declared. Should it be static?
+ a lot of these:
leon_pci_grpci1.c:693:18: warning: incorrect type in argument 1 (different address spaces)
Added missing static to definitions.
Added __iomem annotations
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Cc: Daniel Hellstrom <daniel@gaisler.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warnings:
tadpole.c:21:6: warning: symbol 'cpu_pwr_save' was not declared. Should it be static?
tadpole.c:101:13: warning: symbol 'clock_stop_probe' was not declared. Should it be static?
This actually revealed that cpu_pwr_save is only assigned.
It was left static with a TODO comment for now - this should be cleaned up later.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warning:
devices.c:114:13: warning: symbol 'device_scan' was not declared. Should it be static?
Add prototype to asm/setup.h
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following sparc32 warning:
cpu.c:430:29: warning: symbol 'cpuinfo_op' was not declared. Should it be static?
Fix following sparc64 warnings:
cpu.c:364:14: warning: symbol 'dcache_parity_tl1_occurred' was not declared. Should it be static?
cpu.c:365:14: warning: symbol 'icache_parity_tl1_occurred' was not declared. Should it be static?
Rearrange asm/cpu.h to share more stuff between sparc32 and sparc64.
Added missing include to cpu.c of kernel.h
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warnings:
windows.c:16:6: warning: symbol 'flush_user_windows' was not declared. Should it be static?
windows.c:109:6: warning: symbol 'try_to_clear_window_buffer' was not declared. Should it be static?
Add missing include of cacheflush.h + add declaration of try_to_clear_window_buffer in kernel.h
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warnings:
setup_32.c:106:15: warning: symbol 'cmdline_memory_size' was not declared. Should it be static?
setup_32.c:270:16: warning: symbol 'fake_swapper_regs' was not declared. Should it be static?
setup_32.c:368:55: warning: Using plain integer as NULL pointer
Add missing declaration of cmdline_memory_size and remove the local one in init_32.c
fake_swapper_regs was only used locally - so defined static.
When replacing 0 with NULL also add a few spaces around operators
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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Fix following warnings:
ioport.c:189:38: warning: Using plain integer as NULL pointer
ioport.c:78:25: warning: symbol 'sparc_iomap' was not declared. Should it be static?
ioport.c:403:20: warning: symbol 'sbus_dma_ops' was not declared. Should it be static?
ioport.c:684:39: warning: Using plain integer as NULL pointer
Add one missing prototype, and use NULL.
sbus_dma_ops declared static.
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
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